生物质化学工程2026，Vol.60Issue(1)：10-20,11.DOI:10.3969/j.issn.1673-5854.2026.01.002
Au/CuxCey催化甘油氧化制二羟基丙酮的性能及失活机制研究
Catalytic Performance and Deactivation Mechanism of Au/CuxCey Composites for Glycerol Oxidation to Dihydroxyacetone
摘要
Abstract
The development of biodiesel had caused a serious surplus of glycerol production.It was of great significance to explore the catalytic technology for the conversion of glycerol into high value-added chemicals.In this study,a series of Au/CuxCey catalysts with different n(Cu)∶n(Ce)ratios were prepared and their catalytic performance for selective oxidation of glycerol to dihydroxyacetone(DHA)in a non-alkaline medium was systematically evaluated.By means of X-ray diffraction(XRD),transmission electron microscope(TEM),X-ray photoelectron spectroscopy(XPS),carbon dioxide temperature programmed desorption(CO2-TPD)and hydrogen temperature-programmed reduction(H2-TPR),the effects of n(Cu)∶n(Ce)on Au0 content.Au particle size,redox properties,surface basicity and glycerol conversion activity of the carrier were clarified.Among them,the catalyst Au/Cu9 Ce1 prepared at n(Cu)∶n(Ce)=9∶1 catalyzed the glycerol oxidation reaction under the mild conditions of low Au loading(1.2%),60℃and PO2=0.5 MP a.The glycerol conversion rate was as high as 86.7%,and the DHA selectivity was73.4%.In addition,the stability test of the catalyst Au/Cu9 Ce1 revealed a significant decline after five times of reaction.The combined characterization results indicated that the catalyst's deactivation was mainly due to two aspects:firstly,the surface area carbon,which covered the active sites and hindered the contact of reactants as well as reduced the catalytic efficiency;secondly,the significant decrease in the lattice oxygen content weakened the catalyst's redox ability,resulting in a substantial drop in reaction activity.关键词
甘油/二羟基丙酮/Au基催化剂/非碱性介质/失活机制Key words
glycerol/dihydroxyacetone/Au-based catalyst/non-alkaline medium/deactivation mechanism分类
化学化工引用本文复制引用
张启航,李枫,崔海涛,陈伦刚,马隆龙,李磊..Au/CuxCey催化甘油氧化制二羟基丙酮的性能及失活机制研究[J].生物质化学工程,2026,60(1):10-20,11.基金项目
山西省科技创新人才团队专项资助项目(202204051001012) （202204051001012）
企业合作项目(2021WT08) （2021WT08）
