In recent years, people have paid more and more attention to environmental protection, and environmental protection standards have become increasingly stringent. The application of denitrification technology in coal-fired boilers is an effective way to reduce nitrogen oxides, and it has also received great attention. There are two main types of denitrification technology: SNCR (selective non-catalytic reduction technology) and SCR (selective catalytic reduction technology). This article focuses on the comparison and current status analysis of the denitrification principles, reductants, and catalysts of SNCR and SCR, and points out the current problems, in order to provide a reference for the future development of SNCR and SCR denitrification technology.
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