Reduction of NO Emission from the Cement Industry in South Korea: A Review
Atmosphere, ISSN: 2073-4433, Vol: 13, Issue: 1
2022
- 13Citations
- 35Captures
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Review Description
As climates change around the world, concern regarding environmental pollutants emitted into the atmosphere is increasing. The cement industry consistently produces more than 4000 million metric tons of cement per year. However, the problem of air pollutants being emitted from the calcination process is becoming more critical because their amount increases proportionally with cement production. Each country has established regulatory standards for pollutant emission. Accordingly, the cement industry is equipped with facilities to reduce air pollutants, one of which is the NO removal process. NO reduction processes under combustion conditions are modified to minimize NO generation, and the generated NO is removed through post-treatment. In terms of NO removal efficiency, the post-treatment process effectively changes the combustion conditions during calcination. Selective non-catalytic reduction (SNCR) and selective catalytic reduction (SCR) processes are post-treatment environmental facilities for NO reduction. Accordingly, considering the stringent NO emission standards in the cement industry, SNCR is essential, and SCR is selectively applied. Therefore, this paper introduces nitrogen oxide among air pollutants emitted from the South Korean cement industry and summarizes the technologies adapted to mitigate the emission of NO by cement companies in South Korea.
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