应用催化氧化催化剂脱除烟气中NO的研究进展

摘要

Recently how to control and reduce NOx emission became an important content of China’s air pollution treatment. This paper briefly analyzes the NOx control methods in coal combustion,and compares the advantages and disadvantages of NOx reduction technologies,which have been interesting by researchers now. The research progress of these NO catalytic oxidations catalysts are summarized in this paper. There is less research on molecular sieves and their supported catalysts because of their low activity at low temperature. Studies on activated carbons mainly focus on their modification and the preparation of new carbon materials. Noble metals have good catalytic activity,but their high costs have restricted their industrial application. Metal oxides have been widely studied due to their high catalytic activity and distinct advantage of price. In recent years more and more researchers apply new materials and wastes to NO oxidation.%如何控制减少氮氧化物的产生排放已成为当今中国空气污染治理的主要内容。本文简要分析了燃烧过程控制技术，针对目前国内外较为关注的烟气NOx脱除工艺进行了优缺点两方面的分析比较。综述了催化氧化NO催化剂的研究进展：分子筛及其负载型催化剂由于其低温活性较低，目前研究较少；活性炭类的研究主要集中在改性以及新型炭材料的制备；贵金属类催化活性较好，但是成本过高限制了其工业化；金属氧化物类由于具有较高的催化活性，明显的价格优势，已经成为目前国内外催化剂研究的重点；将新材料以及废物应用于NO的氧化近几年吸引了越来越多的目光。