水对ZSM-11分子筛上干气芳构化反应性能的影响  

Effect of water on reaction performance in dry gas aromatization over ZSM-11 zeolite catalyst

作　　者：李文亮[1,2] 朱向学[1] 刘盛林[1] 张爽[1] 谢素娟[1] 刘善和 谷顺明 徐龙伢[1] 曾蓬[4] 

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]中国科学院大学,北京100049 [3]安徽国星生物化学有限公司,安徽当涂243100 [4]中国寰球工程公司辽宁分公司,辽宁抚顺113006

出　　处：《天然气化工—C1化学与化工》2016年第2期1-7,24,共8页Natural Gas Chemical Industry

基　　金：王宽诚教育基金会;中科院青年创新促进会(20120155)

摘　　要：考察了水的添加对ZSM-11分子筛催化剂(Cat-550)上干气芳构化反应性能的影响,反应后催化剂采用XRD、N_2物理吸附-脱附、NMR与TPO技术进行表征。结果表明,水的添加可以抑制干气中乙烯转化为乙烷,并促进乙烯转化为液化气和油。随着水蒸汽/干气比的增加,Cat-550催化剂稳定性首先增加,然后下降;反应后样品的积炭量也是先增加,后下降。积炭的生成是影响催化剂稳定性的主要因素。反应中水不会与烃类发生重整反应,但可能与催化剂本身发生作用,使样品的酸性发生变化,从而引起反应性能的变化。Effect of water on reaction performance in the dry gas aromatization over ZSM-11 zeolite catalyst（Cat-550） was investigated. All the catalyst samples used were characterized by XRD, N_2 absorption-desorption, NMR and TPO. Results showed that water addition could enhance C_2H_4 in dry gas converting to liquefied petroleum gas and oil by suppressing C_2H_6 formation from C_2H_4.Increasing the water/dry gas ratio in the feed, the stability of Cat-550 first increased, and then decreased. The coke deposition amount followed the similar principle, which mainly affected the reaction stability. Water did not involve in the reforming reaction of hydrocarbons, but maybe interacted with the catalyst, resulting into the changes of catalyst acidity and reaction performance.

关 键 词：干气芳构化 水的添加 ZSM-11 

分 类 号：O643.3[理学—物理化学] TQ426[理学—化学]