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Ru5/HZSM-TiO2加氢解聚二苯醚的研究

发表时间:2021-12-31  浏览量:604  下载量:83
全部作者: 樊锡琳,李磊,王学,邓甜甜,陈博
作者单位: 西北大学化工学院;西安巨子生物基因技术股份有限公司
摘 要: 加氢解聚是温和条件下从煤直接获取高附加值化学品的有效途径。采用蒸汽辅助结晶法制备了一系列HZSM-TiO2复合载体,并采用等体积浸渍法制备了双功能催化剂Ru5/HZSM-TiO2. 利用X射线衍射(X-ray dif-fraction,XRD)、氨气程序升温脱附(NH3-temperature programmed desorption,NH3-TPD)、吡啶吸附红外(pyridine adsorption infrared,Py-IR)、扫描电子显微镜(scanning electron microscope,SEM)和透射电子显微镜(transmission electron microscope,TEM)等手段对所制备的催化剂和/或其对应的复合载体进行了表征。以二苯醚的加氢解聚为探针反应,在250℃和0.2 MPa H2条件下考察了催化剂Ru5/HZSM-TiO2加氢解聚4—O—5类型醚键的反应性。结果表明,催化剂的Lewis酸性显著影响二苯醚加氢解聚的反应性和选择性,Ru5/1HZSM-1TiO2(加料质量比mTiO2/mHZSM=1)催化加氢解聚二苯醚的转化率为97.2%,苯收率高达57.8%.
关 键 词: 煤化学工程;双功能催化剂;加氢解聚;含氧键
Title: Catalytic hydrogenolysis of diphenyl ether by Ru5/HZSM-TiO2
Author: FAN Xilin, LI Lei, WANG Xue, DENG Tiantian, CHEN Bo
Organization: School of Chemical Engineering, Northwest University; Xi’an Giant Biological Gene Technology Co. Ltd.
Abstract: Hydrogenolysis is an efficient approach to directly obtain high value-added chemicals from lignites under a mild condition. A series of HZSM-TiO2 composite supports were synthesized by steam-assisted crystallization method, and Ru5/HZSM-TiO2 bifunctional catalyses were further prepared by incipient-wetness impregnation method. The as-prepared catalyses or/and their related composite supports were characterized by multiple advanced analytical instruments, such as X-ray diffraction (XRD), NH3-temperature programmed desorption (NH3-TPD), pyridine adsorption infrared (Py-IR), scanning electron microscope (SEM) and transmission electron microscope (TEM). The catalytic reactivity of Ru5/HZSM-TiO2 was investigated at 250℃ under 0.2 MPa H2 using hydrogenolysis of diphenyl ether as probe reaction. The results revealed that the Lewis acidity of the catalyst significantly affected its reactivity and selectivity for the hydrogenolysis of diphenyl ether. The highest conversion of diphenyl ether (97.2%) and yield of benzene (57.8%) were simultaneously obtained by Ru5/1HZSM-1TiO2 (mass ratio mTiO2/mHZSM=1).
Key words: coal chemical engineering; bifunctional catalyst; hydrogenolysis; oxygen-containing bond
发表期数: 2021年12月第4期
引用格式: 樊锡琳,李磊,王学,等. Ru5/HZSM-TiO2加氢解聚二苯醚的研究[J]. 中国科技论文在线精品论文,2021,14(4):550-555.
 
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