生物加工过程2018，Vol.16Issue(1)：75-81,7.DOI:10.3969/j.issn.1672-3678.2018.01.009
柠檬酸改性USY催化纤维素合成乙酰丙酸乙酯
Synthesis of ethyl levulinate from cellulose catalyzed by ultra-stable zeolite ( USY) modified with citric acid
摘要
Abstract
Ultra-stable Y zeolite ( USY ) was dealuminated by citric acid of 0. 2 mol/L, and the dealuminated USY( DUSY) was used as solid acid catalyst for the synthesis of ethyl levulinate( EL) from cellulose.The initial USY and modified DUSY were characterized by X ray diffraction (XRD),Fourier translation-infrared spectroscopy ( FT-IR ) , Brunner-Emmet-Teller ( BET ) measurements, pyridine adsorption infrared spectroscopy(Py-IR) and NH3-temperature programmed desorption(NH3-TPD).The porous structure of USY was enriched,and the Lewis acidity was also enhanced. Meanwhile,the catalytic ability of USY for the synthesis of EL from cellulose was improved. Moreover, the conditions of EL synthesis from cellulose catalyzed by DUSY were optimized.Under the conditions of cellulose 0. 6 g,DUSY 0. 3 g,at 220 ℃ for 3 h,36. 1％ of the EL yield was achieved,and DUSY could be used repeatedly. Furthermore,EL synthesis from different carbohydrates was compared,the EL yield from fructose,glucose, sucrose and inulin were 50. 7％,41. 0％,47. 9％ and 42. 9％,respectively.关键词
分子筛/固体酸/乙酰丙酸乙酯/纤维素Key words
zeolite/solid acid/ethyl levulinate/cellulose分类
化学化工引用本文复制引用
常春,肖泽,何玉远,邓琳,戚小各,徐艳丽..柠檬酸改性USY催化纤维素合成乙酰丙酸乙酯[J].生物加工过程,2018,16(1):75-81,7.基金项目
河南省自然科学基金(162300410247) （162300410247）
郑州大学研究生自主创新项目 （）
