燃料化学学报2017，Vol.45Issue(6)：651-659,9.
Nb-P/SBA-15催化剂的制备及其对果糖水解制5-羟甲基糠醛的催化性能
Preparation of the Nb-P/SBA-15 catalyst and its performance in the dehydration of fructose to 5-hydroxymethylfurfural
摘要
Abstract
Dehydration of fructose to 5-hydroxymethylfurfural (5-HMF) is one of the pivotal reactions in conversion of biomass towards valuable platform compounds.In this work, Nb/SBA-15 was prepared via incipient wetness impregnation with self-made SBA-15 as support;Nb/SBA-15 was further treated with phosphoric acid and calcined at 450 ℃, to obtain the Nb-P/SBA-15 catalyst.The Nb-P/SBA-15 catalyst was characterized by SEM, TEM, BET, XRD and NH3-TPD;its performance in the dehydration of fructose to 5-HMF was then investigated.The results indicate that the microscopic structure of SBA-15 is well preserved in Nb/SBA-15 with an internal channel diameter of about 10 nm and the niobic species are highly dispersed on the surface of the channels;the wall of channels became thinner after impregnation of Nb and treatment with phosphoric acid.After the treatment with phosphoric acid, the weak acid sites are increased, moreover, the medium and strong acidic sites are generated in Nb-P/SBA-15;as a result, for the dehydration of fructose in a water/MIBK biphasic system, Nb-P/SBA-15 exhibits higher catalytic activity and selectivity to 5-HMF.By reaction at 160 ℃ for 1.5 h, with a water/MIBK volume ratio of 1/2, the conversion of fructose and the yield of 5-HMF reach 96.1% and 92.6%, respectively.Moreover, the Nb-P/SBA-15 catalyst also exhibits excellent stability in view of water tolerance;it still demonstrates high catalytic activity and selectivity to 5-HMF even after successive recycling for four times.关键词
铌酸/磷酸处理/果糖/水解/5-羟甲基糠醛/Nb-P/SBA-15Key words
niobic acid/phosphoric treatment/fructose/hydration/5-hydroxymethyl furfural (5-HMF)/Nb-P/SBA-15分类
化学化工引用本文复制引用
朱丽伟,王建刚,赵萍萍,宋峰,孙秀玉,王丽红,崔洪友,易维明..Nb-P/SBA-15催化剂的制备及其对果糖水解制5-羟甲基糠醛的催化性能[J].燃料化学学报,2017,45(6):651-659,9.基金项目
The project was supported by the National Natural Science Foundations of China (21476132, 51536009, 51406109 and 21506118) and National High Technology Research and Development Program of China(863 program, 2012AA101808) （21476132, 51536009, 51406109 and 21506118）
国家自然科学基金(21476132, 51536009, 51406109, 21506118)和国家高技术研究发展计划(863 计划, 2012AA101808)资助 （21476132, 51536009, 51406109, 21506118）
