B_2O_3对CoO-MoO_3/CeO_2-Al_2O_3催化剂耐硫甲烷化性能的影响  

Effect of boron oxide addition on the activity of CoO-MoO_3/CeO_2-Al_2O_3 catalyst in sulfur-resistant methanation

作　　者：蔚文霞[1] 王保伟[1] 刘震[1] 孟大钧 李振花[1] 马新宾[1] Yu Wenxia Wang Baowei Liu Zhen Meng Dajun Li Zhenhua Ma Xinbin(Sehool of Chemical Engineering and Technology , TianjinUniversity, Key Laboratory for Green Chemical Technology ofMinistry of Education, Tianjin 300072, Chin)

机构地区：[1]天津大学化工学院绿色合成与转化教育部重点实验室,天津300072

出　　处：《石油化工》2017年第5期530-535,共6页Petrochemical Technology

基　　金：国家高技术研究发展计划项目(2015AA050504)

摘　　要：采用等体积浸渍法制备不同B_2O_3负载量的xB-CoMo/CeAl系列催化剂,研究不同B_2O_3负载量对催化剂耐硫甲烷化性能和催化剂结构的影响。采用N_2吸附-脱附、XRD、H_2-TPR、NH_3-TPD及Raman等方法对催化剂进行表征。实验结果表明,B_2O_3的加入一定程度上提高CH_4的选择性,降低C_2H_6的选择性,降低CO的转化率。表征结果显示,B_2O_3不利于催化剂活性组分的分散且生成低反应活性的CoMoS(Ⅱ)结构及没有甲烷化活性Co_9S_8物种,从而导致反应活性降低。xB-CoMo/CeA1 catalysts with different boron loading were prepared through impregnation with H3BO3 solution, and were characterized by means of BET, XRD, NH3-TPD, H2-TPR and Raman. The catalysts were used in sulfur-resistant methanation. The effects of boron content on the structure and performances of the catalysts were investigated. The results showed that the addition of B203 to CoO-MoO3/CeO2-Al2O3 could improve the selectivity to CH4, but reduce the selectivity to ethane and the conversion of CO. It was indicated that the addition of B2O3 was unfavorable to the dispersion of the active component molybdenum oxide and led to the formation of C09S8 and CoMoS（ Ⅱ ）, which could reduce the activity of the catalysts.

关 键 词：甲烷化 氧化硼 钴钼催化剂 复合载体 氧化铈一氧化铝 

分 类 号：TQ028.8[化学工程]