[go: up one dir, main page]

WO2007106023A1 - Filter for removal of particles from gases and liquids - Google Patents

Filter for removal of particles from gases and liquids Download PDF

Info

Publication number
WO2007106023A1
WO2007106023A1 PCT/SE2007/050036 SE2007050036W WO2007106023A1 WO 2007106023 A1 WO2007106023 A1 WO 2007106023A1 SE 2007050036 W SE2007050036 W SE 2007050036W WO 2007106023 A1 WO2007106023 A1 WO 2007106023A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
gases
liquids
lies
range
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.)
Ceased
Application number
PCT/SE2007/050036
Other languages
French (fr)
Inventor
Anders Magnusson
Jens-Petter Palmquist
Jörgen SAHLSTRÖM
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.)
Sandvik Intellectual Property AB
Original Assignee
Sandvik Intellectual Property AB
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 Sandvik Intellectual Property AB filed Critical Sandvik Intellectual Property AB
Publication of WO2007106023A1 publication Critical patent/WO2007106023A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2072—Other inorganic materials, e.g. ceramics the material being particulate or granular
    • B01D39/2075—Other inorganic materials, e.g. ceramics the material being particulate or granular sintered or bonded by inorganic agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2072—Other inorganic materials, e.g. ceramics the material being particulate or granular
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/5607—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides
    • C04B35/5611—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides based on titanium carbides
    • C04B35/5615—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides based on titanium carbides based on titanium silicon carbides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/5607—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides
    • C04B35/5611—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides based on titanium carbides
    • C04B35/5618—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on refractory metal carbides based on titanium carbides based on titanium aluminium carbides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00793—Uses not provided for elsewhere in C04B2111/00 as filters or diaphragms

Definitions

  • the present invention relates to a filter for separating particles from hot gases, cold gases and liquids.
  • filters are commercially available, such as chemical filters with open porosity, for extracting particles from diverse hot and cold corrosive gases and liquids and also catalytic layer carriers.
  • Cordierite has a low material cost and a good thermal shock resistance and also good durability with respect to tempera- ture gradients, and therewith enables the manufacture of monolithic filters which, per se, lowers production costs.
  • cordierite has the drawbacks of low resistance to corrosion and the inability to resist high temperatures.
  • Aluminium titanate has a high temperature tolerance and a high thermal shock resistance, but has a low mechanical strength and moderate resistance to corrosion.
  • Re-crystallized silicon carbide and silicon carbide into which silica has been filtered have both a high resistance to corrosion and a high temperature tolerance.
  • An optimal filter shall have high corrosion resistance and high oxidation tolerance, together with a high mechanical strength and a high thermal shock resistance and also capable of being produced as a monolithic filter.
  • a filter according to the present invention satisfies these requirements .
  • the present invention thus relates to a filter that has open porosity and that is intended to separate particles from gases and liquids, and is characterized in that the filter is produced from a powder material that includes the material M n+1 A 2 X n , where M is at least one material in the group of ma- terials titanium, vanadium, chromium, zirconium, niobium and tantalum, and where A is at least one material from the group aluminium, silicon, germanium, and where X is at least one material chosen from the group carbon and/or nitrogen, and in that the part of the total material which is from said group is given by n and z, where n lies in the range of 0.8 - 3.2 and where z lies in the range of 0.8 - 1.2.
  • the inventive filter is particularly suited for the separation of particles from hot flue gases that are oxidizing and corrosive.
  • the inventive filter is adapted for separating particles from gases and liquids.
  • the filter has an open porosity and is monolithic.
  • the filter is produced from a powder material that includes titanium and carbon, and one of the materials silicon and aluminium.
  • the filter is formed and then sintered at an appropriate temperature depending on the composition of the material.
  • Two materials from the material M n+ iA z X n are highly preferred in respect of the filter, namely that the filter will contain the material Ti 3 SiC 2 or that the filter will contain the material Ti 2 AlC.
  • Both of these materials will give the filter a high thermal shock resistance and a high mechanical strength, which enables the production of a monolithic filter and therewith keep production costs low. Resistance to corrosion has also been found very high.
  • the resistance to corrosion afforded by the material Ti 3 SiC 2 i.e. its resistance to the degradation of oxides, is good for temperatures at least up to 1000°C, since a protective oxide layer of SiO 2 /TiO 2 is formed on the surface.
  • the resistance to corrosion of the material Ti 2 AlC at high temperatures is due to the formation of aluminium oxide Al 2 O 3 on the surface of the material, this being a stable oxide.
  • the aluminium oxide is highly stable at high temperatures and consequently the material Ti 2 AlC has a very high resistance to corrosion, at least at temperatures up to 1400°C.
  • the oxidation resistance of Ti 2 AlC at high temperatures, such as temperatures of 1000 0 C, is better than that of Ti 3 SiC 2 .
  • the material has good oxidation resistance right up to 1400°C in an oxidizing environment.
  • the material Ti 3 SiC 2 has good oxidation resistance up to about 1000°C in an oxidizing environment.
  • a regenerating temperature may be as high as 1000°C or somewhat greater, depending on the filter application.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Filtering Materials (AREA)

Abstract

The present invention relates to a filter that has an open porosity and that is intended for separating particles from gases and liquids. The invention is characterized in that the filter is produced of a powder material that includes the material Mn+iAzXn, where M is at least one material chosen from the group titanium, vanadium, chromium, zirconium, niobium and tantalum, where A is at least one material from the group aluminium, silicon, germanium, and where X is at least a material chosen from the group carbon and/or nitrogen, wherein the initial part of the materials in the total amount of material is given by n and z, where n lies in the range of 0.8 - 3.2 and where z lies in the range of 0.8 - 1.2.

Description

FILTER FOR REMOVAL OF PARTICLES FROM GASES AND LIQUIDS
The present invention relates to a filter for separating particles from hot gases, cold gases and liquids.
A large number of filters are commercially available, such as chemical filters with open porosity, for extracting particles from diverse hot and cold corrosive gases and liquids and also catalytic layer carriers.
There are also used in this context a large number of different materials, such as cordierite, aluminium titanate, re- crystallized silicon carbide and a silica-bound silicon carbide, all of which afford some benefits, but also drawbacks that render their use in the production of an optimal filter impossible.
Cordierite has a low material cost and a good thermal shock resistance and also good durability with respect to tempera- ture gradients, and therewith enables the manufacture of monolithic filters which, per se, lowers production costs. However, cordierite has the drawbacks of low resistance to corrosion and the inability to resist high temperatures.
Aluminium titanate has a high temperature tolerance and a high thermal shock resistance, but has a low mechanical strength and moderate resistance to corrosion.
Re-crystallized silicon carbide and silicon carbide into which silica has been filtered have both a high resistance to corrosion and a high temperature tolerance. However, it is necessary to produce a filter in sections in order to obtain a structure that is able to withstand occurring temperature gradients, which results in high production costs. An optimal filter shall have high corrosion resistance and high oxidation tolerance, together with a high mechanical strength and a high thermal shock resistance and also capable of being produced as a monolithic filter.
A filter according to the present invention satisfies these requirements .
The present invention thus relates to a filter that has open porosity and that is intended to separate particles from gases and liquids, and is characterized in that the filter is produced from a powder material that includes the material Mn+1A2Xn, where M is at least one material in the group of ma- terials titanium, vanadium, chromium, zirconium, niobium and tantalum, and where A is at least one material from the group aluminium, silicon, germanium, and where X is at least one material chosen from the group carbon and/or nitrogen, and in that the part of the total material which is from said group is given by n and z, where n lies in the range of 0.8 - 3.2 and where z lies in the range of 0.8 - 1.2.
The present invention is described in more detail below, partially in connection with various exemplifying embodiments of the invention.
The inventive filter is particularly suited for the separation of particles from hot flue gases that are oxidizing and corrosive.
The inventive filter is adapted for separating particles from gases and liquids. The filter has an open porosity and is monolithic. According to the invention, the filter is produced from a powder material that includes titanium and carbon, and one of the materials silicon and aluminium.
In manufacture, the filter is formed and then sintered at an appropriate temperature depending on the composition of the material.
Two materials from the material Mn+iAzXn are highly preferred in respect of the filter, namely that the filter will contain the material Ti3SiC2 or that the filter will contain the material Ti2AlC.
Both of these materials will give the filter a high thermal shock resistance and a high mechanical strength, which enables the production of a monolithic filter and therewith keep production costs low. Resistance to corrosion has also been found very high.
The resistance to corrosion afforded by the material Ti3SiC2 i.e. its resistance to the degradation of oxides, is good for temperatures at least up to 1000°C, since a protective oxide layer of SiO2/TiO2 is formed on the surface.
The resistance to corrosion of the material Ti2AlC at high temperatures is due to the formation of aluminium oxide Al2O3 on the surface of the material, this being a stable oxide. The aluminium oxide is highly stable at high temperatures and consequently the material Ti2AlC has a very high resistance to corrosion, at least at temperatures up to 1400°C.
The oxidation resistance of Ti2AlC at high temperatures, such as temperatures of 10000C, is better than that of Ti3SiC2. The material has good oxidation resistance right up to 1400°C in an oxidizing environment.
The material Ti3SiC2 has good oxidation resistance up to about 1000°C in an oxidizing environment.
In the case of certain filter applications, such as the application of filters to cleanse flue gases, it is necessary that the filter can be regenerated. This involves subjecting the filter to a higher temperature than would be normal in a filtering operation. For example a regenerating temperature may be as high as 1000°C or somewhat greater, depending on the filter application.
The two materials given explicatively above are able to withstand such temperatures and are therefore also appropriate for filters that must be regenerated.
This also applies to filters that contain the material (Tii_xNbx)2AlC. X will lie in the preferred range of 0.05 - 0.5.
Although the invention has been described above with reference to a number of embodiments which include the material Mn+iAzXn, it will be understood that the inventors are aware that other materials Mn+iAzXn than the three materials mentioned explicitly above also have good properties with respect to corrosion resistance, oxidation resistance, thermal shock resistance and mechanical strength. This means that these other materials can be used in the production of a monolithic filter which is intended to work at temperatures of up to at least 10000C. The present invention shall not therefore be considered as being limited to the three materials mentioned above, since variations can be made within the scope of the accompanying claims .

Claims

1. A filter that has an open porosity and intended for separating particles from gases and liquids, characterized in that the filter is produced of a powder material that includes the material Mn+iAzXn, where M is at least one material chosen from the group titanium, vanadium, chromium, zirconium, niobium and tantalum, where A is at least one material from the group aluminium, silicon, germanium, and where X is at least one material chosen from the group carbon and/or nitrogen, wherein the initial part of the material in the total amount of material is given by n and z, where n lies in the range of 0.8 - 3.2 and where z lies in the range of 0.8 - 1.2.
2. A filter according to claim 1, characterized in that the filter is comprised generally of the material Ti3SiC2.
3. A filter according to claim 1, characterized in that the filter is comprised generally of the material Ti2AlC.
4. A filter according to claim 1, characterized in that the filter is comprised generally of the material (Tii_xNbx) 2A1C, where X lies in the range 0.05 - 0.5.
5. A filter according to any one of the preceding claims, characterized in that the filter is monolithic.
PCT/SE2007/050036 2006-03-14 2007-01-23 Filter for removal of particles from gases and liquids Ceased WO2007106023A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0600558A SE529721C2 (en) 2006-03-14 2006-03-14 Filters to separate particles from gases and liquids
SE0600558-1 2006-03-14

Publications (1)

Publication Number Publication Date
WO2007106023A1 true WO2007106023A1 (en) 2007-09-20

Family

ID=38509761

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2007/050036 Ceased WO2007106023A1 (en) 2006-03-14 2007-01-23 Filter for removal of particles from gases and liquids

Country Status (2)

Country Link
SE (1) SE529721C2 (en)
WO (1) WO2007106023A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103007633A (en) * 2012-12-21 2013-04-03 江苏云才材料有限公司 High temperature resistant, oxidation resistant and corrosion resistant MAX phase filtering separation element
CN109553418A (en) * 2018-12-05 2019-04-02 武汉轻工大学 A kind of Ti2AlC porous material and preparation method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004069745A1 (en) * 2003-02-07 2004-08-19 Sandvik Intellectual Property Ab Material for high temperatures

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004069745A1 (en) * 2003-02-07 2004-08-19 Sandvik Intellectual Property Ab Material for high temperatures

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103007633A (en) * 2012-12-21 2013-04-03 江苏云才材料有限公司 High temperature resistant, oxidation resistant and corrosion resistant MAX phase filtering separation element
CN109553418A (en) * 2018-12-05 2019-04-02 武汉轻工大学 A kind of Ti2AlC porous material and preparation method thereof
CN109553418B (en) * 2018-12-05 2021-08-13 武汉轻工大学 A kind of Ti2AlC porous material and preparation method thereof

Also Published As

Publication number Publication date
SE529721C2 (en) 2007-11-06
SE0600558L (en) 2007-09-15

Similar Documents

Publication Publication Date Title
US8551910B2 (en) Alumina titanate porous structure
JP4136319B2 (en) Honeycomb structure and manufacturing method thereof
EP3297971B1 (en) Gas-tight composite ceramic pipe
JP5237630B2 (en) Honeycomb structure
JP5544882B2 (en) Aluminum titanate ceramic honeycomb structure, method for producing the same, and raw material powder for producing the same
JP5810083B2 (en) Ceramic filter
WO2002040424A1 (en) Honeycomb structure and method for manufacture thereof
JP6023068B2 (en) Ceramic filter
US20060120937A1 (en) Multi-functional substantially fibrous mullite filtration substates and devices
CN107427771B (en) Catalytic ceramic candle filter and method for cleaning exhaust or exhaust gas
JPWO2002070433A1 (en) Honeycomb structure
KR20100039312A (en) The method of exhaust gas treatment catalyst with honeycomb structure using the titanium dioxide powder
WO2005005019A1 (en) Honeycomb filter for clarifying exhaust gas and method for manufacture thereof
WO2005014171A1 (en) Silicon carbide based catalyst material and method for preparation thereof
EP2046696B1 (en) Imroved diesel particulate filter
WO2007106023A1 (en) Filter for removal of particles from gases and liquids
JP5632369B2 (en) Fused particles of oxides containing Al, Ti and Mg and ceramic products containing such particles
US3928533A (en) Base metal titanate catalysts
JP3712785B2 (en) Exhaust gas filter and exhaust gas purification device
JPH119925A (en) Exhaust gas filter and manufacturing method thereof
KR20110028332A (en) Particle Blend to Synthesize Porous Structures of Aluminum Titanate Type
JP4900820B2 (en) Ceramic honeycomb filter
Stobbe et al. SiC as a substrate for diesel particulate filters
US20120171412A1 (en) Alumina titanate porous structure
CN108025984B (en) Method for producing porous alpha silicon carbide-containing bodies and bodies produced by the method

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07709429

Country of ref document: EP

Kind code of ref document: A1