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WO2025032352A1 - Procédé de surveillance de bulles de gaz - Google Patents

Procédé de surveillance de bulles de gaz Download PDF

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Publication number
WO2025032352A1
WO2025032352A1 PCT/IB2023/000463 IB2023000463W WO2025032352A1 WO 2025032352 A1 WO2025032352 A1 WO 2025032352A1 IB 2023000463 W IB2023000463 W IB 2023000463W WO 2025032352 A1 WO2025032352 A1 WO 2025032352A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
gas
outlet
inlet
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/IB2023/000463
Other languages
English (en)
Inventor
Mattéo CLERGET
Pascal Panizza
François LEQUEUX
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre National de la Recherche Scientifique CNRS
Ecole Superieure de Physique et Chimie Industrielles de Ville de Paris ESPCI
TotalEnergies Onetech SAS
Original Assignee
Centre National de la Recherche Scientifique CNRS
Ecole Superieure de Physique et Chimie Industrielles de Ville de Paris ESPCI
TotalEnergies Onetech SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Centre National de la Recherche Scientifique CNRS, Ecole Superieure de Physique et Chimie Industrielles de Ville de Paris ESPCI, TotalEnergies Onetech SAS filed Critical Centre National de la Recherche Scientifique CNRS
Priority to PCT/IB2023/000463 priority Critical patent/WO2025032352A1/fr
Publication of WO2025032352A1 publication Critical patent/WO2025032352A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • G01N33/0016—Sample conditioning by regulating a physical variable, e.g. pressure or temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0011—Sample conditioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
    • B01J10/002—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor carried out in foam, aerosol or bubbles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B01L3/502769—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by multiphase flow arrangements

Definitions

  • the present invention relates to a method and a device for monitoring gas bubbles.
  • the invention makes it possible to characterize the stability of gas bubbles in a confined environment under dynamic flow conditions.
  • Foams made of gas bubbles dispersed in a continuous liquid phase find various applications in different fields, such as Enhanced Oil Recovery (EOR), Carbon Capture, Usage and Storage (CCUS) or soil decontamination.
  • EOR Enhanced Oil Recovery
  • CCUS Carbon Capture, Usage and Storage
  • Garstecki et al, Lab Chip, 2006,6, 437-446, and US patent applications US20050172476A1 , US20100172803A1 and US20140037514A1 describe methods for forming emulsion or gas bubbles in a microfluidic device comprising a T-junction.
  • the foam is injected into a porous medium, and it is important to control the stability of the gas bubbles in such confined environment.
  • the stability of the gas bubbles refers to the ability of the gas bubbles to maintain their structure.
  • the structure is compromised when at least two individual gas bubbles in a liquid phase merge together to form a larger single entity (which is known as bubble coalescence or bubble merging).
  • Bubble coalescence is highly dependent on the gas (volume) fraction in the liquid phase, and the stability of gas bubbles flowing through a porous medium differs from the stability of gas bubbles in a less-constrained medium.
  • the physicochemical parameters controlling foam stability are poorly understood.
  • volume tests e.g., Bikerman’s foam test
  • porous media tests e.g., injecting a foam into a 3D model core or a porous medium
  • volume tests are often insufficiently predictive and fail to represent the dynamic flow conditions of the foam.
  • the porous media tests are expensive and time-consuming, as each injection is carried out for a single foam fraction, requiring repetitive experiments to accurately determine the critical gas fraction as well as compare critical gas fractions obtained from different formulations.
  • the absolute pressure at the inlet of the tube is from 20% to 10 times higher than the absolute pressure at the outlet of the tube.
  • the absolute pressure at the inlet of the tube is at least 300 mbar higher than the absolute pressure at the outlet of the tube.
  • the internal diameter of the tube is from 100 pm to 1 cm.
  • the length of the tube from the inlet to the outlet is equal to or larger than 500 times the square root of the internal cross-section of the tube.
  • the length of the tube from the inlet to the outlet is at least 1 m, preferably from 2 m to 10 m.
  • the gas comprises or is N2, CO2, and/or air.
  • the liquid is an aqueous solution, a non-aqueous solution, preferably oil or a mixture of oils, or an emulsion of an aqueous solution and a non-aqueous solution.
  • the liquid further comprises an additive, preferably selected from a surfactant, a co-surfactant, a polymer, an inorganic salt, solid particles (Pickering stabilizers), and combinations thereof.
  • the outlet of the tube is open to the atmosphere, so that the absolute pressure at the outlet of the tube is the atmospheric pressure.
  • the tube is coiled.
  • simultaneously recording images of the bubbles at a plurality of positions along the tube is carried out by recording images with a single camera having an observation field which encompasses the plurality of positions.
  • the flow of gas is fed at a controlled pressure, and preferably at a constant pressure; and wherein the flow of liquid is fed at a controlled flow rate, and preferably at a constant flow rate.
  • the method further comprises measuring the flow rate of gas fed to the bubble-generating portion of the device.
  • gas bubble coalescence occurs along the tube.
  • the gas fraction at the inlet of the tube is at least 15 vol.%, preferably at least 20 vol.%.
  • the method further comprises an initial phase of varying the flow rate of the fed liquid and/or varying the pressure of the fed gas, until bubble coalescence occurs along the tube.
  • the method comprises determining the gas fraction at the plurality of positions based on the recorded images; and preferably comprises determining a critical gas fraction based on the observation of bubble coalescence on the images recorded at one or more of the plurality of positions.
  • the method comprises a step of varying the composition of the liquid.
  • the method is for screening various liquid compositions so as to determine a liquid composition leading to the highest critical gas fraction.
  • the dimensions of the tube are such that, in use, the absolute pressure at the inlet of the tube is at least 10% higher than the absolute pressure at the outlet of the tube, assuming a flow of water without gas bubbles at a temperature of 20°C and at a flow rate of 1 mL/min.
  • the bubble-generating portion is a T- junction, a coaxial bubbles generator or a microfluidic flow-focusing device.
  • the dimensions of the tube are such that, in use, the absolute pressure at the inlet of the tube is from 20% to 10 times higher than the absolute pressure at the outlet of the tube.
  • the dimensions of the tube are such that, in use, the absolute pressure at the inlet of the tube is at least 300 mbar higher than the absolute pressure at the outlet of the tube.
  • the internal diameter of the tube is from 100 pm to 1 cm.
  • the length of the tube from the inlet to the outlet is equal to or larger than 500 times the square root of the internal crosssection of the tube.
  • the length of the tube from the inlet to the outlet is at least 1 m, preferably from 2 m to 10 m.
  • the outlet of the tube is open to the atmosphere, so that the absolute pressure at the outlet of the tube is the atmospheric pressure.
  • the tube is coiled.
  • the device comprises a single camera having an observation field which encompasses the plurality of positions.
  • the device comprises a pressure controller for feeding gas at a controlled pressure, and preferably at a constant pressure; and comprises a pump for feeding liquid at a controlled flow rate, and preferably at a constant flow rate.
  • the device comprises a flowmeter for measuring the flow rate of gas fed to the bubble-generating portion.
  • the present invention enables to address the need mentioned above.
  • the invention provides a method and a system which make it possible to monitor gas bubbles in a confined environment and characterize the stability of the gas bubbles under dynamic flow conditions quickly and easily in a single experiment.
  • foam is herein meant the medium comprising the liquid and the gas bubbles. It is understood that the foam which is formed and investigated in the device of the invention is representative of a foam which would be obtained in situ in a porous medium, in an application such as EOR or carbon capture.
  • one advantage of the invention is that multiple gas fractions can be tested along the tube at a low cost and with high throughput, thereby allowing the evolution of the foam to be observed in situ a under dynamic flow conditions, and that, when bubble coalescence occurs within the tube, the bubble coalescence can be characterized qualitatively and quantitatively.
  • These different gas fractions along the tube can be determined based on the recorded images of the bubbles at the plurality of positions along the tube, and then the critical gas fraction can be accurately determined.
  • the critical gas fraction corresponds to the maximum viscosity of the foam. When the gas fraction is above or below the critical gas fraction, the viscosity of the foam is less than the viscosity of said foam at the critical gas fraction.
  • another advantage of the invention is that various liquids can be easily and rapidly tested using the method or the system of the invention, and by comparing the critical gas fraction obtained with each liquid, the composition of the liquid can be optimized, leading to enhanced stability of the foam.
  • Figure 1 schematically illustrates one example of a device of the invention.
  • Figure 2 shows one example of the image of gas bubbles along a tube recorded according to the method of the invention, using the device of Figure 1.
  • a to E correspond to successive recording positions on the tube (distance from the tube inlet) of 1 m, 2 m, 3 m, 4 m, and 5 m, respectively.
  • Fg A and Fg E correspond to the gas fraction at the position A and E, respectively.
  • Figure 3 shows the variation of the gas fraction along the tube, using the device of Figure 1.
  • the top scheme illustrates the expansion of the gas bubbles along the tube, and the bottom graph shows corresponding gas fractions at different positions of the tube.
  • the distance from the tube inlet (m) can be read on the X-axis
  • the gas fraction (% in decimal representation) can be read on the Y-axis.
  • the crosses correspond to the determined gas fractions, and the line of best fit is constructed as a straight line.
  • the dotted line corresponds to the critical gas fraction (Fg*).
  • Figure 4 shows the variation of the gas flow rate on the Y-axis (pL/min) over time on the X-axis (min) at a given gas pressure while varying the flow rate of liquid.
  • the sudden change of the gas flow rate indicated by the dotted line, corresponds to the moment when bubble coalescence occurs, which corresponds to the moment when the critical gas fraction (Fg*) is reached.
  • Figure 5a to 5d show bubble size distributions across different bubble size ranges.
  • the relative bubble size can be read on the X-axis, and the distribution of the bubbles (%) falling within each size can be read on the Y-axis.
  • Figure 5a to 5d corresponds to liquid flow rates of 1 .1 mL/min, 1 mL/min, 0.6 mL/min, and 0.4 mL/min, respectively.
  • a to e correspond to the recording position on the tube (distance from the tube inlet) of 1 m, 2 m, 3 m, 4 m, and 5 m, respectively.
  • gas fraction refers to the ratio of the flow rate of gas to the total flow rate of gas and liquid (gas flow rate / (gas flow rate + liquid flow rate)), the flow rates being volume flow rates.
  • critical gas fraction refers to the minimum gas fraction at which bubble coalescence occurs in the device.
  • (bubble) coalescence refers to the merging of at least two bubbles.
  • the device for monitoring gas bubbles of the invention comprises:
  • the tube are such that, in use, the absolute pressure at the inlet of the tube is at least 10% higher than the absolute pressure at the outlet of the tube.
  • absolute pressure is means the pressure measured relative to the zero pressure, which is a theoretical vacuum.
  • the device of the invention may be a milifluidic or microfluidic device, in other words, the device may operate with volumes in the milliliter or microliter range.
  • the bubble-generating portion may be sized at the milimeter or micrometer scale.
  • the bubble-generating portion may be a T-junction, a coaxial bubbles generator or a flow-focusing device.
  • the device may comprise a valve at the bubble-generating portion.
  • the dimensions of the tube may be such that, in use, the absolute pressure at the inlet of the tube is from 10% to 10 times, or 20% to 10 times higher than the absolute pressure at the outlet of the tube.
  • the dimensions of the tube may be such that, in use, the absolute pressure at the inlet of the tube is at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, or at least 100% higher than the absolute pressure at the outlet of the tube.
  • the dimensions of the tube may be such that, in use, the absolute pressure at the inlet of the tube is at least 2 times, at least 3 times, at least 4 times, at least 5 times, at least 6 times, at least 7 times, at least 8 times, at least 9 times or at least 10 times higher than the absolute pressure at the outlet of the tube. It is preferred that the absolute pressure at the inlet of the tube is less than 50 times higher than the absolute pressure at the outlet of the tube, more preferably less than 20 times higher than the absolute pressure at the outlet of the tube.
  • the dimensions of the tube may be such that, in use, the absolute pressure at the inlet of the tube is at least 300 mbar higher than the absolute pressure at the outlet of the tube.
  • the dimensions of the tube may be such that, in use, the absolute pressure at the inlet of the tube is at least 300 mbar, at least 400 mbar, at least 500 mbar, at least 600 mbar, at least 700 mbar, at least 800 mbar, at least 900 mbar or at least 1000 mbar higher than the absolute pressure at the outlet of the tube.
  • the above pressure differentials, used to define the dimensions of the tube may be determined based on a flow of water (without gas bubbles) at a temperature of 20°C and at a flow rate of 1 mL/min.
  • the internal diameter of the tube may be from 100 pm to 1 cm.
  • the internal diameter of the tube may be from 100 pm to 200 pm, from 200 pm to 300 pm, from 300 pm to 400 pm, from 400 pm to 500 pm, from 500 pm to 600 pm, from 600 pm to 700 pm, form 700 pm to 800 pm, from 800 pm to 900 pm, from 900 pm to 0.1 cm, from 0.1 cm to 0.2 cm, from 0.2 cm to 0.3 cm, from 0.3 cm to 0.4 cm, from 0.4 cm to 0.5 cm, from 0.5 cm to 0.6 cm, from 0.6 cm to 0.7 cm, from 0.7 cm to 0.8 cm, from 0.8 cm to 0.9 cm, or from 0.9 cm to 1 cm.
  • the length of the tube from the inlet to the outlet may be equal to or larger than 500 times the square root of the internal cross-section of the tube.
  • the length of the tube herein refers to the distance of the tube along its longitudinal axis, between the inlet and outlet of the tube.
  • the internal crosssection of the tube herein refers to the internal surface area of the cut made perpendicular to the longitudinal axis of the tube.
  • the internal cross-section of the tube may take any suitable shape, for example, circular, rectangular, square, triangular, oval, elliptical, or hexagonal shape.
  • the internal cross-section of the tube is preferably circular.
  • the diameter refers to the maximum dimension of the internal cross-section.
  • the length of the tube from the inlet to the outlet may be at least 1 m, preferably from 2 m to 10 m.
  • the length of the tube may be from 1 to 2 m, from 2 to 3 m, from 3 to 4 m, from 4 to 5 m, from 5 to 6 m, from 6 to 7 m, from 7 to 8 m, from 8 to 9 m, or from 9 to 10 m.
  • the outlet of the tube may be open to the atmosphere, so that the absolute pressure at the outlet of the tube is the atmospheric pressure.
  • the outlet of the tube is not open to the atmosphere.
  • a supercritical gas e.g., supercritical CO2
  • the tube (and the bubble-generating portion) may be entirely under high pressure, while maintaining the pressure drop along the tube.
  • the tube is preferably wettable with the liquid used.
  • the tube may be made of any suitable material that allows for the visualization of the bubbles along the tube, such as fluorinated ethylene propylene, polytetrafluoroethylene Explosion, polyvinyl chloride, polyurethane, polyethylene, silicone, or glass.
  • the tube is preferably transparent, semi-transparent, or partially transparent.
  • the entire tube may be transparent, semi-transparent or partially transparent, or the tube may be transparent, semi-transparent or partially transparent only at the positions recorded by one or more cameras of the device.
  • the tube may be flexible (can be curved, bended or deformed), and/or may be curved.
  • the longitudinal axis of the tube is a curvilinear axis.
  • the tube may be coiled.
  • the tube may for example comprise from 1 to 20 coils, preferably from 2 to 15 coils, more preferably from 4 to 10 coils.
  • Such a coiled tube is advantageous because a single camera can record images at the plurality of positions, as shown in Fig. 1.
  • the device may comprise a single camera having an observation field which encompasses the plurality of positions.
  • the observation field may have a size of 2 cm x 2 cm.
  • the tube is not necessarily coiled and can be substantially straight.
  • the one or more cameras of the device may be any suitable camera used in the domain, especially for milifluidic devices.
  • the camera may be a high-speed camera or a microscope camera.
  • the device may further comprise a pressure controller for feeding gas at a controlled pressure.
  • the pressure controller may comprise, for example, a pressure regulator or a pressure sensor.
  • the pressure controller preferably feeds gas at a constant pressure.
  • the device may further comprise a flowmeter for measuring the flow rate of gas fed to the bubble-generating portion.
  • the flowmeter may be positioned between the pressure controller and the bubblegenerating portion.
  • the device may further comprise a pump for feeding liquid at a controlled flow rate.
  • the pump preferably feeds liquid at a constant flow rate.
  • the pump may be, for example, a syringe pump or a peristaltic pump.
  • the device may comprise two or more such pumps, especially when several liquids are used (which will be described later in detail).
  • the device may further comprise a thermostat for controlling the temperature of the fed liquid and/or the fed gas.
  • FIG. 1 One example of the device of the invention is illustrated in Fig. 1.
  • the device for monitoring bubbles 100 comprises a bubble-generating portion 1 fed by a gas flow line 2 and a liquid flow line 3.
  • the straight arrows refer to the directions of the flow of the gas, liquid or gas bubbles in a liquid phase.
  • the bubble-generating portion 1 is a T-junction, i.e. the gas flow line 2 and the liquid flow line 3 are connected to a single downstream line.
  • the device also comprises a tube 4 having an inlet 4’ and an outlet 4”.
  • the tube is coiled in this example.
  • the inlet 4’ is connected to the single downstream line mentioned above.
  • the device comprises a single camera 5 having an observation field which encompasses 5 positions A to E (for clarity, Fig. 1 illustrates an enlarged view of the dotted section of the tube).
  • the outlet 4 of the tube is open to the atmosphere.
  • the device further comprises a pressure controller 6, a gas flowmeter 7, a pump 8, and a valve 9.
  • the valve 9 can be adapted to close off the flow of gas, or it can be adapted to close off the flow of liquid, or it can be adapted to close off both the flow of gas and the flow of liquid.
  • the invention also relates to a method for monitoring gas bubbles in a device comprising a bubble-generating portion and a tube having an inlet and an outlet.
  • the device may be as described above.
  • the method comprises the steps of separately feeding a flow of gas and a flow of liquid to the bubble-generating portion 1 , generating individual gas bubbles in the liquid in the bubble-generating portion 1 (in Fig. 1, the individual bubbles are schematically shown as elongated shapes), flowing the generated bubbles within the tube 4, from the inlet 4’ to the outlet 4” thereof.
  • the bubbles are preferably generated as a one-dimensional stream within the tube.
  • the flow of gas may be fed through the gas flow line 2 and the flow of liquid may be fed through the liquid flow line 3.
  • the method further comprises simultaneously recording images of the bubbles at a plurality of positions A to E along the tube 4 with one or more cameras 5.
  • images is meant static representations captured at a specific moment intime, or a sequence of frames (a video sequence).
  • the absolute pressure at the inlet 4’ of the tube is at least 10% higher than the absolute pressure at the outlet 4” of the tube.
  • the absolute pressure at the inlet of the tube is at least 20%, at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, or at least 100% higher than the absolute pressure at the outlet of the tube.
  • the absolute pressure at the inlet of the tube may be at least 2 times, at least 3 times, at least 4 times, at least 5 times, at least 6 times, at least 7 times, at least 8 times, at least 9 times or at least 10 times higher than the absolute pressure at the outlet of the tube. It is preferred that the absolute pressure at the inlet of the tube is less than 50 times higher than the absolute pressure at the outlet of the tube, more preferably less than 20 times higher than the absolute pressure at the outlet of the tube.
  • the absolute pressure at the inlet of the tube may be at least 300 mbar higher than the absolute pressure at the outlet of the tube; or at least 400 mbar, at least 500 mbar, at least 600 mbar, at least 700 mbar, at least 800 mbar, at least 900 mbar or at least 1000 mbar higher than the absolute pressure at the outlet of the tube.
  • the pressure values indicated above, in the context of the method, are actual pressure values in use, which depend on the nature of the foam, on the liquid flow rate, and possibly on temperature.
  • the gas fraction Fg at the inlet 4’ is set by the gas and liquid feeding parameters. This gas fraction changes as the pressure drops along the tube, because the generated bubbles gradually expand along the tube due to gas compressibility, as shown in Fig. 2.
  • the absolute pressure at the position E is the lowest, and the absolute pressure at the position A is at least 10% higher than the absolute pressure at the position E.
  • the gas fraction varies (increases) along the tube linearly.
  • the gas fraction at the position E (Fg E ) is greater than the gas fraction at the position A (Fg A ) (Fg E > Fg A ).
  • the gas fraction Fg E may be at least 25% greater than the gas fraction Fg A .
  • the tube may be coiled.
  • the step of simultaneously recording images of the bubbles at a plurality of positions along the tube may be carried out by recording images with a single camera having an observation field which encompasses the plurality of positions.
  • the images of the bubbles are recorded with a single camera having an observation field which encompasses the 5 positions A to E (corresponding to the positions on the tube for example at 1 m, 2 m, 3 m, 4 m, and 5 m away from the tube inlet), but in another embodiment, the images may be recorded with two or more cameras.
  • the tube may be straight and cameras may be evenly spaced at fixed intervals along its length.
  • the tube may be designed in a meandering or zigzag pattern, and cameras may be placed at specific intervals along the meander (for example, every turn in the meander).
  • the tube may be a straight tube, a meandering tube or a zigzag tube, and cameras may be placed at gradually increasing intervals, or at varying intervals.
  • the gas bubbles at 5 positions are recorded, but any suitable number of positions can be selected for recording.
  • images of the gas bubbles may be recorded at 3, 4, 5, 6, 7, 8, 9, or 10 positions along the tube with one or more cameras.
  • the gas fraction at the inlet of the tube may be at least 15 vol.%.
  • the gas fraction at the inlet of the tube may be from 15 to 20 vol.%, from 20 to 30 vol.%, from 30 to 40 vol.%, from 40 to 50 vol.%, or 50 vol.%, to 60 vol.%.
  • the internal diameter and the length of the tube may be as described above in relation to the device for monitoring gas bubbles.
  • the gas preferably comprises or is N2, CO2, and/or air.
  • the gas may be in supercritical form.
  • the liquid may be an aqueous solution, preferably water, a non-aqueous solution, preferably oil or a mixture of oils, or an emulsion of an aqueous solution and a non-aqueous solution.
  • the liquid may further comprise an additive, preferably selected from a surfactant, a co-surfactant, a polymer, an inorganic salt, solid particles (Pickering stabilizers) and combinations thereof.
  • an additive preferably selected from a surfactant, a co-surfactant, a polymer, an inorganic salt, solid particles (Pickering stabilizers) and combinations thereof.
  • the absolute pressure at the outlet of the tube may be the atmospheric pressure (the outlet of the tube may be open to the atmosphere).
  • the absolute pressure along the entire tube may be under high pressure, while keeping the pressure drop along the tube.
  • the flow of gas may be fed at a controlled pressure, and preferably at a constant pressure, and the flow of liquid may be fed at a controlled flow rate, preferably at a constant flow rate.
  • the pressure may be controlled using a pressure controller, such as a pressure regulator or a pressure sensor.
  • the flow rate of liquid may be controlled using a pump, such as syringe pump or a peristaltic pump.
  • the method may further comprise measuring the flow rate of gas fed to the bubble-generating portion of the device.
  • the flow rate of gas may be measured using a flowmeter.
  • gas bubble coalescence may occur along the tube.
  • the invention makes it possible to study bubble coalescence qualitatively (for example, observation of the coalescence events in detail, the morphology of bubbles before, during, and after coalescence) and/or quantitatively (e.g., frequency of bubble coalescence or size of coalesced bubble based on bubble coalescence statistics).
  • the method may further comprise an initial phase of varying the flow rate of the fed liquid and/or varying the pressure of the fed gas, until bubble coalescence occurs along the tube.
  • the occurrence of bubble coalescence may be directly determined on the recorded images or may be determined by monitoring the gas flow rate and detecting a sharp change in the gas flow rate. This is described in more detail in relation with Fig. 4 below.
  • the flow rate of the fed liquid may be varied at a given pressure of the fed gas.
  • the pressure of the fed gas may be varied at a given flow rate of liquid.
  • the steady state (constant value of the gas fraction at a given position along the tube) may be reached before any measurements.
  • the controlled pressure preferably the constant pressure of the flow of gas and/or the controlled flow rate, preferably the constant flow rate of liquid may be selected such that bubble coalescence occurs along the tube.
  • the method may further comprise determining the gas fraction at the plurality of positions based on the recorded images.
  • the step of determining the gas fraction at the plurality of positions based on the recorded images can be performed by image analysis from the recorded images, for example, a video sequence.
  • image analysis a conventional software program for data analysis can be used, such as MATLAB, Imaged, and Origin.
  • the method may further comprise determining a critical gas fraction based on the observation of bubble coalescence on the images recorded at one or more of the plurality of positions.
  • the bubble coalescence may be observed as a double bubble (a larger bubble resulting from two bubbles merged).
  • the bubble coalescence may be observed visually on the recorded images and/or may be detected based on a sharp increase in the flow rate of gas when fed gas pressure increases (or when fed liquid flow rate decreases).
  • the method may further comprise a step of varying the composition of the liquid.
  • Varying the composition of the liquid may involve changing the concentration of an additive (e.g., an inorganic salt, surfactant, co-surfactant, polymer), or presence of different additive(s).
  • an additive e.g., an inorganic salt, surfactant, co-surfactant, polymer
  • the method may be used for screening various liquid compositions so as to determine a liquid composition leading to the highest critical gas fraction.
  • the critical gas fraction of a liquid of a certain composition may be determined according to the method of the invention, then the device may be cleaned with the liquid, and the critical gas fraction of a liquid of a different composition may be again determined according to the method of the invention.
  • composition of the liquid may be continuously changed, by for example switching the liquid flow among different compositions via multiple distinct pumps, and the impact of the variation of liquid composition on critical gas fraction can be directly determined.
  • Example 1 Determination of critical gas fraction The method of the invention was implemented using the device as shown in Fig. 1.
  • the gas fractions at the position 1 m, 2 m, 3 m, 4 m, and 5 m away from the tube inlet were determined (indicated with crosses).
  • the critical gas fraction was determined based on the observation of bubble coalescence on the images recorded at these positions.
  • Fig. 4 confirms the occurrence of bubble coalescence.
  • the method of the invention was implemented under the same conditions as above, except that the flow rate of liquid was varied from 5 mL/min to 0.1 mL/min.
  • Example 2 The experimental conditions were the same as in Example 1 , except that the flow rate of liquid was changed as follows: - Flow rate of liquid: 1 .1 mL/min, 1 mL/min, 0.6 mL/min and 0.4 mL/min
  • the initial gas fraction (gas fraction of the injected gas at 0 m) was determined to be 60% at the liquid flow rate of 1 .1 mL/min, 70% at the liquid flow rate of 1 mL/min, 75% at the liquid flow rate of 0.6 mL/min, and 80% at the liquid flow rate of 0.4 mL/min.
  • Fig. 5a demonstrates that the bubbles were almost stable along the entire tube: almost 100% of bubbles at the positions 1 m, 2 m, 3 m, and 4 m (a to d) were stable, although at 4 m (d) and 5 m (e), about 10% of bubbles had a relative size of 2, indicating double bubbles (bubbles each resulting from two merged bubbles), which corresponds to the first occurrence of coalescence (at which the gas fraction is just above the critical gas fraction).
  • Fig. 5b demonstrates that the bubbles started to destabilize at 3 m (c), and more double bubbles were observed at downstream positions. A small quantity of triple bubbles (bubbles each resulting from three bubbles merged) was also observed at the position 5 m (e).
  • Fig. 5c and Fig. 5d demonstrate that bubbles started to destabilize at 2 m (b) and 1 m (a), respectively, and more double bubbles were observed at downstream positions. A small quantity of triple bubbles and quadruple drops (bubbles each resulting from four bubbles merged) was also observed.

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Abstract

La présente invention concerne un procédé de surveillance de bulles de gaz dans un dispositif comprenant une partie de génération de bulles et un tube ayant une entrée et une sortie. Le procédé comprend les étapes consistant à : apporter séparément un débit de gaz et un débit de liquide à la partie de génération de bulles ; générer des bulles individuelles de gaz dans le liquide dans la partie de génération de bulles ; faire s'écouler les bulles générées au sein du tube, de l'entrée à la sortie de celui-ci ; la pression absolue à l'entrée du tube étant au moins 10 % supérieure à la pression absolue à la sortie du tube ; et enregistrer simultanément des images des bulles à une pluralité de positions le long du tube avec un ou plusieurs appareils de prise de vues.
PCT/IB2023/000463 2023-08-04 2023-08-04 Procédé de surveillance de bulles de gaz Pending WO2025032352A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100172803A1 (en) 2002-06-28 2010-07-08 President And Fellows Of Harvard College Method and apparatus for fluid dispersion

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100172803A1 (en) 2002-06-28 2010-07-08 President And Fellows Of Harvard College Method and apparatus for fluid dispersion
US20140037514A1 (en) 2002-06-28 2014-02-06 Governing Council of the Univ. of Toronto, the MaRS Centre Method and apparatus for fluid dispersion

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
GARSTECKI ET AL., LAB CHIP, no. 6, 2006, pages 437 - 446
LECLERC A ET AL: "Gas-liquid Taylor flow in square micro-channels: New inlet geometries and interfacial area tuning", CHEMICAL ENGENEERING JOURNAL, ELSEVIER, AMSTERDAM, NL, vol. 165, no. 1, 15 November 2010 (2010-11-15), pages 290 - 300, XP027483320, ISSN: 1385-8947, [retrieved on 20100814], DOI: 10.1016/J.CEJ.2010.08.021 *
NAZARI NEGAR ET AL: "The motion of long bubbles in microchannels using a meter-long, rectangular capillary on a chip", JOURNAL OF COLLOID AND INTERFACE SCIENCE, vol. 638, 21 January 2023 (2023-01-21), US, pages 149 - 160, XP093131362, ISSN: 0021-9797, DOI: 10.1016/j.jcis.2023.01.073 *
SEGERS TIM ET AL: "Stability of Monodisperse Phospholipid-Coated Microbubbles Formed by Flow-Focusing at High Production Rates", LANGMUIR, vol. 32, no. 16, 14 April 2016 (2016-04-14), US, pages 3937 - 3944, XP055778694, ISSN: 0743-7463, Retrieved from the Internet <URL:https://pubs.acs.org/doi/pdf/10.1021/acs.langmuir.6b00616> DOI: 10.1021/acs.langmuir.6b00616 *
SKURTYS ET AL: "Formation of bubbles and foams in gelatine solutions within a vertical glass tube", FOOD HYDROCOLLOIDS, ELSEVIER BV, NL, vol. 22, no. 4, 6 February 2008 (2008-02-06), pages 706 - 714, XP022458942, ISSN: 0268-005X, DOI: 10.1016/J.FOODHYD.2007.02.003 *
YAN PENG ET AL: "Flow characterization of gas-liquid with different liquid properties in a Y-type microchannel using electrical resistance tomography and volume of fluid model", JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS, ELSEVIER, AMSTERDAM, NL, vol. 136, 4 June 2022 (2022-06-04), XP087119290, ISSN: 1876-1070, [retrieved on 20220604], DOI: 10.1016/J.JTICE.2022.104390 *
ZHENG C ET AL: "Stability and pressure drop of gas-liquid micro-dispersion flows through a capillary", CHEMICAL ENGINEERING SCIENCE, OXFORD, GB, vol. 140, 19 October 2015 (2015-10-19), pages 134 - 143, XP029328983, ISSN: 0009-2509, DOI: 10.1016/J.CES.2015.10.012 *

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