PEG改性K_(2)CO_(3)/TiO_(2)催化剂及催化水解羰基硫性能研究  

Investigation of the PEG Modified K_(2)CO_(3)/TiO_(2)Catalyst and Its Properties for Catalytic Hydrolysis of Carbonyl Sulfide

作　　者：高为飞 徐勇峰 张小亮 胡天啸 李二欣 韦飞 姜东生 贾勇 GAO Weifei;XU Yongfeng;ZHANG Xiaoliang;HU Tianxiao;LI Erxin;WEI Fei;JIANG Dongsheng;JIA Yong(CHN Energy Fengcheng Power Generation Co.,Ltd.,Yichun 331100,China;State Power Environmental Protection Research Institute Co.,Ltd.,Nanjing 210031,China;School of Energy and Environment,Anhui University of Technology,Ma’anshan 243002,China)

机构地区：[1]国能丰城发电有限公司,江西宜春331100 [2]国电环境保护研究院有限公司,江苏南京210031 [3]安徽工业大学能源与环境学院,安徽马鞍山243002

出　　处：《环境科学与技术》2025年第3期229-236,共8页Environmental Science & Technology

基　　金：冶金减排与资源综合利用教育部重点实验室开放基金项目(JKF23-04)。

摘　　要：随高炉煤气排放的羰基硫(COS)是钢铁工业重要的有机硫污染物。该文以K_(2)CO_(3)为活性组分、大比表面积TiO_(2)为载体、聚乙二醇(PEG)为孔道结构改进剂,采用浸渍法制备催化剂PEG-K_(2)CO_(3)/TiO_(2),并对其催化水解COS的活性和微观结构特性进行了研究。结果表明,350℃温度下焙烧的2%PEG-4%K_(2)CO_(3)/TiO_(2)催化剂活性最高,当水蒸气含量2.93%、空速36000 h^(-1)、反应温度100~200℃时,COS催化水解转化率几乎100%。表征结果显示,PEG能够促进介孔的形成,增加比表面积和含氧碱性位点的曝露,进而促进COS在催化剂表面的吸附与活化。PEG通过优化孔道结构,促进水解产物分子的扩散,同时可降低催化剂K_(2)CO_(3)/TiO_(2)表面的化学吸附氧Oα的相对含量,提高催化剂的抗硫性能。Carbonyl sulfide(COS)discharged with blast furnace gas is an important organic sulfur pollutant in the iron and steel industry.In this paper,K_(2)CO_(3)was used as the active component,the large surface area was TiO_(2)as the carrier,polyethyl⁃ene glycol(PEG)as the pore structure improvement agent,the catalyst PEG-K_(2)CO_(3)/TiO_(2)was prepared by impregnation,and the activity and microstructural characteristics of the catalytic hydrolysis of COS were studied.The results indicated that the catalyst 2%PEG-4%K_(2)CO_(3)/TiO_(2)calcined at 350℃exhibits the best catalytic activity,the catalytic hydrolysis efficiency of COS is almost 100%at temperature range of 100 to 200℃as the water content is 2.93%and the space velocity is 36000 h^(-1).PEG can promote the formation of micropores and mesopore,which increase the specific surface area and promote the adsorp⁃tion and activation of COS on the surface of the catalyst.Moreover,PEG could promote the diffusion of hydrolysis products molecules,which improve the sulfur resistance of the catalyst.

关 键 词：羰基硫 K_(2)CO_(3) PEG 孔结构 抗硫 

分 类 号：X701[环境科学与工程—环境工程]