Direct Production of Ethyl Levulinate from Carbohydrates Catalyzed by H-ZSM-5 Supported Phosphotungstic Acid

BioResources

Guizhuan Xu¹  Chun Chang¹  Shuqi Fang¹  Junli Chang²  Jing Bai³  Ze Liu⁴  Shiqiang Zhao⁴ 

[1] China;Henan Agricultural University;School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, 450001, China;Zhengzhou University;

关键词: Ethyl levulinate;    Carbohydrates;    H-ZSM-5;    Phosphotungstic acid;   

DOI  :  10.15376/biores.10.2.2223-2234

来源: DOAJ

【 摘 要 】

A series of supported phosphotungstic acid (H3PW12O40, HPW) catalysts, including HPW/β, HPW/Sn-β, HPW/H-Y, HPW/H-ZSM-5, HPW/USY, HPW/ReUSY, and HPW/SBA-15, were prepared using an impregnation method for alcoholysis of fructose to ethyl levulinate in ethanol. Among these catalysts, HPW/H-ZSM-5 showed the highest catalytic activity, and the yield of ethyl levulinate from fructose increased with increasing phosphotungstic acid loading. The yield of ethyl levulinate reached 43.1% at 160 °C for 2 h over 20 wt.% HPW/H-ZSM-5, and the solid catalyst could be reused at least three times. EL yields of 19.1%, 27.3%, 37.4%, and 8.7% could be obtained from glucose, sucrose, inulin, and cellulose, respectively. Furthermore, the catalysts were characterized by BET surface area, X-ray diffraction, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. HPW/H-ZSM-5 showed good catalytic activity for the direct production of ethyl levulinate from fructose.

【 授权许可】

Unknown