JPS5443868A - Removing method for nox in exhaust gas - Google Patents
Removing method for nox in exhaust gasInfo
- Publication number
- JPS5443868A JPS5443868A JP11000577A JP11000577A JPS5443868A JP S5443868 A JPS5443868 A JP S5443868A JP 11000577 A JP11000577 A JP 11000577A JP 11000577 A JP11000577 A JP 11000577A JP S5443868 A JPS5443868 A JP S5443868A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- iron
- iron substrate
- feo2h
- desiccation
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 14
- 239000003054 catalyst Substances 0.000 abstract 7
- 229910052742 iron Inorganic materials 0.000 abstract 7
- 239000000758 substrate Substances 0.000 abstract 5
- 238000010438 heat treatment Methods 0.000 abstract 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- -1 gamma-FeO2H Chemical class 0.000 abstract 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 1
- 235000013980 iron oxide Nutrition 0.000 abstract 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Abstract
PURPOSE:To activate the catalyst with a simple treatment, to use it for a long period of time and to reduce and remove cheaply the abovementioned NOX, by using the material obtained by generating a specified amount of the iron rust of a specified heating loss, consisting of gamma-FeO2H, alpha-FeO2H, etc. as the main components, by repeating the desiccation and humidification without heating on the surface of iron substrate, as the catalyst. CONSTITUTION:By exposing the iron substrate outdoors and repeating the desiccation and humidification at the normal temperature, the iron rust consisting of hydrated iron oxides such as gamma-FeO2H, alpha-FeO2, etc. as the main components and showing the heating loss to 150-300 deg.C more than 7%, is generated in an amount more than 10mg/cm<2> for the surface area of the iron substrate and is used as the catalyst. By contacting the exhaust gas to the catalyst after NH3 has been added to the above gas, NOX in the exhaust gas is reduced to N2 and is removed. The above catalyst can be prepared easily and cheaply by exposing the iron substrate outdoors or by passing air through the inside of the reactor made of steel and spraying water or a dilute aqueous solution of sulfuric acid intermittently. Besides, when the activity has lowered, after a part or the whole of rust has been removed, the catalyst is regenerated by repeating the desiccation and hymidification and is used several times as the catalyst until the iron substrate collapses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11000577A JPS5443868A (en) | 1977-09-14 | 1977-09-14 | Removing method for nox in exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11000577A JPS5443868A (en) | 1977-09-14 | 1977-09-14 | Removing method for nox in exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5443868A true JPS5443868A (en) | 1979-04-06 |
Family
ID=14524678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11000577A Pending JPS5443868A (en) | 1977-09-14 | 1977-09-14 | Removing method for nox in exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5443868A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0645783B2 (en) * | 1985-04-04 | 1994-06-15 | ロクタイト．コ−ポレ−シヨン | Self-adhesive one-component naturally vulcanized silicone sealant composition using glycidoxyalkyl-substituted alkoxyoxime silane as a fixing agent |
-
1977
- 1977-09-14 JP JP11000577A patent/JPS5443868A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0645783B2 (en) * | 1985-04-04 | 1994-06-15 | ロクタイト．コ−ポレ−シヨン | Self-adhesive one-component naturally vulcanized silicone sealant composition using glycidoxyalkyl-substituted alkoxyoxime silane as a fixing agent |
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