Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016, India.
Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016, India.
Bioresour Technol. 2016 Nov;220:394-400. doi: 10.1016/j.biortech.2016.08.109. Epub 2016 Aug 31.
The transformation of lignocellulosic biomass to value added chemicals in a synergetic effect of sulfated zirconia (SZ) catalyst and ionic liquid was found to effectively depolymerize microcrystalline cellulose (MCC) to sugars and dehydrate sugars to 5-hydroxylmethylfurfural (5-HMF) and levulinic acid (LA). SZ was catalyst synthesized by wet impregnation method with predetermined concentration of sulphuric acid and then characterized using techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), BET-surface area analyzer, thermo-gravimetric analysis (TGA) and temperature programmed desorption of ammonia (Ammonia-TPD). SZ catalyst was effective in depolymerizing MCC yielding a maximum of total reducing sugar (TRS) of 57% (38% glucose and 14% fructose), 9.5% LA and 5.1 of 5-HMF at a temperature of 180°C and 3h of depolymerization time. In addition, SZ was tested for dehydration of glucose and fructose and a yield of 26% and 62% of 5-HMF were obtained, respectively.
在硫酸锆 (SZ) 催化剂和离子液体的协同作用下，将木质纤维素生物质转化为增值化学品，可有效将微晶纤维素 (MCC) 解聚为糖，并将糖脱水为 5-羟甲基糠醛 (5-HMF) 和乙酰丙酸 (LA)。SZ 是通过湿法浸渍法用预定浓度的硫酸合成的，然后使用 X 射线衍射 (XRD)、傅里叶变换红外光谱 (FTIR)、BET 表面积分析仪、热重分析 (TGA) 和氨程序升温脱附 (Ammonia-TPD) 等技术进行了表征。SZ 催化剂在解聚 MCC 方面非常有效，在 180°C 和 3 小时的解聚时间下，可得到最高达 57%（38%葡萄糖和 14%果糖）的总还原糖 (TRS)、9.5%的 LA 和 5.1%的 5-HMF。此外，SZ 还用于葡萄糖和果糖的脱水，分别得到 26%和 62%的 5-HMF 收率。
Zotero 插件