JPS55149648A - Catalyst for cleaning automobile exhaust gas - Google Patents
Catalyst for cleaning automobile exhaust gasInfo
- Publication number
- JPS55149648A JPS55149648A JP5828879A JP5828879A JPS55149648A JP S55149648 A JPS55149648 A JP S55149648A JP 5828879 A JP5828879 A JP 5828879A JP 5828879 A JP5828879 A JP 5828879A JP S55149648 A JPS55149648 A JP S55149648A
- Authority
- JP
- Japan
- Prior art keywords
- support
- zno
- catalyst
- impregnated
- exhaust gas
- 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.)
- Granted
Links
- 239000003054 catalyst Substances 0.000 title abstract 8
- 238000004140 cleaning Methods 0.000 title abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 2
- 229910052593 corundum Inorganic materials 0.000 abstract 2
- 229910000510 noble metal Inorganic materials 0.000 abstract 2
- 229910052698 phosphorus Inorganic materials 0.000 abstract 2
- 239000011574 phosphorus Substances 0.000 abstract 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 2
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- 230000005714 functional activity Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000010705 motor oil Substances 0.000 abstract 1
- 231100000572 poisoning Toxicity 0.000 abstract 1
- 230000000607 poisoning effect Effects 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 229910052594 sapphire Inorganic materials 0.000 abstract 1
- 229910052596 spinel Inorganic materials 0.000 abstract 1
- 239000011029 spinel Substances 0.000 abstract 1
- 230000007704 transition Effects 0.000 abstract 1
- 238000004017 vitrification Methods 0.000 abstract 1
Abstract
PURPOSE: To prevent the phosphorus poisoning of a catalyst for cleaning the exhaust gas of automobile and also the lowering of the function of the catalyst support, by a method in which more than a specific amount of ZnO is impregnated into a support whose surface is composed of activated alumina and then a noble metal catalyst component is coated on the surface of the support.
CONSTITUTION: More than 0.05g/1g of support of ZnO is impregnated into a support of which at least the surface is composed of activated alumina and then the surface is covered with a noble metal catalyst component. Thus, when oxides, e.g., ZnO, P2O5, etc., formed in the combustion of engine oil are adhered to the surfaces of said catalyst, the diffusion of ZnO adhered to the surfaces into the support can be greatly prevented by means of ZnO impregnated in advance into the support, resulting in the enhancement of the ratio of ZnO to P2O5 on the surfaces of the catalyst as well as the prevention of the vitrification of P2O5, or the posioning by phosphorus of the catalyst. At the same time, the impregnated ZnO combines with Al2O3 present in the support to form a spinel structure and thereby the transition of Al2O3 into alpha-Al2O3 which is not good in functional activity of support can be prevented.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5828879A JPS55149648A (en) | 1979-05-12 | 1979-05-12 | Catalyst for cleaning automobile exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5828879A JPS55149648A (en) | 1979-05-12 | 1979-05-12 | Catalyst for cleaning automobile exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55149648A true JPS55149648A (en) | 1980-11-21 |
| JPS6322854B2 JPS6322854B2 (en) | 1988-05-13 |
Family
ID=13080006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5828879A Granted JPS55149648A (en) | 1979-05-12 | 1979-05-12 | Catalyst for cleaning automobile exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55149648A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4945889A (en) * | 1972-09-07 | 1974-05-01 | ||
| JPS50104194A (en) * | 1974-01-19 | 1975-08-16 |
-
1979
- 1979-05-12 JP JP5828879A patent/JPS55149648A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4945889A (en) * | 1972-09-07 | 1974-05-01 | ||
| JPS50104194A (en) * | 1974-01-19 | 1975-08-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6322854B2 (en) | 1988-05-13 |
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