JPS57140628A - Catalytic reductive decomposition of nitrogen oxides - Google Patents
Catalytic reductive decomposition of nitrogen oxidesInfo
- Publication number
- JPS57140628A JPS57140628A JP56025304A JP2530481A JPS57140628A JP S57140628 A JPS57140628 A JP S57140628A JP 56025304 A JP56025304 A JP 56025304A JP 2530481 A JP2530481 A JP 2530481A JP S57140628 A JPS57140628 A JP S57140628A
- Authority
- JP
- Japan
- Prior art keywords
- nox
- carried out
- synthetic zeolite
- type synthetic
- hydrogen type
- 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.)
- Pending
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title abstract 6
- 238000000354 decomposition reaction Methods 0.000 title abstract 2
- 230000002829 reductive effect Effects 0.000 title abstract 2
- 230000003197 catalytic effect Effects 0.000 title 1
- 239000007789 gas Substances 0.000 abstract 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 3
- 229910021536 Zeolite Inorganic materials 0.000 abstract 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 abstract 3
- 239000001257 hydrogen Substances 0.000 abstract 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract 3
- 239000010457 zeolite Substances 0.000 abstract 3
- 239000003054 catalyst Substances 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
PURPOSE: To remove nitrogen oxides from an exhaust gas, especially, a high temp. exhaust gas in good efficiency by utilizing such a phenomenon that, if hydrogen type synthetic zeolite is used as a catalyst, an extremely high denitrating ratio is obtained in a high temp. range of 500W700°C.
CONSTITUTION: By using a hydrogen type synthetic zeolite as a catalyst, the reductive decomposition reaction of NOx is carried out under a reaction temp. condition of 500W700°C, pref., 500W650°C while GHSV of NOx containing gas is adjusted to about 100W150,000hr-1, pref., about 10,000W100,000hr-1. In this case, an addition amount of ammonia basing on NOx contained in said gas may be a stoichiometric amount or more but, when denitration is carried out at a high temp. exceeding 600°C, use of an excessive amt. is preferred. Generally, the reaction is carried out so as to adjust a molar ratio of NH3/NOx to about 1.0W1.5 and, as the hydrogen type synthetic zeolite, one having an avaliable fine pore size of 8W12Å is used.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56025304A JPS57140628A (en) | 1981-02-23 | 1981-02-23 | Catalytic reductive decomposition of nitrogen oxides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56025304A JPS57140628A (en) | 1981-02-23 | 1981-02-23 | Catalytic reductive decomposition of nitrogen oxides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57140628A true JPS57140628A (en) | 1982-08-31 |
Family
ID=12162268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56025304A Pending JPS57140628A (en) | 1981-02-23 | 1981-02-23 | Catalytic reductive decomposition of nitrogen oxides |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57140628A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59230642A (en) * | 1983-06-15 | 1984-12-25 | Toyo Soda Mfg Co Ltd | Selective reducing and denitrating catalyst and denitration method of gas using the same |
| JPS6022922A (en) * | 1983-07-20 | 1985-02-05 | Babcock Hitachi Kk | Denitration method by reduction with ammonia and its apparatus |
| US5271913A (en) * | 1989-12-28 | 1993-12-21 | Mitsubishi Jukogyo Kabushiki Kaisha | Denitration catalyst for high-temperature exhaust gas |
-
1981
- 1981-02-23 JP JP56025304A patent/JPS57140628A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59230642A (en) * | 1983-06-15 | 1984-12-25 | Toyo Soda Mfg Co Ltd | Selective reducing and denitrating catalyst and denitration method of gas using the same |
| JPH0417096B2 (en) * | 1983-06-15 | 1992-03-25 | Tosoh Corp | |
| JPS6022922A (en) * | 1983-07-20 | 1985-02-05 | Babcock Hitachi Kk | Denitration method by reduction with ammonia and its apparatus |
| JPH0417083B2 (en) * | 1983-07-20 | 1992-03-25 | Babcock Hitachi Kk | |
| US5271913A (en) * | 1989-12-28 | 1993-12-21 | Mitsubishi Jukogyo Kabushiki Kaisha | Denitration catalyst for high-temperature exhaust gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5314662A (en) | Method for decreasing nitrogen oxides concentration of combustion exhaust gas | |
| ES2054597T1 (en) | PROCEDURE FOR THE DENITRIFICATION OF EXHAUST GASES TO OBTAIN HNO3. | |
| GB1495807A (en) | Selective catalytic removal of nitrogen oxides from waste gas | |
| KR970058770A (en) | Removal method of nitrogen oxide using manganese ore | |
| JPS57140628A (en) | Catalytic reductive decomposition of nitrogen oxides | |
| JPS5285056A (en) | Removal of nitrogen oxides | |
| CA1064225A (en) | Process for removing nox from a flue gas by selective reduction with nh3 | |
| ATE146694T1 (en) | CATALYST FOR REDUCING NITROGEN OXIDES IN FLUE GAS AND METHOD FOR PRODUCING IT | |
| JPS52106362A (en) | Decomposition of nitrogen oxides by catalytic reduction | |
| JPS5471768A (en) | Nitrogen oxides decomposing method | |
| JPS5315259A (en) | Denitrating method for exhaust gas from sintering equipment | |
| JPS54110971A (en) | Removal of nitrogen oxide contained in coke furnace exhaust gas | |
| JPS5285059A (en) | Removal of nitrogen oxides from combustion waste gas | |
| JPS5290461A (en) | Removal of nitrogen oxides | |
| JPS52129677A (en) | Treatment of gas containing nitrogen oxides | |
| JPS52106389A (en) | Catalyst for purification of nitrogen oxides | |
| JPS52111463A (en) | Denitration of exhaust gas | |
| JPS52123371A (en) | Decomposition of nitrogen oxides by catalytic reduction | |
| JPS5353572A (en) | Treating metod for gas cntaining ammonia | |
| JPS5289560A (en) | Removal of nitrogen oxides | |
| JPS52145370A (en) | Catalytic reduction of nitrogen oxides | |
| JPS5376970A (en) | Removing mehod for mitrogen oxides and sulfur oxides contained in exhaust gas | |
| JPS52129667A (en) | Lowering concentration of nitrogen oxides contained in combustion exhaust gas | |
| JPS535094A (en) | Regeneration method of denitration catalyst | |
| JPS5288259A (en) | Removal of nitrogen oxides |