Method of treating exhaust gas discharged from nitric acid plant

Details Method of treating exhaust gas discharged from nitric acid plant Method of treating exhaust gas discharged from nitric acid plant

1977-06-10

1978-09-19

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

B01D 5300

Patent

active

041155165

ABSTRACT:
A compressed exhaust gas containing nitrogen oxides discharged from a compressed absorption type nitric acid plant is treated by adding ammonia or an ammonia precursor to the gas and passing the gas through a NO.sub.x removing catalytic layer to an exhaust gas turbine wherein the temperature of the main flow of the exhaust gas in the zone from the point of which ammonia or an ammonia precursor is added to the outlet of the exhaust gas turbine is maintained at a temperature higher than T.degree. K = 10.sup.3 / (1.91 - 0.228 log P) [P : a sum of partial pressures of ammonia and nitrogen oxides (atm.)] and feeding an inert gas into the place of the zone in which the exhaust gas stagnates.

REFERENCES:
patent: 3279884 (1966-10-01), Nonnenmacher et al.
patent: 3885019 (1975-05-01), Matsushita et al.
patent: 3895094 (1975-07-01), Carter et al.

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