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.
作者
奠波
姜琦
吴泳霖
蒋明
DIAN Bo;JIANG Qi;WU Yong-lin;JIANG Ming(College of Resources and Environment,Yunnan Agricultural University,Kunming 650201,China)
出处
《化学工程师》
CAS
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)。
