物理化学学报2017，Vol.33Issue(11)：2301-2309,9.DOI:10.3866/PKU.WHXB201705261
无额外供氢体下负载型MoFeOx催化剂催化甘油制丙烯醇
MoFeOx-Supported Catalysts for the Catalytic Conversion of Glycerol to Allyl Alcohol without External Hydrogen Donors
摘要
Abstract
Supported MoFe/X (X =SnO2,ZrO2,CeO2,TiO2,CNTs (Carbon nano-tubes)),MgO and MoFe oxide catalysts were prepared for use in the catalytic conversion of glycerol to allyl alcohol.The prepared catalysts were characterized by XRD,BET,XPS,H2-TPR,and NH3-TPD.The results showed that Fe and Mo oxides with high chemical value (Fe3+ and Mo6+) predominated in MoFe/X MoFe oxide catalysts,which exhibited only weakly acidic properties.The applied supports with different physicochemical characteristics showed distinct interactions with Mo and Fe oxides,modifying the concentration of surface weak acid site,acid strength,and reducibility of MoFe/X oxide catalysts.The catalysts,based on their catalytic performance for glycerol conversion to allyl alcohol,can be ranked in terms of allyl alcohol yield as MoFe/TiO2 ＞ MoFe/CeO2 ＞ MoFe/ZrO2 ＞ MoFe/CNTs ＞＞ MoFe/SnO2 ＞MoFe ＞＞ MoFe/MgO.Over the MoFe/TiO2,a maximum allyl alcohol yield of 22.3％ was from glycerol conversion of 83.4％,which had a selectivity of 26.7％.The MoFe/TiO2 also showed higher catalytic stability than the MoFe/CeO2,MoFe/ZrO2,and MoFe/CNTs oxide catalysts.The glycerol conversion showed positive relationship with the surface weak acid concentration of MoFe and MoFe/X catalysts,while the allyl alcohol was produced over the redox sites (non-acid sites) of catalysts.With increasing reaction temperature,the glycerol conversion increased,while the allyl alcohol selectivity decreased,over the MoFe/X oxide catalysts.关键词
Fe-Mo氧化物催化剂/TiO2/气固多相催化/甘油/丙烯醇Key words
Fe-Mo oxide catalysts/TiO2/Gas-solid heterogeneous catalysis/Glycerol/Allyl alcohol分类
化学化工引用本文复制引用
兰海,肖熙,袁善良,张彪,周桂林,蒋毅..无额外供氢体下负载型MoFeOx催化剂催化甘油制丙烯醇[J].物理化学学报,2017,33(11):2301-2309,9.基金项目
The project was supported by CAS “light of West China” Program 2015.中国科学院“西部之光”项目 （）
