自由基对LaCoO_3催化剂还原脱硫性能的影响  

Influence of Free Radicals on Catalytic Reduction of Sulfur Dioxide in the Presence of Oxygen over Sulfurized LaCoO_3

作　　者：赵龙[1] 马智[1] 秦永宁[1] 齐晓周[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《化学工业与工程》2007年第1期8-10,43,共4页Chemical Industry and Engineering

基　　金：国家自然科学基金资助项目(90210025)

摘　　要：进行了自由基对钙钛矿型LaCoO3催化剂在含氧气氛下还原脱硫性能影响的研究。考察的自由基为热裂解丙酮产生,发现自由基可以有效地抑制混和气中的氧气对LaCoO3催化剂的毒化作用,保护了其在含氧气氛下催化还原脱硫的活性。对催化剂进行XRD及XPS分析,考察了自由基对催化剂物相结构和表面状态的影响。The influence presence of oxygen over of free radicals on catalytic reduction of sulfur dioxide by carbon monoxide in the sulfurized LaCoO3 was discussed. It is found that oxygen poisoning can be eliminated through the reaction with free radicals produced by pyrolysis of acetone, thus the activity of the catalyst can be well maintained. XRD and XPS were used to investigate the influence of free radicals on the catalyst＇ s bulk phase and surface state.

关 键 词：自由基 烟气脱硫 钙钛矿 

分 类 号：X511[环境科学与工程—环境工程]