Research Progress on Catalytic Reduction of NOx in Chemical Engineering

Abstract

Abstract. With the increasingly serious environmental problems, catalytic denitrification technology of coal-fired flue gas has been developed rapidly. Aiming at the widely used selective catalytic reduction and denitrification technology, this paper summarizes the ammonia selective catalytic denitrification technology and non-ammonia catalytic denitrification technology at the low temperature from the mechanism of catalytic denitrification technology. The reaction mechanism and reaction process of metal oxide catalysts, molecular sieve catalysts and carbon-based catalysts were summarized among ammonia selective catalytic denitrification technology in the low-temperature. For the non-ammonia catalytic denitrification technology at low temperature, the catalytic cracking technology, HC-SCR technology, NO x adsorption-reduction technology and CO catalytic denitrification technology were summarized as well. On the basis of this, this paper figures out the future research direction of low temperature catalytic denitrification, which is to improve the denitrification process to improve the catalytic denitrification process, vigorously develop nitrogen oxide adsorption reduction technology.