WO2000013775A1 - Structure catalytique permettant de reguler les emissions d'echappement et dispositif s'y rapportant - Google Patents
Structure catalytique permettant de reguler les emissions d'echappement et dispositif s'y rapportant Download PDFInfo
- Publication number
- WO2000013775A1 WO2000013775A1 PCT/JP1999/004909 JP9904909W WO0013775A1 WO 2000013775 A1 WO2000013775 A1 WO 2000013775A1 JP 9904909 W JP9904909 W JP 9904909W WO 0013775 A1 WO0013775 A1 WO 0013775A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- catalyst
- exhaust gas
- plate
- catalyst structure
- mesh
- Prior art date
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- 239000003054 catalyst Substances 0.000 title claims abstract description 255
- 229910052751 metal Inorganic materials 0.000 claims abstract description 39
- 239000002184 metal Substances 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000000919 ceramic Substances 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract 2
- 239000007789 gas Substances 0.000 claims description 152
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 20
- 238000000746 purification Methods 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 14
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 14
- 239000002759 woven fabric Substances 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 11
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000011733 molybdenum Substances 0.000 claims description 10
- 229910052750 molybdenum Inorganic materials 0.000 claims description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052721 tungsten Inorganic materials 0.000 claims description 9
- 239000010937 tungsten Substances 0.000 claims description 9
- 229910052720 vanadium Inorganic materials 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims 3
- 239000003546 flue gas Substances 0.000 claims 3
- 229910021529 ammonia Inorganic materials 0.000 claims 2
- 238000003916 acid precipitation Methods 0.000 claims 1
- 239000004480 active ingredient Substances 0.000 claims 1
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- 238000010531 catalytic reduction reaction Methods 0.000 claims 1
- 239000003638 chemical reducing agent Substances 0.000 claims 1
- 239000003245 coal Substances 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 claims 1
- 230000006866 deterioration Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 claims 1
- 239000012535 impurity Substances 0.000 claims 1
- 239000004745 nonwoven fabric Substances 0.000 claims 1
- 238000010248 power generation Methods 0.000 claims 1
- 239000011521 glass Substances 0.000 abstract description 12
- 241000276425 Xiphophorus maculatus Species 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 description 54
- 239000011230 binding agent Substances 0.000 description 13
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000002002 slurry Substances 0.000 description 9
- 238000009434 installation Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 210000002268 wool Anatomy 0.000 description 7
- 239000003365 glass fiber Substances 0.000 description 6
- 239000012784 inorganic fiber Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- ALTWGIIQPLQAAM-UHFFFAOYSA-N metavanadate Chemical compound [O-][V](=O)=O ALTWGIIQPLQAAM-UHFFFAOYSA-N 0.000 description 4
- 235000006408 oxalic acid Nutrition 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 241001303829 Lavia Species 0.000 description 1
- 241001446467 Mama Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241000256011 Sphingidae Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- XDDAORKBJWWYJS-UHFFFAOYSA-N glyphosate Chemical compound OC(=O)CNCP(O)(O)=O XDDAORKBJWWYJS-UHFFFAOYSA-N 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- 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
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/322—Basic shape of the elements
- B01J2219/32286—Grids or lattices
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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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/324—Composition or microstructure of the elements
- B01J2219/32408—Metal
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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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/324—Composition or microstructure of the elements
- B01J2219/32425—Ceramic
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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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/324—Composition or microstructure of the elements
- B01J2219/32441—Glass
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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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/324—Composition or microstructure of the elements
- B01J2219/32466—Composition or microstructure of the elements comprising catalytically active material
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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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
- B01J2219/326—Mathematical modelling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/12—Metallic wire mesh fabric or knitting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
- F01N2330/321—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils with two or more different kinds of corrugations in the same substrate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
- F01N2330/323—Corrugations of saw-tooth or triangular form
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
- F01N2330/324—Corrugations of rectangular form
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/38—Honeycomb supports characterised by their structural details flow channels with means to enhance flow mixing,(e.g. protrusions or projections)
Definitions
- An object of the present invention is to provide a highly efficient and compact exhaust gas purifying catalyst structure and an exhaust gas purifying apparatus.
- An exhaust gas purifying catalyst structure disposed in a frame adapted to an exhaust gas channel, wherein the catalyst structure is formed by alternately bending plate-shaped catalysts at predetermined intervals in opposite directions. Or an exhaust gas consisting of a plate-like catalyst having many peaks and valleys and a gas dispersion made of a metal, ceramic or glass mesh having many holes penetrating on both sides. Purification catalyst structure.
- the plate-like catalyst is made of a mesh of glass woven fabric reinforced with a metal lath or an inorganic binder, and contains titanium oxide as a main component, and vanadium, molybdenum and oxides of Z or tungsten as active components.
- the exhaust gas purifying catalyst structure according to (1) which is a molded article coated so as to embed the catalyst component thus obtained.
- the projections or peaks of the plate-like catalyst are provided at a predetermined angle to one side of the plate-like catalyst, and the bracket-like plate-like catalysts are alternately switched left and right via the mesh.
- the exhaust gas purifying catalyst structure according to any one of (1) to (6), which is laminated.
- An exhaust gas purifying catalyst structure disposed in a frame adapted to an exhaust gas flow path, wherein a pair of projections formed by alternately bending plate-shaped catalysts at predetermined intervals in opposite directions are formed at predetermined intervals.
- a plate-like catalyst having a large number of layers and a gas, metal, ceramic or glass-made gas dispersion in which linear, band-like, or rod-like materials are arranged in parallel at predetermined intervals
- An exhaust gas purifying catalyst structure comprising:
- the catalyst plate has a mesh of glass woven fabric reinforced with a metal lath or an inorganic binder, titanium oxide as a main component, and vanadium, molybdenum and / or tungsten oxide added as an active component.
- the exhaust gas purifying catalyst structure according to (1) which is a molded body coated so as to embed a catalyst component.
- the projections or peaks of the plate-like catalyst are provided at a predetermined angle to one side of the plate-like catalyst, and the bracket-like plate-like catalyst is inserted alternately left and right via the gas dispersion.
- the catalyst structure according to any one of (9) to (15), which is provided alternately.
- FIG. 1 is a cross-sectional view of a plate catalyst used in the present invention.
- FIG. 2 is a perspective view of an exhaust gas purifying catalyst structure of the present invention using a mesh as a gas dispersion.
- FIG. 3 is a diagram showing a dimensional relationship of a plate catalyst used in an example of the present invention.
- FIG. 4 is a perspective view of an exhaust gas purifying catalyst structure of the present invention using a rod-shaped material as a gas dispersion.
- FIG. 5 is a plan view showing examples (a) to (d) of the gas dispersion used in the present invention.
- FIG. 6 is an explanatory diagram showing a usage example of the gas dispersion of the present invention.
- the catalyst structure of the present invention includes a plate-like catalyst having a large number of protrusions or peaks and valleys formed by alternately bending plate-like catalysts at predetermined intervals in the opposite direction, a net-like material, or a linear or band-like catalyst. Alternatively, it is formed by alternately laminating a large number of rod-shaped gas dispersions.
- FIG. 1 is a cross-sectional view of a typical plate catalyst used in the present invention.
- (a) is a plate-like catalyst 1 in which flat portions 2 and protrusions 3 are alternately provided
- (b) is a corrugated plate-like shape in which peaks 4 and valleys 5 are provided at predetermined intervals.
- 1 shows Catalyst 1.
- the protrusion 3 in FIG. 1 (a) has a W-shaped cross section, but may have a Z-shaped cross section.
- a V-shaped protrusion may be provided in addition to the rounded cross-sectional protrusions (peaks) shown in FIG. 1 (b).
- FIG. 2 is a perspective view showing a catalyst structure 8 of the present invention formed by alternately stacking a plate-like catalyst 1 having a Z-shaped cross-section projection 3 and a metal mesh 7.
- the catalyst structure 8 is housed in an appropriate frame, and is disposed, for example, in an exhaust gas flow path of a denitration apparatus such that the length direction of the projection 3 is parallel to the flow direction 6 of the exhaust gas.
- the plate catalyst is, for example, a catalyst paste containing titanium oxide as a main component and an oxide of one or more metals selected from vanadium (V), molybdenum (Mo) and tungsten (W).
- V vanadium
- Mo molybdenum
- W tungsten
- Use well-known means such as adding inorganic fibers and binders to the catalyst paste.
- the catalyst substrate for example, a metal substrate having a through-hole such as a metal wire mesh or a metal lath, a woven fabric made of a ceramic or glass twisted inorganic fiber yarn, or impregnated or coated with an inorganic binder In this case, a material that has been strengthened to have rigidity is used.
- the mesh size of the base material is preferably large as long as the strength at the time of lamination permits.
- a metal or inorganic fiber mesh material surface on which a catalyst component is supported and coated so as not to block the through holes of the mesh can be used.
- the metal lath is a staggered cut having a predetermined length at a predetermined interval in a metal plate, and the metal plate is stretched in a direction perpendicular to the cut direction, so that the cut is deformed and penetrates the front and back. It refers to a metal plate on which many holes are formed.
- a plate-shaped catalyst obtained by applying a catalyst component to a metal substrate, a ceramic substrate, or the like is machined by a roller press, a flat press, or the like. It is possible to use a method of plastically deforming into a predetermined shape by using an apparatus, a method of forming the sheet by using a pressing apparatus having heating means, and a method of forming the sheet by simultaneously deforming and drying.
- the dimensions of the plate-shaped catalyst for molding are not limited at all.For example, in the case of a denitration catalyst having a W-shaped projection, the thickness is 0.5 to 2 mm, and the length of the flat plate portion is 10 to 10 mm. 100 mm, and the height of the protrusion is 1 to 10 mm.
- the method of laminating the plate-like catalyst 1 and the mesh material 7 is not particularly limited, and as shown in FIG. 2, the plate-like catalyst was formed such that the projections 3 were parallel to one side of the plate-like catalyst.
- a plate catalyst in which the protrusion 3 is inclined at a predetermined angle (for example, 30 °) with respect to one side of the plate catalyst 1 Alternatively, the left and right sides may be alternately stacked.
- the plate-shaped catalysts do not directly overlap each other, so even if plate-shaped catalysts of the same shape are used, the peaks must be sequentially shifted and stacked. And facilitates assembly of the catalyst structure.
- the gas stirring effect of the mesh material is exhibited, thereby increasing the catalytic reaction efficiency.
- Gases that are generally parallel to the gas flow In a catalyst structure having a flow path, the gas flow flowing through the flow path forms a laminar flow, and the speed at which the target component in the center of the flow path diffuses to the catalyst surface is significantly slowed down. Since the mesh is arranged so as to block the center of the gas flow channel where the diffusion speed is slow, the gas flow in the center of the gas flow channel is disturbed by the vortex formed by the unevenness of the mesh surface and the mesh. Diffusion of the target component to the catalyst surface is dramatically improved.
- the present invention extremely high catalytic performance can be obtained even with the same amount of catalyst.
- the ⁇ -shaped catalysts arranged above and below the reticulated material are different in shape or one of the same shape, only one of them is inverted or alternately turned left and right, the gas flow direction flowing through the gas flow path Since the gas is different between the front and back of the mesh, the gas stirring effect is further increased, and high catalytic performance can be obtained.
- FIG. 4 shows that a plurality of metal rod-shaped gas dispersions 10 are arranged in parallel at predetermined intervals in the direction perpendicular to the exhaust gas flow direction 6 in place of the mesh 7 used in the catalyst structure of FIG. Shown below is the catalyst structure 8.
- the gas dispersion 10 may be in the form of a rod, a line, a strip, or the like.
- the pressure loss could not be adjusted depending on the exhaust gas conditions, and the allowable range at the time of design was small, but with the catalyst structure shown in Fig. 4,
- the pressure loss can be freely controlled.
- the gas dispersion can be widened, for example, by increasing the interval between the bodies to suppress the increase in pressure loss.
- the manufacturing cost of the apparatus can be reduced.
- the installation width of the gas dispersion is sufficiently wide, even if dust accumulates on the gas dispersion, gas flowing around the dispersion will accumulate. Since dust is dropped, more than a certain amount is not accumulated, and the gas dispersion effect can be prevented from decreasing.
- a heavy metal is used as the base material of the plate catalyst, it is desirable to use a gas dispersion having sufficient strength, but as shown in FIG. By locating the gas dispersion 10 on the line connecting the contact points, the catalyst structure can be strengthened.
- 5 (a) to 5 (d) show various examples of the gas dispersion 10 used in the present invention. It is a top view.
- the arrangement interval of the gas dispersion may be equal or irregular, and as shown in Figs. 5 (c) and 5 (d), a long rod May be integrated to form a single body, or a structure in which the gas dispersion is partially or entirely extended. Further, the shape and material of the gas dispersion may be the same or different.
- the cross-sectional shape of the gas dispersion 10 may be a circle, an ellipse, a hexagon, or a hollow shape, but the cross-sectional shape of the gas dispersion is not particularly limited in the present invention.
- the gas dispersion 10 is basically arranged in a direction perpendicular to the gas flow direction, but may be arranged slightly above and below the plate catalyst.
- the material of the gas dispersion examples include metal, ceramic, glass and the like, but the material of the gas dispersion is not particularly limited in the present invention.
- the thickness of the gas dispersion the thicker the gas dispersion, the stronger the strength of the structure becomes.
- the thickness of the gas dispersion is not particularly limited.
- the length of the gas dispersion is not particularly limited as long as it is a length that crosses the gas flow path in the catalyst in the width direction.
- gas dispersion may be coated with a catalyst component, an inorganic binder and Z or a reinforcing liquid.
- E-glass fiber with a fiber diameter of 9 m, 140 twisted yarns, 10 strands Z25.4 Plain weave with a roughness of 5.4 mm, titania 40%, silica sol 20%, polyvinyl alcohol 1%
- the slurry was impregnated with the slurry and dried at 150 ° C. to give rigidity to obtain a catalyst substrate.
- a specific surface area of about 2 7 Om 2 titanium oxide Zg 1. 2 kg in motor Ribuden acid Anmoniumu ((NH 4) 6 ⁇ Mo 7 0 24 ⁇ 4 ⁇ 2 0) to 0. 2 5 kg Then, 0.23 kg of ammonium metavanadate and 0.3 kg of oxalic acid, and 8 wt% of 20 wt% silica sol as Si 02 were added and kneaded while adding water to form a paste. In addition to this, kaolin-based inorganic fiber (Kao wool) 15wt % And further kneaded to obtain a paste having a water content of 30.5%.
- Kao wool kaolin-based inorganic fiber
- the above paste is placed between two previously prepared catalyst substrates having a width of 50 O mm, and is applied to the mesh and the surface of the mesh with a pair of rolling rollers, and then cut to a length of 48 O mm.
- a 0.7 mm thick plate catalyst was obtained.
- a catalyst (hereinafter, also referred to as a catalyst element) was obtained.
- a large number of the obtained catalyst elements were laminated via a net-like material obtained by cutting the rigid E glass fiber woven fabric used as a base material of the catalyst element into a square of 480 squares,
- the catalyst laminate was assembled in a metal frame, and calcined at 500 ° C. for 2 hours with ventilation to obtain a catalyst structure.
- Metatitanic acid slurry (T i 0 2 content: 3 0 wt%, S 0 4 content: 8 wt%) 6 7 kg in the main evening tungstate Anmoniumu ((NH 4) 6 ⁇ ⁇ 2 W 12 0 4 o • 2 3 H 2 0) to 3. 8 kg, main evening Anmoniumu vanadate a (NH 4 V0 3) 1. 2 8 kg was added and kneaded while evaporating water with a heating kneader, water about 3 6% I got a paste. This was extruded and granulated into a column having a diameter of 3 °, dried with a fluidized bed drier, and then fired at 250 ° C in the air for 2 hours.
- the obtained granules were ground with a hammer mill to an average particle size of 5 m.
- This catalyst paste is applied to the gap between the laths and the surface of a SUS304 metal lath substrate with a width of 490 mm and a thickness of 0.2 mm using a roller press to form a catalyst with a thickness of about 0.9 mm. I got an element.
- the obtained catalyst element was cut into 480 square metal lath substrates, each of which was used as a catalyst base material, and cut into squares to form a catalyst laminate.
- the catalyst was assembled in a metal frame and calcined at 500 ° C. for 2 hours with ventilation to obtain a catalyst structure of Example 2.
- Titanium oxide 1 having a specific surface area of about 2 7 0 m 2 Z g. 2 kg molybdate
- Anmoniu beam a ((NH 4) 6 ⁇ M o 7 0 2 4 ⁇ 4 H 2 0) 0. 2 5 kg, metavanadate 0.23 kg of ammonium and 0.3 kg of oxalic acid were added to water and kneaded to form a clay-like material, which was then formed into a 30-column shape by an extrusion granulator. After drying the compact, it was baked at 550 ° C for 2 hours and pulverized with a fine pulverizer to obtain a catalyst powder having particles of 1 // m or less and 60% or more.
- a catalyst structure was obtained in the same manner as in Examples 1 and 2 except for the above, and was used as a catalyst structure of Comparative Examples 1 and 2.
- the above-described embodiment is the same as the above-described embodiment except that a protruding portion-inclined element whose protruding portion is inclined by 30 degrees with respect to one end side of the catalyst element is used as the catalyst element and the element is alternately inverted.
- the same reticulated material was sandwiched between layers to obtain a catalyst structure of Example 5.
- Example 5 The protrusion inclination element used in Example 5 and the catalyst element 1 used in Example 1 were alternately used, and a large number of these were laminated while interposing the same mesh material as in Example 1 between them.
- the catalyst structure of Example 6 was obtained.
- Examples 1 and 2 are compared with Examples 3 and 4, Examples 3 and 4 show that By using a mesh material coated with a catalyst, the catalyst is located in the gas flow path having the largest gas stirring effect, and the catalyst performance was improved more than in Examples 1 and 2.
- the denitration performance was further improved by using the catalyst element whose projections were inclined by a predetermined angle.
- the gas flow path is crushed or disturbed by a simple method of stacking plate-like catalysts having protrusions or peaks and valleys via a plate-like mesh. Not only does this not only result in a high-strength catalyst structure, but also greatly improves catalyst performance.
- Anmoniumu molybdate ((NH 4) 6 ⁇ Mo 7 0 2 4 H 2 0) to 0.2 5 kg, metavanadate en Moniumu 0.2 3 kg, 0.3 kg of oxalic acid, and 8 wt% of 20 wt% silk sol as Si 02 were added, and kneaded while adding water to form a paste.
- the paste is placed between two previously prepared base materials having a width of 500 mm, applied between meshes and a mesh surface with a pair of rolling rollers, and then cut to a length of 480 mm to obtain a thickness of 0.7.
- a mm plate catalyst was obtained.
- the obtained catalyst plate was sandwiched between heating molds and dried to form a catalyst plate having the same cross-sectional shape as in Example 1.
- Reference example 1 A woven fabric made by plain weaving 140 yarns of E glass fiber with a fiber diameter of 9 // m with a roughness of 10 yarns / inch, impregnated with a slurry of 20% titania 40 silica sol and 1% polyvinyl alcohol Then, it was dried at 150 ° C. to give it rigidity and cut into 48 mm square to obtain a woven fabric having a thickness of 2 mm.
- a molded body alternately laminated with the catalyst plate of Example 7 was assembled in a metal frame, and the temperature was raised to 500 ° C. with ventilation. For 2 hours to obtain a catalyst structure.
- Titanium oxide powder (T i 0 2), metatungstate Anmoniumu ((NH 4) 6 [H 2 W12O 40)), metavanadate Anmoniumu (NH 4 CV O 3]) solution T i ZW / V molar ratio 8 9
- 30 wt% of water was added to the titanium oxide, and the mixture was kneaded with a kneader for 30 minutes, and then 25 wt% of the raw material titanium oxide was kneaded.
- Kao wool was added, and the paste after kneading for 30 minutes was applied to a lath plate having a width of 500 mm and a thickness of 0.8 mm to obtain a plate catalyst.
- This catalyst was press-molded and cut into 480 squares to obtain a catalyst plate having a cross-sectional shape shown in FIG.
- a 0.7 mm diameter brass wire was cut at 550 mm each. These were placed on the catalyst plate at an interval of 20 mm in width, and the catalyst plate was further stacked on top of it to form the shape shown in Fig. 6. . At this time, the wires were arranged at right angles to the gas flow direction. This was calcined at 500 ° C. for 2 hours while ventilating to obtain a catalyst structure.
- Example 7 The wire used in Example 7 was immersed in the catalyst slurry obtained by the above method, pulled up, and dried to obtain a wire having a catalyst component coated on the surface.
- a catalyst structure shown in FIG. 4 was obtained in the same manner as in Example 7, except that these wires were used instead of the wires used in Example 7.
- the catalyst structure was prepared in the same manner as in Example 7, except that the installation width of the wire was changed to 40 mm and 80 mm.
- Table 3 shows the results of comparing the number of used catalyst plates between Example 7 and Reference Example 1.
- Example 7 using the wire has a smaller number of catalyst plates and higher strength.
- Example 7 Comparing the test results of Example 7, Reference Example 1, and Example 10 in Table 5, it can be seen that although the area-based overall reaction rate constants are almost equal, Example 7 in which the wire installation width is 10 mm was used. In Example 10, the pressure loss was larger than in Reference Example 1 using a mesh, but it was found that in Example 10 in which the wire installation width was adjusted to 40 mm, the pressure loss could be reduced more than in Reference Example 1. However, a comparison of these results with the results of Example 11 shows that there is a limit to the wire installation width that can maintain the area-based overall reaction rate constant. In addition, a comparison between Example 7 and Example 9 shows that the wire supporting the catalyst component is highly effective in increasing the area-based overall reaction rate constant.
- a plate-like catalyst having projections or peaks and valleys is laminated via a mesh having a large number of holes penetrating on the front and back sides. Since the plate catalysts do not come into direct contact with each other, a catalyst structure can be manufactured using a single plate catalyst. Therefore, the manufacturing process can be simplified, the manufacturing cost can be reduced, and the strength can be improved by preventing the gas flow path from being deformed. In addition, since the mesh is located almost at the center of the gas flow path, The gas diffusion rate is improved and high catalytic performance is exhibited, and the exhaust gas purification rate, for example, the denitration rate is improved.
- the plate-like catalyst is formed into a molded body obtained by applying a denitration catalyst component to a mesh of glass woven fabric reinforced with a metal lath or an inorganic binder.
- the surface area of the plate catalyst is increased to improve the contact efficiency with the target component (NO x), and the mechanical strength of the plate catalyst is increased. It will be good.
- the mechanical strength of the catalyst structure is further improved in addition to the effect of the above invention.
- the reticulated material is a glass fiber woven fabric reinforced by impregnating with an inorganic binder such as silica and titania.
- the strength of the plate catalyst can be improved, and the weight can be reduced.
- the catalyst component is supported on the surface of the mesh material, so that the catalytic reaction efficiency is further improved in addition to the effect of the above invention.
- the denitration efficiency is further improved in addition to the effect of the above invention.
- all or a part of the projections or peaks of the plate-like catalyst is formed or formed so as to have a predetermined angle with the flow direction of the gas to be treated.
- the gas stirring effect is increased and the catalytic reaction efficiency is further improved.
- the linear, band-like, or rod-shaped gas dispersion provided in the catalyst structure is freely changed in the installation width, so that the catalyst dispersion can be laminated with a narrow-pitch catalyst plate.
- an increase in pressure loss of the structure obtained as described above can be suppressed.
- dust accumulation can be prevented by properly controlling the installation width of the gas dispersion, so that the effect of disturbing gas can be maintained.
- the use of a gas dispersion having sufficiently high strength can prevent the gas flow passage from flattening and suppress a rise in pressure loss. For this reason, a highly efficient and compact exhaust gas purifying apparatus can be provided.
- the catalyst structure of the present invention is used for an exhaust gas purification device such as an exhaust gas denitration device, and is used for purification of waste gas discharged from power plants, various factories, automobiles, and the like.
- an exhaust gas conversion catalyst structure that is disposed in an exhaust gas flow path and promotes purification of exhaust gas, it is made of metal, ceramic, or glass having a plate-shaped catalyst 1 and a large number of holes that penetrate on both sides.
- the body and the body are alternately laminated W MMG layer DNTADHNERERRRESPSBELP1 to disturb the exhaust gas flow in the gas flow path
- An exhaust gas purifying catalyst structure disposed in a frame adapted to an exhaust gas channel, wherein the catalyst structure is formed by projecting a plate-like catalyst by alternately bending the plate-like catalyst in opposite directions at predetermined intervals; Or an exhaust gas purification system consisting of a stack of plate catalysts with many peaks and valleys and a gas dispersion made of metal, ceramic or glass mesh with many through holes on both sides. Catalyst structure.
- the plate-shaped catalyst is made of a mesh of glass woven fabric reinforced with a metal lath or an inorganic binder. Titanium oxide is the main component, and vanadium, molybdenum and oxides of Z or tungsten are added as active components. 2.
- the projections or peaks of the catalyst element are provided at a predetermined angle with respect to one side of the plate-shaped catalyst, and the force and the plate-shaped catalyst are alternately switched left and right via the mesh. 7.
- An exhaust gas purifying apparatus provided with the catalyst structure according to any one of claims 1 to 7 in an exhaust gas channel.
- An exhaust gas purifying catalyst structure disposed in a frame adapted to an exhaust gas flow path, wherein a pair of protrusions formed by alternately bending plate-shaped catalysts at predetermined intervals in opposite directions are formed at predetermined intervals. And a gas dispersion in which metal, ceramic or glass, linear, band-like, or rod-like materials are arranged in parallel at predetermined intervals.
- Exhaust gas purification catalyst structure composed of layers stacked on each other.
- the catalyst plate has a mesh of glass woven fabric reinforced with a metal lath or an inorganic binder, and contains titanium oxide as a main component, and vanadium, molybdenum and an oxide of Z or tungsten as an active component.
- catalyst component carried on the surface of the gas dispersion is an oxide of one or more metals selected from titanium, vanadium, molybdenum, and tungsten. .
- the projections or peaks of the plate-shaped catalyst are provided at a predetermined angle with respect to one side of the plate-shaped catalyst, and the bracket-shaped plate-shaped catalyst is alternately inserted into the left and right via the gas dispersion.
- the catalyst structure c according to any one of claims 9 to 15, which is provided alternately.
- An exhaust gas purifying apparatus provided with the catalyst structure according to any one of claims 9 to 16 in an exhaust gas channel.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99943242A EP1116512A4 (en) | 1998-09-09 | 1999-09-09 | CATALYTIC STRUCTURE FOR CONTROLLING EXHAUST EMISSIONS AND RELATED DEVICE |
AU56483/99A AU761031B2 (en) | 1998-09-09 | 1999-09-09 | Exhaust emission control catalyst structure and device |
US09/763,779 US6710013B1 (en) | 1998-09-09 | 1999-09-09 | Exhaust emission control catalyst structure |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25544798 | 1998-09-09 | ||
JP10/255447 | 1998-09-09 | ||
JP1461799 | 1999-01-22 | ||
JP11/14617 | 1999-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000013775A1 true WO2000013775A1 (fr) | 2000-03-16 |
Family
ID=26350594
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/004909 WO2000013775A1 (fr) | 1998-09-09 | 1999-09-09 | Structure catalytique permettant de reguler les emissions d'echappement et dispositif s'y rapportant |
Country Status (7)
Country | Link |
---|---|
US (1) | US6710013B1 (ja) |
EP (1) | EP1116512A4 (ja) |
KR (1) | KR100674348B1 (ja) |
CN (1) | CN1154531C (ja) |
AU (1) | AU761031B2 (ja) |
TW (1) | TWI224023B (ja) |
WO (1) | WO2000013775A1 (ja) |
Cited By (1)
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US9724683B2 (en) | 2012-07-18 | 2017-08-08 | Mitsubishi Hitachi Power Systems, Ltd. | Catalyst structure |
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WO2009062233A1 (en) * | 2007-11-12 | 2009-05-22 | Impulse Engine Technology Pty Limited | Muffler |
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JP2011189262A (ja) * | 2010-03-15 | 2011-09-29 | Babcock Hitachi Kk | 二酸化炭素回収装置からの排ガスの処理方法及び装置 |
EP2591845B1 (en) * | 2010-07-08 | 2015-03-04 | Mitsubishi Hitachi Power Systems, Ltd. | Flue gas denitrification system |
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JP6574591B2 (ja) * | 2015-03-31 | 2019-09-11 | 日立造船株式会社 | 触媒処理装置およびその製造方法 |
US9802157B2 (en) | 2015-08-05 | 2017-10-31 | Caterpillar Inc. | Diffuser plate for an exhaust aftertreatment module |
KR101659818B1 (ko) * | 2015-09-30 | 2016-09-27 | 주식회사 나노 | 평판형 선택적촉매환원 촉매 제조방법 및 이를 통해 제조된 평판형 선택적촉매환원 촉매 |
RU2630825C1 (ru) * | 2016-08-02 | 2017-09-13 | Игорь Михайлович Тушканов | Каталитический узел для термокаталитической очистки газовых выбросов в химических процессах |
CN107261834A (zh) * | 2017-07-14 | 2017-10-20 | 北京大爱乾坤环卫设备有限公司 | 光催化空气处理管道 |
CN109954323B (zh) * | 2017-12-25 | 2020-07-10 | 国家电投集团远达环保工程有限公司重庆科技分公司 | 一种高温脱硝除尘一体化装备 |
JP7244444B2 (ja) * | 2020-01-28 | 2023-03-22 | 三菱重工業株式会社 | 脱硝触媒構造体 |
US20210381771A1 (en) * | 2020-04-23 | 2021-12-09 | Brentwood Industries, Inc. | Drift eliminator and method of making |
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- 1999-09-09 WO PCT/JP1999/004909 patent/WO2000013775A1/ja active IP Right Grant
- 1999-09-09 CN CNB998107107A patent/CN1154531C/zh not_active Expired - Fee Related
- 1999-09-09 TW TW088115705A patent/TWI224023B/zh not_active IP Right Cessation
- 1999-09-09 KR KR1020017003012A patent/KR100674348B1/ko not_active IP Right Cessation
- 1999-09-09 US US09/763,779 patent/US6710013B1/en not_active Expired - Fee Related
- 1999-09-09 EP EP99943242A patent/EP1116512A4/en not_active Withdrawn
- 1999-09-09 AU AU56483/99A patent/AU761031B2/en not_active Ceased
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Also Published As
Publication number | Publication date |
---|---|
TWI224023B (en) | 2004-11-21 |
EP1116512A4 (en) | 2004-07-14 |
US6710013B1 (en) | 2004-03-23 |
CN1154531C (zh) | 2004-06-23 |
CN1316915A (zh) | 2001-10-10 |
KR100674348B1 (ko) | 2007-01-24 |
KR20010075009A (ko) | 2001-08-09 |
AU761031B2 (en) | 2003-05-29 |
EP1116512A1 (en) | 2001-07-18 |
AU5648399A (en) | 2000-03-27 |
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