磷改性失活TS-1高效催化C_(5)=裂解制备C_(2)=/C_(3)=反应的研究  

P-Modified Deactivated TS-1 as an Efficient Catalyst for Catalytic Cracking of Pentene to Ethene and Propene

作　　者：徐德义 丁超俊 李芳 刘月明 何鸣元 XU Deyi;DING Chaojun;LI Fang;LIU Yueming;HE Mingyuan(Shanghai Key Laboratory of Green Chemistry and Chemical Processes,School of Chemistry and Molecular Engineering,East China Normal University,Shanghai 200062,China;Institute of Eco-Chongming,Shanghai 202162,China)

机构地区：[1]华东师范大学化学与分子工程学院,上海市绿色化学与化工过程绿色化重点实验室,上海200062 [2]崇明生态研究院,上海202162

出　　处：《高等学校化学学报》2023年第8期141-149,共9页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:22072044);华东师范大学“幸福之花”研究基金(批准号:2020ST2203)资助.

摘　　要：发展C_(5)=催化裂解高效制乙烯和丙烯(C_(2)=/C_(3)=)技术具有重要的研究意义及工业应用价值,其核心在于高效催化剂的开发.本文发展了以失活钛硅分子筛TS-1(De-TS-1)为催化剂的C_(5)=催化裂解过程,研究发现,P改性后的De-TS-1显示出优异的催化反应性能,C_(2)=+C_(3)=选择性与单程寿命分别达77.1%和213 h,其综合催化性能优于经典的ZSM-5催化剂.进一步研究表明,De-TS-1的Brønsted性质符合C_(5)=裂解高效裂解的基本要求,P改性可进一步降低De-TS-1中Brønsted酸的酸密度和酸强度,从而促进了目标产物C_(2)=/C_(3)=生成的主反应,抑制了C_(5)=裂解过程中氢转移、芳烃异构化等副反应.以De-TS-1为催化剂高效催化C_(5)=裂解过程的研发,为废催化剂的资源化利用提供新思路的同时,也提供了发展新型固体酸催化剂的新方案.The development of catalytic cracking of pentene to ethene and propene has very important research significance and industrial application value.Its core is high-effciency catalysts.Here,deactivated titanium silicalite-1(De-TS-1)was developed as catalyst for catalytic cracking of pentene.And P-modified De-TS-1 shows excellent catalytic performance,the ethene and propene selectivity and single-run lifetime reach 77.1%and 213 h,respectively.Its comprehensive catalytic performance is better than that of the classical ZSM-5 catalyst.Further studies show that the Brønsted properties of De-TS-1 satisfy the basic requirements for high-efficiency cracking of pentene.P modifica⁃tion can further reduce the acid density and acid strength of Brønsted acid in De-TS-1,promoting the main reaction of the target products ethene and propene,and inhibiting the side reactions such as hydrogen transfer reaction and aromatics isomerization reaction during pentene cracking.This development of De-TS-1 as a high efficiency catalyst for pentene cracking process provides a new idea for the recycling of waste catalyst and a new scheme for the develop⁃ment of new solid acid catalyst.

关 键 词：烯烃裂解 失活钛硅分子筛 氢转移反应 Brønsted酸 废催化剂利用 

分 类 号：O643.3[理学—物理化学]