WO1999020373A1 - Device for plasma processing of gases - Google Patents
Device for plasma processing of gases Download PDFInfo
- Publication number
- WO1999020373A1 WO1999020373A1 PCT/GB1998/003059 GB9803059W WO9920373A1 WO 1999020373 A1 WO1999020373 A1 WO 1999020373A1 GB 9803059 W GB9803059 W GB 9803059W WO 9920373 A1 WO9920373 A1 WO 9920373A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- further characterised
- insulating
- support
- electrodes
- Prior art date
Links
Classifications
-
- 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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
-
- 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
- B01D53/32—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 electrical effects other than those provided for in group B01D61/00
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/087—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
- B01J19/088—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
-
- 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
- B01J2219/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J2219/0894—Processes carried out in the presence of a plasma
Definitions
- the present invention relates to devices for the processing of gaseous media by means of plasmas, and more particularly, to such devices in which one electrode is positioned axially within another electrode.
- Such devices in particular for use in the treatment of exhaust gases from an internal combustion engine, operate in a very harsh environment.
- Hitherto ceramic materials such as alumina have been used to make the support plates and although these are satisfactory in so far as their chemical inertness and insulating properties are concerned, they are brittle and prone to fracture.
- an apparatus for the processing of gaseous media by means of a plasma wherein there is included at least one electrode which is maintained in position in relation to another by one or more insulating support structures made of a micaceous glass material.
- the micaceous glass material is that manufactured by Morgan Matroc Limited, a subsidiary of the Morgan Crucible Company, under the Trade Mark MICATHERM.
- the electrode or a metal attachment member therefor is secured to a said insulating support by in situ moulding of the support material on to the said electrode or metal attachment member.
- insulating supports and electrodes attached thereto directly or via metal attachment members can be formed as a self supporting removable and replaceable unit.
- a pair of insulating supports and a pair of electrodes define a space therebetween which is filled with pellets of active material.
- a reactor 1 for removing pollutants, such as NO ⁇ or carbonaceous combustion products, from the exhaust from an internal combustion engine consists of a cylindrical stainless steel chamber 2 which has an inlet stub 3 and an outlet stub 4 by means of which it can be connected into the exhaust system of an internal combustion engine.
- the chamber 2 is arranged, in use, to be connected to an earthing point 5.
- Perforated inner and outer cylindrical electrodes 6 and 14 respectively are positioned co-axially within the chamber 2 by means of two supports 7 and 8.
- the outer electrode 14 is held at earth potential by connection (not shown) to the earthed chamber 2.
- the upstream end of the inner electrode 6 is closed off and is arranged to be connected to a source 9 of a pulsed or continuous potential of the order of tens of kilovolts via an insulating feed through 10.
- Packed within the space 11 formed between the outer electrode 14, the inner electrode 6 and the supports 7 and 8 is a bed of pellets, represented diagramatically at 12, of an active material consisting of or incorporating ferroelectric material such as barium titanate.
- the upstream support 7 has a series of apertures 13 formed in it whereas the support 8 is impermeable. The exhaust gases therefore are constrained to flow through the reactor 1 in the manner shown in the figure.
- the selection of material composition of the pellets and the manner of operation of the reactor 1 are in this example based upon the considerations and examples described in our International Patent Application PCT/GB98/02569.
- the supports 7 and 8 are made of a lead-based glass with a dispersion of mica in it.
- the material which is marketed by Morgan Matroc Limited under the trade name MICATHERM is particularly suitable for the purposes of the present invention because not only does it have the required electrical properties and can withstand the operating environment of an internal combustion engine exhaust system, but it is resistant to thermal shock and can be formed readily into required shapes by moulding techniques.
- each of the supports 7 and 8 is moulded onto a concentric pair of cylindrical metal stubs 71, 72 and 81, 82 respectively.
- the stubs 71, 72 and 81, 82 are firmly fixed and sealed in the respective supports 7 and 8, and provide for attachment of the electrodes 6 and 14.
- inner electrode 6 is of slightly larger radius than the stubs 71 and 81 so that it can be pushed onto these stubs and fixedly attached to them in any suitable manner (e.g. welding) .
- Outer electrode 14 is similarly fixed on to stubs 72 and 82.
- the complete set of components comprising the supports 7 and 8, the electrodes 6 and 14 and the pellet bed 12 form a self supporting removable and replaceable unit, conveniently referred to as a "cassette". Provision for filling, or refilling, with pellets may be made by incorporating one or more removable plugs (not shown) in the support 7 and/or support 8.
- the feed through 10 need not necessarily be positioned on the side of the chamber 2 but may be positioned to extend through an end wall.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020007004240A KR20010031254A (en) | 1997-10-22 | 1998-10-09 | Device for plasma processing of gases |
AU93615/98A AU9361598A (en) | 1997-10-22 | 1998-10-09 | Device for plasma processing of gases |
EP98946619A EP1024882A1 (en) | 1997-10-22 | 1998-10-09 | Device for plasma processing of gases |
JP2000516758A JP2001520109A (en) | 1997-10-22 | 1998-10-09 | Gas plasma processing equipment |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9722173.3A GB9722173D0 (en) | 1997-10-22 | 1997-10-22 | Plasma gas processing device |
GB9722173.3 | 1997-10-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999020373A1 true WO1999020373A1 (en) | 1999-04-29 |
Family
ID=10820830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1998/003059 WO1999020373A1 (en) | 1997-10-22 | 1998-10-09 | Device for plasma processing of gases |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1024882A1 (en) |
JP (1) | JP2001520109A (en) |
KR (1) | KR20010031254A (en) |
AU (1) | AU9361598A (en) |
GB (1) | GB9722173D0 (en) |
WO (1) | WO1999020373A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001059270A1 (en) | 2000-02-10 | 2001-08-16 | Accentus Plc | Plasma assisted reactor |
WO2002066145A1 (en) * | 2001-02-19 | 2002-08-29 | Fujitsu Limited | Gas processing device and method |
US7163663B2 (en) | 2001-03-21 | 2007-01-16 | Accentus Plc | Reactor for plasma assisted treatment of gaseous |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3916057A (en) * | 1973-08-31 | 1975-10-28 | Minnesota Mining & Mfg | Intumescent sheet material |
US3925673A (en) * | 1973-03-12 | 1975-12-09 | Jr Joseph E Wright | Apparatus for generating heavy oxygen molecules |
US3983021A (en) * | 1971-06-09 | 1976-09-28 | Monsanto Company | Nitrogen oxide decomposition process |
US4954320A (en) * | 1988-04-22 | 1990-09-04 | The United States Of America As Represented By The Secretary Of The Army | Reactive bed plasma air purification |
EP0402142A1 (en) * | 1989-06-07 | 1990-12-12 | Satiko Okazaki | Process for removing NOx from exhaust gas using electric discharge |
EP0606014A1 (en) * | 1992-12-28 | 1994-07-13 | Bridgestone Corporation | Surface treating method |
US5554345A (en) * | 1992-10-14 | 1996-09-10 | Novozone (N.V.) Limited | Ozone generation apparatus and method |
US5609736A (en) * | 1995-09-26 | 1997-03-11 | Research Triangle Institute | Methods and apparatus for controlling toxic compounds using catalysis-assisted non-thermal plasma |
-
1997
- 1997-10-22 GB GBGB9722173.3A patent/GB9722173D0/en not_active Ceased
-
1998
- 1998-10-09 WO PCT/GB1998/003059 patent/WO1999020373A1/en not_active Application Discontinuation
- 1998-10-09 JP JP2000516758A patent/JP2001520109A/en active Pending
- 1998-10-09 EP EP98946619A patent/EP1024882A1/en not_active Withdrawn
- 1998-10-09 KR KR1020007004240A patent/KR20010031254A/en not_active Application Discontinuation
- 1998-10-09 AU AU93615/98A patent/AU9361598A/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3983021A (en) * | 1971-06-09 | 1976-09-28 | Monsanto Company | Nitrogen oxide decomposition process |
US3925673A (en) * | 1973-03-12 | 1975-12-09 | Jr Joseph E Wright | Apparatus for generating heavy oxygen molecules |
US3916057A (en) * | 1973-08-31 | 1975-10-28 | Minnesota Mining & Mfg | Intumescent sheet material |
US4954320A (en) * | 1988-04-22 | 1990-09-04 | The United States Of America As Represented By The Secretary Of The Army | Reactive bed plasma air purification |
EP0402142A1 (en) * | 1989-06-07 | 1990-12-12 | Satiko Okazaki | Process for removing NOx from exhaust gas using electric discharge |
US5554345A (en) * | 1992-10-14 | 1996-09-10 | Novozone (N.V.) Limited | Ozone generation apparatus and method |
EP0606014A1 (en) * | 1992-12-28 | 1994-07-13 | Bridgestone Corporation | Surface treating method |
US5609736A (en) * | 1995-09-26 | 1997-03-11 | Research Triangle Institute | Methods and apparatus for controlling toxic compounds using catalysis-assisted non-thermal plasma |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001059270A1 (en) | 2000-02-10 | 2001-08-16 | Accentus Plc | Plasma assisted reactor |
WO2002066145A1 (en) * | 2001-02-19 | 2002-08-29 | Fujitsu Limited | Gas processing device and method |
US7163663B2 (en) | 2001-03-21 | 2007-01-16 | Accentus Plc | Reactor for plasma assisted treatment of gaseous |
Also Published As
Publication number | Publication date |
---|---|
AU9361598A (en) | 1999-05-10 |
GB9722173D0 (en) | 1997-12-17 |
EP1024882A1 (en) | 2000-08-09 |
KR20010031254A (en) | 2001-04-16 |
JP2001520109A (en) | 2001-10-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7431755B2 (en) | Dust-collecting electrode and dust collector | |
KR920700774A (en) | Reactive Bad Plasma Air Purifier | |
US7799290B2 (en) | Decontamination of fluids or objects contaminated with chemical or biological agents using a distributed plasma reactor | |
US4725412A (en) | Ozone generator | |
WO1998008282A1 (en) | Corona discharge pollutant destruction apparatus and manufacture method | |
JP2007216193A (en) | Plasma discharge reactor with heating function | |
US5866081A (en) | Deposited inner electrode for corona discharge pollutant destruction reactor | |
WO1999020373A1 (en) | Device for plasma processing of gases | |
KR850007570A (en) | Sediment Gas Release Control Method | |
JP4046224B2 (en) | Electrode for gas excitation | |
EP1054728A4 (en) | Pulsed corona discharge apparatus with radial design | |
EP1064078B1 (en) | Gas processing reactors | |
RU95117322A (en) | DISCHARGE UNIT WITH COLD CATHODE | |
US4635271A (en) | Gas laser discharge tube with copper halide vapors | |
CN108607338A (en) | A kind of annular emission-control equipment component | |
JP2006026483A (en) | Exhaust emission control device | |
KR101887816B1 (en) | Hazardous gases purifying device | |
JP2006214392A (en) | Exhaust emission control device | |
RU2764684C1 (en) | Apparatus for purifying exhaust gases | |
JP3025497B1 (en) | Discharge type exhaust gas treatment equipment | |
JP2005256799A (en) | Exhaust emission control device | |
JP2005307832A (en) | Exhaust gas purifying device | |
KR102211053B1 (en) | Plasma Reactor of Dielectric Barrier Discharge and Gas Treatment Equipment | |
JPH0824562A (en) | Deodorizing device using discharge plasma | |
US20020192130A1 (en) | Apparatus and method for mat protection of non-thermal plasma reactor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1998946619 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09509810 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020007004240 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 1998946619 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWP | Wipo information: published in national office |
Ref document number: 1020007004240 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: CA |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1020007004240 Country of ref document: KR |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1998946619 Country of ref document: EP |