新型C_2馏分加氢除炔催化剂的制备和应用  

Preparation and Application of Novel C_2 Fraction Selective Hydrogenation Catalyst

作　　者：董文寰 李斯琴 

机构地区：[1]兰州石化公司石油化工研究院,甘肃兰州730060

出　　处：《石油化工》2005年第12期1186-1189,共4页Petrochemical Technology

摘　　要：针对C2馏分加氢除炔Pd催化剂在工业应用中存在的缺陷,考察了添加Ag助剂和碱金属化合物对催化剂的活性、选择性和稳定性的影响。试验结果表明,加入Ag对提高催化剂的选择性和稳定性有很大的作用,当Pd盐浸渍液的pH为1.8、Ag盐浸渍液的pH为2.3、n(Ag)∶n(Pd)=9时,制备的催化剂的活性和选择性较高,稳定性较好;加入碱金属化合物可以有效地控制催化剂中Pd和Ag活性组分的流失。在此基础上,开发出新型C2馏分加氢除炔ZB1#J催化剂,并对ZB1#J催化剂进行了1 000 h的稳定性试验及工艺性能的考察,试验结果表明,ZB1#J催化剂在稳定性试验中,平均转化率为53.02%,乙烯增量(体积分数)在0.33%以上,且可在较宽的工艺条件范围内使用,尤其能适应高空速、高炔烃含量的各种工况条件,适于工业化应用。Considering defects of Pd catalyst for C2 alkyne hydrogenation in industrial steam cracking ethylene installation, effects of adding Ag and alkaline metal compounds on catalyst activity, selectivity and stability were investigated. The addition of Ag played a very important role in improving catalyst selectivity and stability. When pH of Pd salt solution was 1.8 ,pH of Ag salt solution was 2.3 and n（Ag） ： n（Pd） =9 ,activity,selectivity and stability of the prepared catalyst were high. Addition of alkaline metal compounds could effectively control the loss of Pd and Ag of the catalyst. Based on above facts, a new C2 alkyne hydrogenation catalyst ZB1 #J was developed and a 1 000 h stability experiment of catalyst was carded out. The average conversion of acetylene during the experiment was 53.02% and ethylene increment （volume fraction）over 0.33%. Furthermore, this catalyst might be used under a wider range of process conditions, especially under high space velocity and high alkyne content. It could be safely applied commercially.

关 键 词：催化剂 选择加氢 碳二馏分 乙烯 乙炔 绿油 

分 类 号：TQ221.211[化学工程—有机化工]