Pd-Ag/α-Al2O3催化剂在乙烷裂解配套制乙烯工艺中的选择加氢性能研究  

Selective hydrogenation performance of Pd-Ag/α-Al2O3 catalyst in the process of ethane cracking to produce ethylene

作　　者：苟尕莲 梁玉龙 韩伟 车春霞 温翯 张峰 边虎 Gou Galian;Liang Yulong;Han Wei;Che Chunxia;Wen He;Zhang Feng;Bian Hu(Lanzhou Petrochemical Research Center,Petrochemical Research Institute,Petrochina,Lanzhou 730060,Gansu,China)

机构地区：[1]中国石油石油化工研究院兰州中心,甘肃兰州730060

出　　处：《工业催化》2020年第10期71-74,共4页Industrial Catalysis

摘　　要：在乙烷裂解配套制乙烯选择加氢的工艺条件下,考察载体焙烧温度、助剂Ag含量、溶液pH值、CO含量及空速对等体积浸渍法制备的Pd-Ag/α-Al2O3催化剂性能的影响。结果表明,载体焙烧温度的增加,有助于提高催化剂活性;催化剂Ag含量增加,反应温度变化不大,选择性及抗结焦性能增加;不同溶液pH制备催化剂,选择加氢性能差异不大,但溶液的酸性过高会降低催化剂的抗结焦性能;随着CO的升高,乙炔转化率降低,乙烯选择性先增高后降低,为保证催化剂选择性,原料中的CO最好保持在(700~1600)μL·L^-1;随着空速的升高,乙炔转化率降低,乙烯选择性增加。Under the process conditions for selective hydrogenation of ethylene produced by ethane crac-king,the effects of carrier calcination temperature,Ag content of additives,pH value,CO content and space velocity on the performance of Pd-Ag/α-Al2O3 catalyst prepared by equal volume impregnation were investigated.The results show that the increase in the calcination temperature of the carrier helps to improve the activity of the catalyst.The Ag content of the catalyst increases,the reaction temperature does not change much,and the selectivity and anti-coking performance increase.The preparation of catalysts with different solution pH has little difference in hydrogenation performance,but if the acidity of the solution is too high,it will reduce the anti-coking performance of the catalyst.With the increase of CO,the conversion of acetylene decreases,and the ethylene selectivity first increases and then decreases.In order to ensure the catalyst selectivity,the CO in the raw material is best maintained at(700-1600)μL·L^-1.As the space velocity increases,the conversion of acetylene decreases and the selectivity of ethylene increases.

关 键 词：有机化学工程 乙炔 乙烷裂解 Pd催化剂 选择加氢 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]