负载型Mn基低温NH3-SCR脱硝催化剂研究综述

摘要

MnOx has become a catalyst research hot spot low-temperature selective catalytic reduction of NOx with NH3,because of its good catalytic activity. Supported Mn-based catalysts could greatly overcome the problems such as poor N2selectivity at low temperature and easily being poisoned,et al, and therefore have good prospects for industrial applications. This paper presents the research progress of Mn-based low-temperature De-NOx catalysts,from their active ingredients,carriers,mechanism, kinetics,and abilities of anti- H2O and SO2. The latest achievements on the preparation method and denitrification activity of artificial and natural carrier based such as the metal oxide,molecular sieve, and carbon based supported MnOx were explained in detail. It also summarizes the progress of the catalytic mechanism and kinetics of Mn-based low-temperature denitration catalysts,and analyzes the poisoning mechanism of H2O and SO2. It is pointed out that improving the anti-poisoning performance and regeneration are the focus of future research.%MnOx以其良好的低温催化活性成为当前低温NH3-SCR脱硝催化剂研究的热点，负载型Mn基低温脱硝催化剂较好地解决了非负载型低温 N2选择性差、易中毒等难题，具有良好的工业应用前景。本文综述了负载型Mn基低温脱硝催化剂的研究现状，从活性组分、载体、制备方法、机理和动力学以及抗H2O、SO2性能5个方面介绍了负载型Mn基低温脱硝催化剂的研究现状，着重阐述了金属氧化物、分子筛、炭基等人工和天然载体负载MnOx在制备方法和脱硝活性方面的最新研究成果，简述了Mn基低温脱硝催化剂的催化机理以及动力学研究进展，分析了Mn基低温脱硝催化剂的H2O和SO2中毒机理。指出提高负载型Mn基低温脱硝催化剂的抗中毒性能和再生是今后研究的重点。