Zeolites as specific adsorbents for NO.sub.X and CO

Details Zeolites as specific adsorbents for NO.sub.X and CO Zeolites as specific adsorbents for NO.sub.X and CO

1989-02-21

1990-07-31

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

73 3106, 204424, 123489, F02D 4114, G01N 27417

Patent

active

049442732

ABSTRACT:
The use of zeolites rich in silicic acids having an Si:Al ratio of 1:1 to 100:1 as specific adsorbents for NO.sub.X or CO is proposed. Because of their property of specifically adsorbing NO.sub.X or CO, these zeolites, in particular those zeolites doped with such metals as Ca, Co, Ni, Fe, Cu, Ag, Pt or Ru, and having the above mentioned ratio of Si to Al, are especially suitable for the production of specific NO.sub.X or CO sensors based on semiconductors. Such sensors can be used as sensors for exhaust gases of automotive vehicles, for example.

REFERENCES:
patent: 3702886 (1972-11-01), Argauer et al.
patent: 3999122 (1976-12-01), Winstel et al.
patent: 4250345 (1981-02-01), Chu
patent: 4347732 (1982-09-01), Leary
patent: 4453151 (1984-06-01), Leary et al.
patent: 4703646 (1987-11-01), Muller et al.
patent: 4759210 (1988-07-01), Wohltjen

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