WO1993002775A1 - Verfahren zur herstellung eines katalysators zur entfernung von stickstoffoxiden aus abgasen - Google Patents
Verfahren zur herstellung eines katalysators zur entfernung von stickstoffoxiden aus abgasen Download PDFInfo
- Publication number
- WO1993002775A1 WO1993002775A1 PCT/EP1992/001747 EP9201747W WO9302775A1 WO 1993002775 A1 WO1993002775 A1 WO 1993002775A1 EP 9201747 W EP9201747 W EP 9201747W WO 9302775 A1 WO9302775 A1 WO 9302775A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- catalyzer
- waste gas
- nitrogen oxides
- producing
- mixed solution
- Prior art date
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000002912 waste gas Substances 0.000 title abstract 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 239000012159 carrier gas Substances 0.000 claims abstract 2
- 239000003054 catalyst Substances 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/06—Washing
-
- 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
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
Definitions
- the invention relates to a process for producing a catalyst for removing nitrogen oxides from exhaust gases with the addition of ammonia, the catalyst consisting of a carbon-containing material which is mixed with a mixed solution of 5 to 20%, in particular 5 to 15%, HCl and 1 to Treated 8%, in particular 2 to 4% HNO 3 with a contact time of 5 to 60 min and after draining the mixed solution at 200 ° C or higher in an N 2 stream and using the exhaust gas from the N 2 treatment is condensed and recycled.
- the catalysts produced by this process known from DE 40 26 104 C1
- quite favorable levels of NO x conversion can already be achieved, although in individual cases NH 3 residues can still occur in the exhaust gas.
- the invention is, starting from a method of the initially mentioned type, the object to further develop this method of manufacture to the extent that the effectiveness of the catalyst of carbonaceous material humbich the recoverable NO x -Umsatzgrades is further improved and a NH 3 - Rest in the exhaust gas be avoided.
- the NO x conversion rate can be increased further with these catalysts.
- Tables 1 to 3 show experimental results which show the further improved effectiveness of catalysts prepared according to the invention in the reduction of nitrogen oxides by means of NH 3 from the exhaust gases from coal-fired power plants, from waste-to-energy plants and from earth rehabilitation plants.
- catalysts were used which were prepared from activated carbons of the applicant's specification D52 / 4 by treatment with a mixed solution of a 10% HCl solution and a 4% HNO 3 solution.
- Table 1 shows that when NO is removed from the exhaust gases from coal-fired power plants by means of catalysts which have additionally been exposed to gaseous NH 3 after treatment with mixed solution, an increase in NO conversion compared to catalysts which have only been treated with the mixed solution of approx. 68 to approx. 71 or from approx. 71 to approx. 77% has been achieved with zero ammonia hatching at the same time.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19914125913 DE4125913C1 (enrdf_load_stackoverflow) | 1991-08-05 | 1991-08-05 | |
| DEP4125913.0 | 1991-08-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1993002775A1 true WO1993002775A1 (de) | 1993-02-18 |
Family
ID=6437734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1992/001747 WO1993002775A1 (de) | 1991-08-05 | 1992-08-01 | Verfahren zur herstellung eines katalysators zur entfernung von stickstoffoxiden aus abgasen |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE4125913C1 (enrdf_load_stackoverflow) |
| WO (1) | WO1993002775A1 (enrdf_load_stackoverflow) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0210392A2 (de) * | 1985-06-29 | 1987-02-04 | Steag Ag | Verfahren zur Abscheidung von NOx aus Gasen, insbesondere Rauchgasen |
| DE3620425C1 (de) * | 1986-06-18 | 1987-06-19 | Bergwerksverband Gmbh | Verfahren zur Herstellung eines Aktivkohlekatalysators |
| WO1990006803A1 (de) * | 1988-12-17 | 1990-06-28 | Bergwerksverband Gmbh | Verfahren zur herstellung eines katalysators zur entfernung von stickstoffoxiden aus abgasen |
| DE3915416A1 (de) * | 1989-05-11 | 1990-11-15 | Betr Forsch Inst Angew Forsch | Verfahren und vorrichtung fuer die chemische rauchgasbehandlung |
| DE4026104C1 (en) * | 1990-08-17 | 1992-02-13 | Bergwerksverband Gmbh, 4300 Essen, De | Nitrogen oxide(s) removal from waste gases - by using and carbon-contg. catalyst treated with e.g. hydrochloric acid |
-
1991
- 1991-08-05 DE DE19914125913 patent/DE4125913C1/de not_active Expired - Lifetime
-
1992
- 1992-08-01 WO PCT/EP1992/001747 patent/WO1993002775A1/de active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0210392A2 (de) * | 1985-06-29 | 1987-02-04 | Steag Ag | Verfahren zur Abscheidung von NOx aus Gasen, insbesondere Rauchgasen |
| DE3620425C1 (de) * | 1986-06-18 | 1987-06-19 | Bergwerksverband Gmbh | Verfahren zur Herstellung eines Aktivkohlekatalysators |
| WO1990006803A1 (de) * | 1988-12-17 | 1990-06-28 | Bergwerksverband Gmbh | Verfahren zur herstellung eines katalysators zur entfernung von stickstoffoxiden aus abgasen |
| DE3915416A1 (de) * | 1989-05-11 | 1990-11-15 | Betr Forsch Inst Angew Forsch | Verfahren und vorrichtung fuer die chemische rauchgasbehandlung |
| DE4026104C1 (en) * | 1990-08-17 | 1992-02-13 | Bergwerksverband Gmbh, 4300 Essen, De | Nitrogen oxide(s) removal from waste gases - by using and carbon-contg. catalyst treated with e.g. hydrochloric acid |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4125913C1 (enrdf_load_stackoverflow) | 1993-01-07 |
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