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US20060198774A1 - Mercury Removal sorbent - Google Patents

Mercury Removal sorbent Download PDF

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Publication number
US20060198774A1
US20060198774A1 US11/071,632 US7163205A US2006198774A1 US 20060198774 A1 US20060198774 A1 US 20060198774A1 US 7163205 A US7163205 A US 7163205A US 2006198774 A1 US2006198774 A1 US 2006198774A1
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United States
Prior art keywords
accordance
heavy metal
composition
vanadium oxide
weight
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Abandoned
Application number
US11/071,632
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English (en)
Inventor
Joseph Cross
Glenn Dodwell
Marvin Johnson
Edward Sughrue
Jianhua Yao
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ConocoPhillips Co
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ConocoPhillips Co
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Publication date
Application filed by ConocoPhillips Co filed Critical ConocoPhillips Co
Priority to US11/071,632 priority Critical patent/US20060198774A1/en
Assigned to CONOCOPHILLIPS COMPANY reassignment CONOCOPHILLIPS COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CROSS, JOSEPH B., DODWELL, GLENN W., JOHNSON, MARVIN M., SUGHRUE, EDWARD L., II, YAO, JIANHUA
Priority to PCT/US2006/006906 priority patent/WO2006096375A2/fr
Publication of US20060198774A1 publication Critical patent/US20060198774A1/en
Priority to US12/175,257 priority patent/US20080274877A1/en
Priority to US12/175,317 priority patent/US7744763B2/en
Abandoned legal-status Critical Current

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    • 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
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8665—Removing heavy metals or compounds thereof, e.g. mercury
    • 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
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0214—Compounds of V, Nb, Ta
    • 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
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3204—Inorganic carriers, supports or substrates
    • 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
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/104—Alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B01D2253/108—Zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/112—Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/60—Heavy metals or heavy metal compounds
    • B01D2257/602—Mercury or mercury compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/414—Further details for adsorption processes and devices using different types of adsorbents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S210/00—Liquid purification or separation
    • Y10S210/902—Materials removed
    • Y10S210/911—Cumulative poison
    • Y10S210/912—Heavy metal
    • Y10S210/914—Mercury
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S502/00—Catalyst, solid sorbent, or support therefor: product or process of making
    • Y10S502/515—Specific contaminant removal
    • Y10S502/516—Metal contaminant removal

Definitions

  • the invention relates to a composition and method for removing heavy metal contaminates from fluid streams.
  • the invention relates to a method of preparing such composition.
  • the invention relates to a process for removing heavy metal contaminates, such as mercury and mercury compounds, from flue gas streams produced from the combustion of hydrocarbon-containing materials.
  • Heavy metals are released during the combustion process of many fossil fuels and/or waste materials. These heavy metals include, for example, arsenic, beryllium, lead, cadmium, chromium, nickel, zinc, mercury, and barium. Most of these heavy metals are toxic to humans and animals. In particular, elemental mercury and mercury compounds such as mercury chlorides are thought to compromise the health and mental acuity of young children and fetuses.
  • a further object of this invention is to provide a method for making an improved vanadium material by incorporating a vanadium oxide compound and an alkali metal hydroxide promoter with a porous support material.
  • Another object of this invention is to provide a process for removing heavy metals or heavy metal compounds from a fluid stream by contacting the fluid stream with an improved vanadium material.
  • Yet another object of this invention is to provide an improved vanadium material which when used in the removal of heavy metals results in the oxidation of the heavy metal to an oxidation state greater than zero.
  • the inventive composition comprises a porous support material including a vanadium oxide compound and an alkali metal vanadate incorporated thereon, therein, or thereon and therein.
  • the inventive composition comprises a porous support material impregnated with a vanadium oxide compound and an alkali metal promoter selected from the group consisting of lithium hydroxide, lithium vanadate, and mixtures thereof.
  • the inventive composition can be prepared by the method of: (a) mixing a vanadium oxide compound and an alkali metal hydroxide promoter with at least one porous support material.
  • the inventive composition can be used in the removal of at least one heavy metal or heavy metal containing compound from a fluid stream by (a) contacting the fluid stream with a porous support material having incorporated onto, into, or onto and into a vanadium oxide compound and an alkali metal promoter for sorption of at least a portion of the at least one heavy metal or heavy metal containing compound.
  • the inventive composition can be used in the removal of at least one heavy metal or heavy metal containing compound from a flue gas stream produced by the combustion of a hydrocarbon-containing fuel by: (a) contacting the flue gas stream with a first sorbent material comprising a porous support having incorporated onto, into, or onto and into a vanadium oxide compound and an alkali metal promoter for sorbing at least a portion of the at least one heavy metal or heavy metal containing compound present in the flue gas stream; and (b) contacting the flue gas with a second sorbent material different from the first sorbent material for sorbing at least a portion of the at least one heavy metal-containing compound not sorbed during step (a).
  • FIG. 1 is a graph of mercury uptake versus mercury breakthrough for a lithium promoted V 2 O 5 sorbent on a porous support compared to a conventional activated charcoal sorbent;
  • FIG. 2 is a graph of the mercury removal efficiency for a lithium promoted V 2 O 5 sorbent on a porous support.
  • Compositions according to the present invention generally comprise a porous support material with a vanadium oxide compound and an alkali metal promoter incorporated thereon, therein, or thereon and therein.
  • the vanadium oxide compound comprises V 2 O 5 , a hydrate of V 2 O 5 , a peroxo complex of vanadium oxide or combinations thereof.
  • the vanadium component it is within the scope of the invention for the vanadium component to have any oxidation state greater than zero.
  • an alkali metal promoter is employed to increase the effectiveness of the vanadium oxide in sorbing heavy metals.
  • the alkali metal promoter is an alkali metal hydroxide such as lithium hydroxide.
  • the alkali metal hydroxide promoter it is possible for at least a portion of the alkali metal hydroxide promoter to react with at least a portion of the vanadium oxide compound to form an alkali metal vanadate such as lithium vanadate. Hydrates of alkali metal hydroxides can also be used such as lithium hydroxide monohydrate.
  • the promoter it is within the scope of the present invention for the promoter to be an elemental alkali metal, an alkali metal compound, or an ionic alkali metal species.
  • the term “promoter” refers to any such alkali metal composition whether it was originally added to the inventive sorbent or whether it was formed in situ.
  • the vanadium oxide compound and promoter are loaded onto a porous support material.
  • the support material is selected from the group consisting of amorphous silica-alumina, a zeolite, a material comprising meta-kaolin, alumina, expanded perlite, and combinations thereof. It is most preferable to employ a silica-alumina support material such as meta-kaolin in conjunction with expanded perlite, however, it is possible that the support may comprise pure alumina or calcined alumina.
  • the overall composition preferably comprises from about 0.5-40% by weight vanadium. Unless otherwise specified, the phrase “by weight vanadium” is defined as the elemental weight of vanadium present in the composition. More preferably, the composition comprises from about 1-35% by weight vanadium, and most preferably from about 2-25% by weight.
  • the composition preferably comprises from about 0.5-50% by weight of the alkali metal promoter, more preferably from about 1-30% by weight, and most preferably from about 5-25% by weight.
  • the weight ratio of vanadium oxide to promoter is preferably within the range of about 10:1 to 1:10, more preferably between about 5:1 to 1:5, and most preferably between about 4:1 to 1:1.
  • the sorbent material is formed by mixing a vanadium oxide compound and an alkali metal promoter with at least one porous support.
  • the vanadium oxide compound and promoter should be intimately contacted with the support so that the vanadium oxide compound and promoter become incorporated onto, into, or onto and into the support.
  • the vanadium oxide and promoter are dispensed in a first solution.
  • Water is a preferred solvent for forming this solution, however, any solvent capable of dissolving both the vanadium oxide and promoter may be used.
  • the vanadium oxide comprises from about 0.5-70% by weight of the solution, more preferably between about 5-60% by weight, and most preferably from about 10-50% by weight.
  • the promoter comprises from about 0.05-50% by weight of the solution, more preferably from about 0.5-40% by weight, and most preferably from about 1-30% by weight.
  • the porous support is dispersed in a second solution, with water being a preferred solvent.
  • an alkali metal hydroxide is selected as the promoter that is mixed with the vanadium oxide compound, generally, at least a portion of the alkali metal hydroxide reacts with at least a portion of the vanadium oxide compound to form an alkali metal vanadate, also referred to herein as a “promoter.”
  • the first and second solutions are then mixed together thereby loading the vanadium oxide and promoter onto, into, or onto and into the support.
  • the mixture is then dried, and preferably, the resulting sorbent material is in a granular or powder form. It is possible that the porous support used is not in a finely divided form prior to mixing with the vanadium oxide and promoter solution. If such is the case, it is preferable to crush and sieve the dried sorbent material to an acceptable particle size for a given application.
  • the sorbant material may also be pelletized, formed into monoliths, or incorporated into a foam in order to render it suitable for a specific application.
  • the inventive sorbent material is particularly useful in the removal of heavy metals and heavy metal containing compounds from fluid streams, especially flue gas streams produced by the combustion of hydrocarbon-containing materials such as coal and petroleum fuels.
  • fluid streams are often contaminated with at least one heavy metal or compound containing a heavy metal selected from the group consisting of arsenic, beryllium, lead, cadmium, chromium, nickel, zinc, mercury, and barium.
  • methods of removing heavy metal and heavy metal containing compounds from fluid streams comprise providing a sorbent composition according to the present invention and contacting the stream with the inventive sorbent.
  • Flue gas such as that created by the combustion of hydrocarbon-containing compounds, generally comprises at least about 10% by weight N 2 , more preferably at least about 50% by weight, and most preferably between about 75-90% by weight. Flue gas also generally comprises less than about 10% by weight of uncombusted hydrocarbons, more preferably less than about 5% by weight, and most preferably less than about 1% by weight. As described below, in a particularly preferred application, the flue gas will have already been treated for removal of NO x and SO x prior to any heavy metal removal process as the presence of high levels of NO x and SO x compounds may lead to fouling of the heavy metal removal sorbents.
  • the flue gas comprises less than about 800 ppm of SO x compounds such as SO 2 , more preferably less than about 500 ppm, and most preferably less than about 400 ppm. Also, the flue gas preferably comprises less than about 400 ppm NO x such as NO and NO 2 , more preferably less than about 250 ppm, and most preferably less than about 150 ppm. Flue gas may also comprise between about 2.5-10% by weight O 2 , between about 1-5% by weight CO 2 , and between about 5-20% by weight H 2 O.
  • the pressure drop associated with the contacting step should not exceed more than about 20 psia. More preferably, the pressure drop in the fluid stream is less than about 10 psia, and most preferably less than about 5 psia.
  • flue gas streams do not flow under high pressures. Therefore, if the pressure drop is too great, back pressure is created and can affect the combustion process by which the flue gas is created.
  • the arrangement of the sorbent material in the vessel in which contacting occurs can assist in minimizing this pressure drop.
  • the sorbent material comprises finely divided particles that are suspended in the fluid stream during the contacting step.
  • the sorbent material may be positioned in a fluidized bed, placed in a packed bed column, formed into monoliths, or incorporated into a foam.
  • pressure drop may become much more of a concern and may require the use of fans or other equipment to increase the pressure of the flue gas stream.
  • the fluid stream containing the heavy metal contaminant preferably has a temperature of between about 50-400° F. during the contacting step, more preferably between about 100-375° F., and most preferably between about 200-350° F.
  • the temperature of the fluid stream at the contacting stage is in part affected by upstream processes such as particulate removal systems (i.e., cyclones), other contaminant removal systems, heat exchange systems, etc.
  • the contacting step results in the sorption of at least about 80% by weight of the heavy metals contained in the fluid stream, more preferably at least about 90% by weight, even more preferably at least about 95% by weight, and most preferably at least about 98% by weight.
  • the vanadium oxide incorporated support material exhibits a high capacity for sorbing heavy metals and heavy metal containing compounds.
  • the vanadium oxide material is capable of sorbing at least about 1 atom of a heavy metal per every 5 atoms of vanadium. More preferably, the ratio of heavy metal atoms sorbed to vanadium atoms is at least about 1:3, and most preferably 1:1.
  • the sorbent material also exhibits the ability to oxidize the elemental heavy metal into a heavy metal containing compound such as a heavy metal oxide or chloride.
  • a heavy metal containing compound such as a heavy metal oxide or chloride.
  • the sorbent material oxidizes mercury into various oxidized species such as Hg +1 , Hg +2 , or mercury compounds such as HgO, HgCl, and HgCl 2 .
  • Hg +1 , Hg +2 mercury compounds
  • HgO, HgCl, and HgCl 2 mercury compounds
  • some of these heavy metal containing compounds may desorb or break free from the sorbent material. In that case, it can be particularly useful to employ a downstream heavy metal compound removal system in conjunction with the above-described sorbent system.
  • the gaseous product stream is contacted with a separate adsorbent in an adsorption zone.
  • the adsorbent can be any adsorbent capable of adsorbing a heavy metal; however, preferred materials for removing the heavy metal compounds include those having a hydrophobic surface with pore openings of less than about 10 ⁇ , and high pore volumes. More preferably, the adsorbent comprises, consists of or consists essentially of a material selected from the group consisting of a zeolite, amorphous carbon and combinations thereof.
  • the amorphous carbon can be an activated carbon and/or activated charcoal.
  • Exemplary zeolites include those with 8-12 member ring openings, and particularly ZSM-5 zeolite.
  • the material may be in the form of granules, pellets, monoliths, powders that are collected on filters, or combinations thereof.
  • a treated gaseous product stream is withdrawn from the adsorption zone and contains less than about 20 weight %, preferably less than about 10 weight %, and more preferably less that about 5 weight % of the heavy metal in the gaseous feed stream.
  • the heavy metal compound removal system may be contained in a separate downstream vessel from the vanadium oxide sorbent, or can be situated along with the vanadium oxide sorbent in a multiple stage contacting vessel so that the flue gas first contacts the vanadium oxide sorbent followed by the heavy metal compound removal sorbent.
  • the heavy metal compound removal system preferably results in the sorption of at least about 80% by weight of the heavy metal containing compounds that break through the vanadium oxide sorbent material, more preferably at least about 90% by weight, and most preferably at least about 95% by weight.
  • the overall sorptive efficiency may be affected by the presence of NO x and SO x compounds present in the flue gas.
  • SO 2 contained in the flue gas stream may be oxidized to SO 3 and then converted to H 2 SO 4 in the presence of water.
  • the H 2 SO 4 then may fill the pores of the vanadium oxide sorbent thereby decreasing the sorptive capacity thereof and blocking active catalyst sites. Therefore, it is preferable to employ an upstream NO x and SO x removal process in order to avoid fouling of the vanadium oxide sorbent material. Any conventional NO x and SO x removal process would be suitable for use with the present invention.
  • the NO x and SO x removal process should preferably remove at least about 50% by weight of all NO x and SO x present in the flue gas stream. It is preferable for the flue gas stream immediately prior to contact with the vanadium oxide sorbent to comprise less than about 400 ppm NO x , more preferably less than about 250 ppm, and most preferably less than about 150 ppm. Likewise, it is preferable for the flue gas stream immediately prior to contact with the vanadium oxide sorbent to comprise less than about 800 ppm SO x , more preferably less than about 500 ppm, and most preferably less than about 400 ppm.
  • the heavy metal compound removal system is capable of performing effectively even at high flue gas flow rates (i.e., greater than 10,000 gas hourly space velocity).
  • the sorbent material used in the heavy metal compound removal system may be placed in a fluidized or packed bed vessel, however, as with the vanadium oxide sorbent material system above, the pressure drop of the flue gas stream should be minimized to avoid requiring the use of additional equipment to compensate for the pressure drop.
  • the material was then tested for efficacy in removing elemental mercury entrained in an air stream at a concentration of approximately 1000 ⁇ g/m 3 (ppb w/v).
  • Approximately 0.97 g of the sorbent was placed in a fixed bed reactor, the temperature of which was held constant at 300° F.
  • the air flow rate through the fixed bed reactor was fixed at a gas hourly space velocity of >10,000 (approximately 200 mL/min).
  • the air stream entering and exiting the fixed bed reactor was periodically analyzed using a Jerome Mercury Analyzer.
  • FIG. 1 shows the mercury uptake versus the mercury breakthrough of the sorbent material.
  • literature data for sulfur impregnated activated charcoal (SIAC) a conventional sorbent for this application, is also shown.
  • the lithium promoted V 2 O 5 sorbent demonstrated excellent capacity for sequestering mercury when compared with the SIAC literature data.
  • FIG. 2 further demonstrates the effectiveness of the sorbent in removing mercury from the air stream in terms of efficiency of the sorbent versus mercury uptake. The sorbent exhibited greater than 95% efficiency over extended test periods. In sum, the test results indicate that the lithium promoted V 2 O 5 sorbent material has a high capacity for sorbing mercury and is exceptionally efficient in mercury removal.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Treating Waste Gases (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
US11/071,632 2005-03-03 2005-03-03 Mercury Removal sorbent Abandoned US20060198774A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US11/071,632 US20060198774A1 (en) 2005-03-03 2005-03-03 Mercury Removal sorbent
PCT/US2006/006906 WO2006096375A2 (fr) 2005-03-03 2006-02-28 Sorbant pour l'elimination du mercure
US12/175,257 US20080274877A1 (en) 2005-03-03 2008-07-17 Mercury removal sorbent
US12/175,317 US7744763B2 (en) 2005-03-03 2008-07-17 Mercury removal sorbent

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Application Number Priority Date Filing Date Title
US11/071,632 US20060198774A1 (en) 2005-03-03 2005-03-03 Mercury Removal sorbent

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US12/175,317 Division US7744763B2 (en) 2005-03-03 2008-07-17 Mercury removal sorbent
US12/175,257 Division US20080274877A1 (en) 2005-03-03 2008-07-17 Mercury removal sorbent

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US12/175,257 Abandoned US20080274877A1 (en) 2005-03-03 2008-07-17 Mercury removal sorbent

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US20070249495A1 (en) * 2006-03-15 2007-10-25 Xingtao Gao Catalyst composition for reducing gasoline sulfur content in catalytic cracking process
CN100431957C (zh) * 2006-09-12 2008-11-12 内蒙古蒙西高岭粉体股份有限公司 煤系高岭土的流态化瞬间煅烧工艺
WO2011116788A1 (fr) 2010-03-25 2011-09-29 Saint Petersburg State University Titanates en feuillets
CN102437322A (zh) * 2011-11-23 2012-05-02 陕西科技大学 微波自蔓延燃烧制备LiV3O8微晶的方法
CN114177880A (zh) * 2021-12-23 2022-03-15 安徽建筑大学 一种水合钒酸氢钠薄膜作为重金属吸附材料的应用

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US20080274877A1 (en) 2008-11-06

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