中低温条件下选择性催化NO_x还原的研究进展

Research progress of selective catalytic reduction of NO_x at medium-low temperature

概述了国内外在中低温条件下开展的贵金属、分子筛、炭基及金属氧化物四大类选择性催化还原(SCR)催化剂的最新研究进展,为工业窑炉烟气催化脱硝提供催化剂研究前沿信息。分析了各类SCR催化剂的特点,特别是在改性、耐硫抗水及机理研究方面的工作。为了实现SCR技术在工业窑炉烟气中的应用,需充分利用各活性组分在中低温、耐硫、耐水等方面的突出性能,结合过渡金属氧化物对现有成熟SCR催化剂进行改性,提升中低温催化NOx性能和抗中毒能力,将具有较好的研究和应用前景。

Research progress of selective catalytic reduction（SCR）of NOx with noble metals,molecular sieves,carbon-based and metal oxides catalysts at a medium-low temperature is summarized,providing up-to-date information of catalysts for the catalytic denitrification of industrial kiln flue gas.This paper analyzes the characteristics of various catalysts,especially modification of catalyst,sulfur-tolerant,water-resistant catalysts and reaction mechanism.In order to apply SCR technology to industrial kiln flue gas denitrification,the outstanding performance of active components in catalystic activity at a medium-low temperature,sulfur-tolerance,water-resistance and so on should be made full use of.Modification of mature SCR catalyst with transition metal oxides to improve activity and anti-poisoning ability would have better research and development prospect.