Process of removing SO.sub.x and NO.sub.x from waste gases

Details Process of removing SO.sub.x and NO.sub.x from waste gases Process of removing SO.sub.x and NO.sub.x from waste gases

1986-09-22

1987-12-01

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423244, B01J 800, C01B 1700, C01B 2100

Patent

active

047103639

ABSTRACT:
In a process for removing SO.sub.x and NO.sub.x from waste gases, SO.sub.x will quasi-completely be removed from the waste gases either in a first single step or in several steps, and this preferably by means of adsorption cokes (activated carbon) of an adsorptive capacity for SO.sub.2 of above 40 g SO.sub.2 per KG of coke, whereupon the thus pre-cleaned gas will be subjected to a secondary treatment after admixture of NH.sub.3 using catalysts of an absorptive capacity for SO.sub.2 of below 10 g SO.sub.2 per KG of catalyst, preferably below 5 g of catalyst, by reduction of NO.sub.x to N.sub.2.

REFERENCES:
patent: Re29771 (1978-09-01), Cull et al.
patent: 3887683 (1975-06-01), Abe et al.
patent: 4272497 (1981-06-01), Takahashi et al.
patent: 4400363 (1983-08-01), Grochowski et al.
patent: 4469662 (1984-09-01), Hamada et al.
patent: 4500501 (1985-02-01), Hamada et al.
patent: 4629609 (1986-12-01), Fruhbuss

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