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首页> 外文期刊>Catalysis science & technology >Lanthanum oxycarbonate modified Cu/Al2O3 catalysts for selective hydrogenolysis of glucose to propylene glycol: base site requirements
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Lanthanum oxycarbonate modified Cu/Al2O3 catalysts for selective hydrogenolysis of glucose to propylene glycol: base site requirements

机译：oxycarbonate镧改性铜/氧化铝催化剂葡萄糖的选择性氢解作用丙二醇:基地网站的需求

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摘要

This work reports on the base properties of La2O2CO3-Cu/Al2O3 catalysts and their effect on the catalyst's performance in the aqueous hydrogenolysis of glucose to propylene glycol. The catalysts show promising performance in glucose isomerisation, C-C bond cleavage of fructose and hydrogenation of the resulting fragments. The base properties of the catalyst influence the selectivity. More specifically, the basicity of the catalyst facilitates the isomerisation of glucose to fructose and the C-C bond cleavage of fructose to produce lighter products. This is evidenced by the correlation between the acid-base properties of the catalysts and their catalytic performance. In contrast, acid sites promote side reactions such as condensation reactions. Based on this study, a surface reaction mechanism is proposed for the first step of the tandem reactions, the isomerisation of glucose to fructose. The effect of the reaction time and temperature on the product distribution was investigated to get more insight into the reaction pathways. In this regard, the conversion of intermediates was also investigated. Then, a reaction mechanism was proposed based on the findings of this study and previous works.
机译：这项工作报告的基本属性La2O2CO3-Cu /氧化铝催化剂及其影响水的催化剂的性能丙二醇氢解作用的葡萄糖。催化剂表现出有前途的表现葡萄糖异构化,碳碳键的乳沟果糖和加氢生成的碎片。影响选择性。促进了碱度的催化剂异构化葡萄糖果糖和碳碳债券的乳沟果糖生产打火机产品。酸碱属性之间的催化剂及其催化性能。酸网站推广等副反应缩合反应。表面反应机理提出了串联反应的第一步异构化葡萄糖果糖。反应的时间和温度产品分布来获得更多的调查洞察的反应途径。方面,中间体也的转换调查。基于本研究的发现和建议以前的作品。

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