JPS5466377A - Removing method for nitrogen oxides in exhaust gas from combustion - Google Patents
Removing method for nitrogen oxides in exhaust gas from combustionInfo
- Publication number
- JPS5466377A JPS5466377A JP13399077A JP13399077A JPS5466377A JP S5466377 A JPS5466377 A JP S5466377A JP 13399077 A JP13399077 A JP 13399077A JP 13399077 A JP13399077 A JP 13399077A JP S5466377 A JPS5466377 A JP S5466377A
- Authority
- JP
- Japan
- Prior art keywords
- iron ores
- ratio
- catalyst
- content
- fe2o3
- 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 3
- 238000002485 combustion reaction Methods 0.000 title 1
- 239000007789 gas Substances 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 14
- 229910052742 iron Inorganic materials 0.000 abstract 7
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 5
- 239000003054 catalyst Substances 0.000 abstract 4
- 229910006297 γ-Fe2O3 Inorganic materials 0.000 abstract 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
Classifications
-
- 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
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
PURPOSE:To reduce and remove NOx with an excellent continuous removing efficiency and using a cheap catalyst, by reducing catalytically NOx in the exhaust gas with NH3 using natural iron ores containing gamma-Fe2O3 in a specified ratio as the catalyst. CONSTITUTION:As the above catalyst, the iron ores of which the converted value to magnetite [(the ratio of Fe3O4 content from the magnetic measurement)-(the ratio of Fe3O4 content from the chemical analysis value)] is 1.6 wt.% in the content ratio of gamma-Fe2O3, are used. As these iron ores, a sinle brand or a mixture of more than two kinds of brands, is used and, for example, natural iron ores from Loberiver, Swaziland, Riodese, etc. are used. Beside, it is preferable to use these iron ores having a grain size of 3-6mm in diameter. Further, because the catalyst of these iron ores can be charged into the blast furnace after the use, it is beneficial also for the prevenion of environmental pollution. Besides, the relation between the ratio of gamma-Fe2O3 content in the iron ores and the efficiency of denitration is showed in the figure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13399077A JPS5466377A (en) | 1977-11-08 | 1977-11-08 | Removing method for nitrogen oxides in exhaust gas from combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13399077A JPS5466377A (en) | 1977-11-08 | 1977-11-08 | Removing method for nitrogen oxides in exhaust gas from combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5466377A true JPS5466377A (en) | 1979-05-28 |
Family
ID=15117798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13399077A Pending JPS5466377A (en) | 1977-11-08 | 1977-11-08 | Removing method for nitrogen oxides in exhaust gas from combustion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5466377A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4774213A (en) * | 1985-12-16 | 1988-09-27 | Sud-Chemie Aktiengesellschaft | Ferruginous catalyst for decreasing the content of nitrogen oxides in flue gases |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5230768A (en) * | 1975-09-05 | 1977-03-08 | Nippon Kokan Kk <Nkk> | Process for the denitrification of exhaust gas with iron oxide as cata lyst |
| JPS52106363A (en) * | 1976-03-04 | 1977-09-06 | Toyo Kogyo Co | Method of preventing deterioration of catalyst for engine exhaust gases |
| JPS52117888A (en) * | 1976-03-31 | 1977-10-03 | Kyushu Refractories | Manufacture of iron oxide catalysts for oxidation and reduction |
-
1977
- 1977-11-08 JP JP13399077A patent/JPS5466377A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5230768A (en) * | 1975-09-05 | 1977-03-08 | Nippon Kokan Kk <Nkk> | Process for the denitrification of exhaust gas with iron oxide as cata lyst |
| JPS52106363A (en) * | 1976-03-04 | 1977-09-06 | Toyo Kogyo Co | Method of preventing deterioration of catalyst for engine exhaust gases |
| JPS52117888A (en) * | 1976-03-31 | 1977-10-03 | Kyushu Refractories | Manufacture of iron oxide catalysts for oxidation and reduction |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4774213A (en) * | 1985-12-16 | 1988-09-27 | Sud-Chemie Aktiengesellschaft | Ferruginous catalyst for decreasing the content of nitrogen oxides in flue gases |
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