磷酸氧钛负载钌双功能催化剂催化纤维素转化制山梨醇

摘要

山梨醇是纤维素催化加氢转化中重要的平台化合物之一。制备了固体酸磷酸氧钛TiOPO₄及磷酸氧钛负载钌Ru/TiOPO₄双功能催化剂，首先对磷酸氧钛催化纤维素水解反应进行研究，以葡萄糖收率为目标，考察了反应时间、氢压、温度的影响，得到了最适宜水解反应条件。在此基础上，以磷酸氧钛负载钌为催化剂，对其催化纤维素制山梨醇的催化性能进行研究，结果表明，水解加氢反应中，在反应温度（453 K）稍低于最适宜水解温度（463 K），反应时间（150 min）略短于最适宜水解时间（180 min）的反应条件下进行反应可得到更好的效果，最高山梨醇收率为77.6%，纤维素转化率99.3%。改变不同催化剂与底物之比，研究水解反应与水解加氢反应的转化率、产物分布，结果表明，双功能催化剂Ru/TPO可以使葡萄糖快速进行加氢反应，减少葡萄糖进一步降解的发生，液相中碳回收率显著提高，可达80%以上。

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	张妤
	韩金玉
	王华
	郭颍歌

关键词：磷酸氧钛；双功能催化剂；固体酸；山梨醇；催化

Abstract：

Sorbitol is one of valuable platform molecules in the cellulose hydro-conversion. The solid acid titanium phosphate, TiOPO₄ and bifunctional catalyst titanium phosphate support Ru, Ru/TiOPO₄ were prepared. At first, aiming at yielding high glucose, we systematically investigated the influence of reaction time, hydrogen pressure and temperature in cellulose hydrolysis reaction catalyzed by titanium phosphate. Basing on the optimization result of cellulose hydrolysis reaction, we studied the hydrogenation reaction of cellulose conversion to sorbitol catalyzed by titanium phosphate support Ru. Experiments results proved that a better sorbitol yield could be obtained under the reaction condition which the hydrogenation reaction temperature (453 K) is slightly lower than the optimial hydrolysis temperature(463 K) and the hydrogenation time is also a little lower than optimal hydrolysis time. After optimization, the highest sorbitol yield of 77.6% was obtained, with the conversion 99.3%. We can draw a conclusion through various ratio of catalyst and cellulose experiments that the existence of the bifunctional catalyst Ru/TPO can hydrogenate in a great degree, reduce further degradation of glucose and the carbon recovery have significantly be improved, which can get more than 80%.

Keywords： titanium oxophosphate； bifunctional catalyst； solid acid； sorbitol； catalysis

Received 2015-03-18;

Fund:

国家自然科学基金（21076152, 21276191）；教育部博士点基金（2100032110018）

Corresponding Authors: 王华,E-mail:tjuwanghua@tju.edu.cn。 Email: tjuwanghua@tju.edu.cn

About author: 张妤(1989-),女,硕士研究生,现从事生物质转化的研究。

引用本文:

张妤, 韩金玉, 王华, 郭颍歌.磷酸氧钛负载钌双功能催化剂催化纤维素转化制山梨醇[J]. 化学工业与工程, 2017,34(1): 1-8,18

Zhang Yu, Han Jinyu, Wang Hua, Guo Yingge.Titanium Phosphate Support Ru Bifunctional Catalyst Catalyze Cellulose into Sorbitol[J]. Chemcial Industry and Engineering, 2017,34(1): 1-8,18

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