Pd/γ-Al2O3催化对烟气中多环芳烃的氧化性能研究

Abstract

实验采用等体积浸渍法制备了系列Pd/γ-Al2O3催化剂。采用模拟实验装置并结合XRD、N2吸/脱附、TEM、H2-TPR和SEM-MAPS等手段对催化剂的组成及结构进行了表征,系统地考察了各催化剂对燃煤烟气中PAHs的催化氧化性能。结果表明,催化剂对烟气中PAHs排放总量的氧化效率为67.3%~93.5%,且烟气中PAHs的转化率随着Pd负载量的增加而提高;而催化剂的氧化性能随着PAHs环数(3~6)的增加而提高,对烟气中各PAHs排放毒性当量去除率超过90%。其中,Pd负载量为0.2%、催化剂焙烧温度为600℃条件下制备的催化剂具有最佳的PAHs消除性能,PAHs的氧化效率可达93.5%

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Institute of Urban Environment,Chinese Academy of Sciences

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Last time updated on 08/04/2018

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