CeO_(2)基水煤气变换催化剂COS中毒热力学研究  

Thermodynamic study on COS poisoning in CeO_(2)-based water-gas shift catalysts

作　　者：奠波 姜琦 吴泳霖 蒋明[1] DIAN Bo;JIANG Qi;WU Yong-lin;JIANG Ming(College of Resources and Environment,Yunnan Agricultural University,Kunming 650201,China)

机构地区：[1]云南农业大学资源与环境学院,云南昆明650201

出　　处：《化学工程师》2023年第3期17-20,共4页Chemical Engineer

基　　金：国家自然科学基金项目(51768074)。

摘　　要：为探究COS对CeO_(2)基水煤气变换催化剂的中毒机制,用HSC Chemistry 6.0热力学数据库对CeO_(2)变换催化剂的COS中毒热力学进行了模拟计算,从热力学角度分析了在100~450℃水气变换温度下,COS分别与CO、H_(2)O和O2共存时,CeO_(2)催化剂可能发生的反应及产物。结果表明,温度分别高于150℃和300℃时,H_(2)O-COS-CeO_(2)和CO-COS-CeO_(2)体系中的CeO_(2)硫中毒可被明显抑制;O2对CeO_(2)硫中毒的影响最大,整个催化温度范围内,O2-COS-CeO_(2)体系中所有反应均可自发进行,含S固态产物为Ce2(SO4)3、Ce S2和S。In order to explore the poisoning mechanism of COS on CeO_(2)based water gas conversion catalyst,the thermodynamics of COS poisoning of CeO_(2)based water gas conversion catalyst was simulated and calculated using HSC Chemistry 6.0 thermodynamic database.From the perspective of thermodynamics,the temperature of100~450℃water gas conversion was analyzed.Possible reactions and products of CeO_(2)catalyst when COS coexists with CO,H_(2)O and O2,respectively.The results showed that when the temperature was higher than 150℃and250℃,respectively,CeO_(2)sulfur poisoning in H_(2)O-COS-CeO_(2)and CO-COS-CeO_(2)systems could be significantly inhibited.O2has the greatest effect on sulfur poisoning of CeO_(2).In the whole catalytic temperature range,all reactions in O2-COS-CeO_(2)system can be carried out spontaneously,and the solid products containing S are Ce2(SO4)3,CeS2and S.

关 键 词：变换催化剂 COS CeO_(2) 中毒 热力学 

分 类 号：X511[环境科学与工程—环境工程]