Al_(2)O_(3)-Zn-K催化水解COS和CS_(2)的研究  

Study on Catalytic Hydrolysis of COS and CS_(2) by Al_(2)O_(3)-Zn-K

作　　者：贾银娟[1] 王灿[1] 吴双 高焕新[1] JIA Yin-juan;WANG Can;WU Shuang;GAO Huan-xin(Sinopec Shanghai Research Institute of Petrochemical Technology,Shanghai 201208,China)

机构地区：[1]中国石油化工股份有限公司上海石油化工研究院,上海201208

出　　处：《分子催化》2022年第2期171-179,共9页Journal of Molecular Catalysis(China)

摘　　要：以活性氧化铝为载体,浸渍负载Zn、K活性组分,制备优选Al_(2)O_(3)-Zn-K催化剂.考察了反应工艺条件对COS、CS_(2)脱除精度的影响,并对失活的催化剂进行表征,分析催化剂的失活原因.结果表明,负载Zn、K活性组分后,催化剂的弱碱性中心显著提高,负载量为4%时催化剂具有最优的水解活性.在180℃催化水解过程中,工艺条件对CS_(2)脱除精度的影响较COS更为明显.无氧条件下,反应过程中生成的硫酸盐和表面活性物质发生迁移导致催化剂碱性中心减少是催化剂失活的主要原因.Al_(2)O_(3)-Zn-K catalysts were prepared by impregnation of transition metal component Zn and alkali metal K on activated alumina.The effects of reaction conditions on the hydrolysis performance were investigated.In addition,both fresh and used hydrolyisis catalysts were characterized by several characterization techniques and the possible reasons for catalyst deactivation were analyzed.The results showed that the weak alkaline center of the catalyst significantly increased after loading active components Zn and K.When the loading amount was 4%,the catalyst showed the best hydrolysis activity.When the catalytic hydrolysis was carried out at 180℃,the influence of process conditions on the removal accuracy of CS_(2)was obvious than that of COS.The main reason for catalyst deactivation was the decrease of basic center,which was caused by the formation of sulfate and the migration of surface active centers under oxygen-free atmosphere.

关 键 词：羰基硫COS 二硫化碳CS_(2) 水解催化剂 失活 

分 类 号：TQ426[化学工程]