Selective adsorption of nox from gas streams

Details Selective adsorption of nox from gas streams Selective adsorption of nox from gas streams

B - Operations, Transporting

01

D

183/35

B01D 53/02 (2006.01) B01J 20/18 (2006.01)

Patent

CA 1071545

D-9942 SELECTIVE ADSORPTION OF NOx FROM GAS STREAMS ABSTRACT OF DISCLOSURE In the process for selectively adsorbing NOx from nitric acid plant acid absorber tower tail gas streams wherein the tailgas stream, comprising water vapor, oxygen, nitrogen and unreacted NOx is first dried by passage through a silica adsorbent mass and thereafter the NOx is selectively adsorbed in a zeolitic molecular sieve bed, the improvement which comprises utilizing as the molecular sieve adsorbent a zeolite Y composition having a high degree of ionic character coupled with a high degree of acid stability. S P E C I F I C A T I O N - 1 -

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