Ru5%/HZSM-TiO2加氢解聚二苯醚的研究
首发时间:2021-04-07
摘要:采用蒸汽辅助结晶法制备了HZSM-TiO2复合载体,并制备了双功能催化剂Ru5%/HZSM-TiO2,利用X-射线衍射(XRD)、吡啶吸附红外(Py-IR)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等手段对所制备催化剂进行了表征。在250 oC和0.2 MPa H2条件下考察了催化剂Ru5%/HZSM-TiO2加氢解聚二苯醚的反应性。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%/HZSM-TiO2(加料比mTiO2/mHZSM=1)催化加氢解聚二苯醚的转化率为97.2%,苯收率高达到57.8%。
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Catalytica hydrogenolysis of diphenyl ether by Ru5%/HZSM-TiO2
Abstract:A series of HZSM-TiO2 composite supports were synthesised 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), pyridine adsorption infrared (Py-IR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The catalytic reactivity of Ru5%/HZSM-TiO2 was investigated at 250 oC under 0.2 MPa 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.
Keywords: hydrogenolysis diphenyl ether molecular sieve oxygen-containing bond
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