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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 大连理工大学成都研究院院长
性别:男
毕业院校:中科院大连化学物理研究所
学位:博士
所在单位:化工学院
学科:化学工艺. 物理化学. 功能材料化学与化工
办公地点:大连理工大学西部校区化工综合楼A401室
联系方式:辽宁省大连市高新区凌工路2号,邮编116024
电子邮箱:changhai@dlut.edu.cn
Highly Stable Nb2O5-Al2O3 Composites Supported Pt Catalysts for Hydrodeoxygenation of Diphenyl Ether
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论文类型:期刊论文
发表时间:2017-11-29
发表刊物:INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
收录刊物:SCIE、EI
卷号:56
期号:47
页面范围:14034-14042
ISSN号:0888-5885
摘要:Various TiO2, SiO2, Al2O3, and Nb2O5-Al2O3 supported Pt catalysts have been prepared by urea precipitation method for catalytic hydrodeoxygenation (HDO) of diphenyl ether (DPE) as a 4-O-5 aryl-ether lignin model compound. The selectivity toward deoxygenated product cyclohexane increased obviously with Nb2O5-nH(2)O decorated, owing to the significant promotion effect of NbOx species and acid sites on C-O bond cleavage. At higher pressure (3.0 MPa H-2), DPE underwent a HYD route, while direct hydrogenolysis route occurred at low pressure (0.1 MPa H-2). In addition, the reaction rate constants and activation energies were obtained in the temperature range from 160 to 220 degrees C. Based, on the Arrhenius law, the activation energy for the cleavage of the C-O bond in DPE was calculated to be 91.22 kJ/mol. It was noteworthy that the Pt/20Nb Al2O3 showed higher stability than Pt/Al2O3 for hydrodeoxygenation of diphenyl ether, which can be attributed to its water -tolerant Lewis acid sites.