Method and device for reduction of nitrogen protoxide

Abstract

The invention relates to a method and device for reducing nitrogen protoxide formed by catalytic combustion of ammonia and oxygen into nitrogen protoxide. The invention provides the use of a catalyst system comprising at least a first catalytic array and at least a second catalytic array for the catalytic combustion of ammonia and oxygen into nitrogen protoxides, first catalytic array being a platinum rhodium array and upstream second catalyst array being a platinum rhodium array with 2 to 4 weight % of rhodium.

Description

technical field [0001] The present invention relates to a method and a device for reducing nitrous oxide in nitrogen oxides formed during the catalytic combustion of ammonia and oxygen, wherein a catalyst device consisting of at least one first catalyst net and at least one second catalyst net is used Ammonia and oxygen are catalytically combusted into nitrogen oxides, and at least one of the first catalyst nets is a platinum-rhodium net. Background technique [0002] A well-known technical difficulty in the preparation of nitric acid by burning ammonia with oxygen to the corresponding nitrogen oxides is the simultaneous formation of nitrous oxide (laughing gas), a compound suspected of being involved in the destruction of the Earth's ozone layer when decomposed. Therefore, it is very important in the preparation of nitric acid that the subsequent effective destruction of the produced N 2 O, or to minimize the production of laughing gas. In this case, the yield of the desi...

AI Technical Summary

Problems solved by technology

[0010] method articulated above, or N 2 O The decomposition rate is insufficient, or the equipment expenditure is very high, which can be considered unsatisfactory in economic terms