CA2055114A1 - Process for separating ammonia from gases in particular the exhaust gases generated by combustion processes - Google Patents
Process for separating ammonia from gases in particular the exhaust gases generated by combustion processesInfo
- Publication number
- CA2055114A1 CA2055114A1 CA002055114A CA2055114A CA2055114A1 CA 2055114 A1 CA2055114 A1 CA 2055114A1 CA 002055114 A CA002055114 A CA 002055114A CA 2055114 A CA2055114 A CA 2055114A CA 2055114 A1 CA2055114 A1 CA 2055114A1
- Authority
- CA
- Canada
- Prior art keywords
- ammonia
- exhaust gases
- gas
- added
- generated
- 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.)
- Abandoned
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 33
- 239000007789 gas Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims abstract description 5
- 239000000446 fuel Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 235000012501 ammonium carbonate Nutrition 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 239000001166 ammonium sulphate Substances 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- ZETCGWYACBNPIH-UHFFFAOYSA-N azane;sulfurous acid Chemical compound N.OS(O)=O ZETCGWYACBNPIH-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 238000005200 wet scrubbing Methods 0.000 description 1
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
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
- Incineration Of Waste (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
ABSTRACT
In a process for separating ammonia from gases, in particular from the exhaust gases generated by combustion process, in which the ammonia is either formed or generated, or in which ammonia or a substance that forms ammonia under the effects of temperature, is introduced, a substance from the group of zeoliths is added in finely divided form to the gas that is to be purified as a treatment medium, this being done by thorough mixing with the gas. The compounds that are added have the advantage that they not only remove the ammonia from the exhaust gases very effectively by absorption, but can bind it very strongly in their internal structure, which effectively avoids the renewed release of the ammonia during final disposal.
In a process for separating ammonia from gases, in particular from the exhaust gases generated by combustion process, in which the ammonia is either formed or generated, or in which ammonia or a substance that forms ammonia under the effects of temperature, is introduced, a substance from the group of zeoliths is added in finely divided form to the gas that is to be purified as a treatment medium, this being done by thorough mixing with the gas. The compounds that are added have the advantage that they not only remove the ammonia from the exhaust gases very effectively by absorption, but can bind it very strongly in their internal structure, which effectively avoids the renewed release of the ammonia during final disposal.
Description
2~5~
The present invention relates to a process for separating ammonia from gases, in particular from the exhaust gases generated by combustion process, in which the ammonia is either formed or generated, or in which ammonia or a substance that forms ammonia under the effects of temperature, i5 introduced.
During the treatment of exhaust gases that result from combustion processes, in order to reduce the concentrations of nitrous oxide, either ammonia or a reduction catalyst is added to the flow of gas (SCR process), or else ammonia or a substance that forms ammonia under the effects of temperature (e.g., urea, ammonium carbonate [sal volatile]) is sprayed into the gas ~`low at a temperature range that is above 700 degrees Centigrade (SNCR
process). In both cases, the ammonia that is not used up during the process that reduces the NOx can be carrled out in the exhaust gases in the form of so-called ammonia slip [Ammoniakschlup~--Tr.]. This contaminates not only the atmosphere, but also any subsequent exhaus~-gas puri~ication systems, if ammonia or ammonia compounds (ammonium chloride, ammonium sulphate, ammonium bisulphite) are flush~d out with the dust from a filter system or in the waste water from a wet-scrubbing system.
It is true that the above-mentioned ammonium salts, which are formed in the exhaust-gas section at temperatures in excess of 300 degrees Centigrade, can be removed effectively with cloth fil~ers; however, problems are encountered when such filter dusts are subjected to further processing. If they are eventually wetted with water, the ammonia is driven off once again in gaseous form and then escapes to the atmosphere, or waste water that contains ammonium salt will be formed as seepage water in a dump. This means that hazard-free ultimate disposal of this dust becomes con;ectural.
.
2~
It is the task of the present invention to describe a process by which ammonia can be removed from gas that is to be purified, this being done in such a manner that the substance that either absorbs or binds the ammonia can be disposed of without risk and without the ammonia escapinq once again.
This task has been solved by the measures described in claim 1 or in claim 2. When this is done, the treatment medium can be introduced either as a solid or in the form of a suspension. If the exhaust gases that are generated in combustion processes are to be purified, it is po6sible to either introduce the treatment medium into the exhaust gases Pither in finely divided form, or mix it directly into the fuel, when the desired reaction, which leads to the binding of the ammonia, can start as early as the time when the ammonia is formed.
The compounds that are proposed possess the advantage that they not only absorb the ammonia from the exhaust ~ases very well, but can also bind it very strongly in their internal structure. This effectively avoids the above-discussed environmental hazards that are caused by subsequent liberation of the ammonia.
, ~ . :
The present invention relates to a process for separating ammonia from gases, in particular from the exhaust gases generated by combustion process, in which the ammonia is either formed or generated, or in which ammonia or a substance that forms ammonia under the effects of temperature, i5 introduced.
During the treatment of exhaust gases that result from combustion processes, in order to reduce the concentrations of nitrous oxide, either ammonia or a reduction catalyst is added to the flow of gas (SCR process), or else ammonia or a substance that forms ammonia under the effects of temperature (e.g., urea, ammonium carbonate [sal volatile]) is sprayed into the gas ~`low at a temperature range that is above 700 degrees Centigrade (SNCR
process). In both cases, the ammonia that is not used up during the process that reduces the NOx can be carrled out in the exhaust gases in the form of so-called ammonia slip [Ammoniakschlup~--Tr.]. This contaminates not only the atmosphere, but also any subsequent exhaus~-gas puri~ication systems, if ammonia or ammonia compounds (ammonium chloride, ammonium sulphate, ammonium bisulphite) are flush~d out with the dust from a filter system or in the waste water from a wet-scrubbing system.
It is true that the above-mentioned ammonium salts, which are formed in the exhaust-gas section at temperatures in excess of 300 degrees Centigrade, can be removed effectively with cloth fil~ers; however, problems are encountered when such filter dusts are subjected to further processing. If they are eventually wetted with water, the ammonia is driven off once again in gaseous form and then escapes to the atmosphere, or waste water that contains ammonium salt will be formed as seepage water in a dump. This means that hazard-free ultimate disposal of this dust becomes con;ectural.
.
2~
It is the task of the present invention to describe a process by which ammonia can be removed from gas that is to be purified, this being done in such a manner that the substance that either absorbs or binds the ammonia can be disposed of without risk and without the ammonia escapinq once again.
This task has been solved by the measures described in claim 1 or in claim 2. When this is done, the treatment medium can be introduced either as a solid or in the form of a suspension. If the exhaust gases that are generated in combustion processes are to be purified, it is po6sible to either introduce the treatment medium into the exhaust gases Pither in finely divided form, or mix it directly into the fuel, when the desired reaction, which leads to the binding of the ammonia, can start as early as the time when the ammonia is formed.
The compounds that are proposed possess the advantage that they not only absorb the ammonia from the exhaust ~ases very well, but can also bind it very strongly in their internal structure. This effectively avoids the above-discussed environmental hazards that are caused by subsequent liberation of the ammonia.
, ~ . :
Claims (5)
1. A process for separating ammonia from gases, in particular from the exhaust gases generated by combustion process, in which the ammonia is either formed or generated, or in which ammonia or a substance that forms ammonia under the effects of temperature is introduced, characterized in that a substance from the group of zeoliths is added in finely divided form to the gas that is to be purified as a treatment medium, this being done by thorough mixing with the gas.
2. A process for separating ammonia from gases, in particular from the exhaust gases generated by combustion processes, in which the ammonia is formed or liberated, on in which ammonia or a substance that forms ammonia under the effects of temperature, is added, characterized in that activated silicon dioxide is added in finely divided form to the gas that is to be purified as a treatment medium, this being done by thorough mixing with the gas.
3. A process a defined in claim 1 or claim 2, characterized in that the treatment medium is added in solid form.
4. A process as defined in claim 1 or claim 2, characterized in that the treatment medium is added in the form of a suspension.
5. A process as defined in one of the claims 1 to 4, for purifying the exhaust gases generated by combustion processes, characterized in that the treatment medium is mixed into the fuel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4035554A DE4035554A1 (en) | 1990-11-08 | 1990-11-08 | METHOD FOR SEPARATING AMMONIA FROM GASES, IN PARTICULAR EXHAUST GAS FROM COMBUSTION PROCESSES |
| DEP4035554.3 | 1990-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2055114A1 true CA2055114A1 (en) | 1992-05-09 |
Family
ID=6417889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002055114A Abandoned CA2055114A1 (en) | 1990-11-08 | 1991-11-07 | Process for separating ammonia from gases in particular the exhaust gases generated by combustion processes |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0484954B1 (en) |
| JP (1) | JPH04267926A (en) |
| AT (1) | ATE123964T1 (en) |
| BR (1) | BR9104855A (en) |
| CA (1) | CA2055114A1 (en) |
| DE (2) | DE4035554A1 (en) |
| DK (1) | DK0484954T3 (en) |
| ES (1) | ES2074628T3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100403244B1 (en) * | 2001-04-06 | 2003-10-23 | 대백신소재주식회사 | A method of ammonia gas purification for manufacturing highly pure nitrogen trifluoride |
| US8268333B2 (en) | 2001-04-24 | 2012-09-18 | Lintec Corporation | Orally administered agent and an orally administered agent/supporting substrate complex |
| JP4963372B2 (en) * | 2006-04-10 | 2012-06-27 | 株式会社豊田中央研究所 | REACTOR, REACTOR MANUFACTURING METHOD, AND REACTOR UNIT MEMBER |
| CN115463543B (en) * | 2022-07-28 | 2023-06-16 | 华电电力科学研究院有限公司 | Accurate ammonia system that spouts of coal-fired unit SCR denitration |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5248569A (en) * | 1975-10-16 | 1977-04-18 | Hokkaido Netsugaku:Kk | Process for deodorization |
| JPS5478362A (en) * | 1977-12-06 | 1979-06-22 | Mitsubishi Chem Ind Ltd | Removing method for sulfate adhered on air preheater |
| JPS5966330A (en) * | 1982-10-05 | 1984-04-14 | Mitsubishi Heavy Ind Ltd | Treatment of exhaust gas |
| DE3327961A1 (en) * | 1983-08-03 | 1985-02-21 | Kraftanlagen Ag, 6900 Heidelberg | Process for the elimination of noxious gases from exhaust gases |
| US4604110A (en) * | 1984-04-19 | 1986-08-05 | General Time Corporation | Filter element, filter, and method for removing odors from indoor air |
| DE3529272A1 (en) * | 1985-08-16 | 1987-02-19 | Bergwerksverband Gmbh | METHOD FOR SEPARATING SOLID AND GASEOUS POLLUTANTS FROM HOT GASES |
| US5013335A (en) * | 1987-06-30 | 1991-05-07 | Uop | Process for sequestering ammonia and the odor associated therewith |
| US4795482A (en) * | 1987-06-30 | 1989-01-03 | Union Carbide Corporation | Process for eliminating organic odors and compositions for use therein |
| DE3744388A1 (en) * | 1987-12-29 | 1989-07-13 | Basf Ag | METHOD FOR REMOVING NITROGEN OXIDES FROM EXHAUST GASES |
| DE3919124A1 (en) * | 1989-06-12 | 1990-01-18 | Haji Javad Mehdi Dr Ing | METHOD FOR SEPARATING POLYCYLCIC HYDROCARBONS AND HEAVY METALS FROM EXHAUST GASES |
-
1990
- 1990-11-08 DE DE4035554A patent/DE4035554A1/en active Granted
-
1991
- 1991-11-07 EP EP91119025A patent/EP0484954B1/en not_active Expired - Lifetime
- 1991-11-07 DK DK91119025.4T patent/DK0484954T3/en active
- 1991-11-07 JP JP3291549A patent/JPH04267926A/en active Pending
- 1991-11-07 ES ES91119025T patent/ES2074628T3/en not_active Expired - Lifetime
- 1991-11-07 AT AT91119025T patent/ATE123964T1/en not_active IP Right Cessation
- 1991-11-07 CA CA002055114A patent/CA2055114A1/en not_active Abandoned
- 1991-11-07 BR BR919104855A patent/BR9104855A/en not_active Application Discontinuation
- 1991-11-07 DE DE59105785T patent/DE59105785D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE4035554A1 (en) | 1992-05-14 |
| DK0484954T3 (en) | 1995-10-09 |
| ES2074628T3 (en) | 1995-09-16 |
| DE4035554C2 (en) | 1993-01-07 |
| JPH04267926A (en) | 1992-09-24 |
| ATE123964T1 (en) | 1995-07-15 |
| BR9104855A (en) | 1992-06-23 |
| EP0484954A1 (en) | 1992-05-13 |
| EP0484954B1 (en) | 1995-06-21 |
| DE59105785D1 (en) | 1995-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4767605A (en) | Method for separation of acid pollution gas | |
| CA2622064C (en) | Method of removing sulfur trioxide from a flue gas stream | |
| KR101165864B1 (en) | EMISSIONS TREATMENT SYSTEM AND METHOD FOR CONVERTING NOx IN EXHAUST GAS TO N2 | |
| EP0666099B1 (en) | Method of removing nitrogen oxides contained in exhaust gas | |
| KR890000512B1 (en) | How to remove nitrogen oxides and sulfur oxides from waste gas | |
| CA1255474A (en) | Process for the systematic treatment of exhaust gases | |
| US20030226352A1 (en) | Combatting air pollution | |
| JP3352494B2 (en) | Nitrogen oxide decomposition catalyst and denitration method using the same | |
| JPS5911329B2 (en) | How to remove nitrogen oxides and sulfur oxides from exhaust gas | |
| US5898015A (en) | Material for absorbing nitrogen oxides comprising hollandite-type complex oxide | |
| US4980137A (en) | Process for NOx and CO control | |
| JPS63171621A (en) | Method of purifying waste gas | |
| CA2055114A1 (en) | Process for separating ammonia from gases in particular the exhaust gases generated by combustion processes | |
| WO2006103040A1 (en) | Process for catalytic reduction of nox by ammonia in presence of so3 in the gas | |
| EP0937500A4 (en) | Denitration catalyst, process for preparing the same, and exhaust gas purification method | |
| KR20080059958A (en) | Simultaneous Desulfurization and Denitrification of Flue Gas by Ozone and Activated Coke | |
| US6001319A (en) | Method of removing nitrogen oxides using material for absorbing nitrogen oxides | |
| JPH0436729B2 (en) | ||
| KR100460665B1 (en) | A method for simultaneous removal of nitrogen oxides and dioxins from waste gases | |
| JPH08257363A (en) | Exhaust gas treatment method | |
| JPH02191524A (en) | Method for removing nitrogen oxide | |
| JPH0372914A (en) | Method for treatment of exhaust gas and preparation of silica gel utilizing the same | |
| JPH11165043A (en) | Exhaust gas treatment method for waste incinerator | |
| JP3290312B2 (en) | Flue gas desulfurization method | |
| JPH1057757A (en) | Treatment of dry waste gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |