Progresses in the NOX Elimination Using Zeolite Under Low-Temperature Ammonia-Based Selective Catalytic Reduction—A Review

Abstract

The chemical absorption biological reduction process gained profound attention in NOx removal. Treatments for NOx are done popularly using NH3 in selective catalytic reduction (SCR), and deNOx is greatly influenced by catalyst. In recent years, zeolites have been widely explored in ammonia-selective catalytic reduction (NH3-SCR) under low-temperature windows. Different methods were employed to juxtapose the performances of zeolite catalysts with denitrification and NH3-SCR. In this NH3-SCR reaction, the zeolite catalyst’s sulfur and water poisoning effects were also investigated. The negatives of the low-temperature NH3-SCR reactions were demonstrated by using different methods. Ideally, this audit will set upon essential comprehension of the SCR response on zeolite catalysts and clear the way for future exploration to accomplish reasonable applications. The current review provides a new strategy to enhance the removal of NOx and reveals the fundamental effects of different types of sustainable catalysts for the environment. Further, the perspective of the economic aspects of each catalyst is also examined.