Catalytic structure for treating exhaust gases and a process for

Details Catalytic structure for treating exhaust gases and a process for Catalytic structure for treating exhaust gases and a process for

1980-06-17

1983-01-25

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252463, 252465, 252466J, 252477R, 4232132, 4232135, B01J 2104, B01J 2322, B01J 2328, B01J 2330

Patent

active

043702627

ABSTRACT:
A catalytic structure for treating exhaust gases is provided which is obtained by spraying molten aluminum onto the surface of a substrate such as wire netting, expanded metal, etc. in the presence of oxygen, to form on said surface of a substrate a roughened surface through deposit of fine aluminum particles thereon and also an aluminum oxide layer on said roughened surface, and adhering onto this layer a catalytic substance such as a catalyst for reducing nitrogen oxides.
The catalytic structure has a high catalyst-retainability to prevent the catalyst from readily peeling off from the surface even when a mechanical impact is applied thereto. Further it exhibits a superior corrosion resistance even in a corrosive environment containing sulfuric acid; hence it is suitably employed for the apparatuses for treating exhaust gases containing nitrogen oxides and sulfur oxides.

REFERENCES:
patent: 3560408 (1971-02-01), Kiehl et al.
patent: 4119701 (1978-10-01), Fedor et al.
patent: 4252690 (1981-02-01), Kamiya et al.
patent: 4257918 (1981-03-01), Ginger
patent: 4285838 (1981-08-01), Ishida et al.

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