期刊
CATALYSTS
卷 7, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/catal7040118
关键词
solid acid catalyst; xylan; xylose; conversion; furfural; biphasic system
资金
- Program for National Natural Science Foundation of China [21576103]
- Guangdong Natural Science Funds for Distinguished Young Scholar [S20120011250]
- Guangzhou science and technology plan project [201707010059]
A sulphated tin ion-exchanged montmorillonite (SO42-/Sn-MMT) was successfully prepared by the ion exchange method of montmorillonite (MMT) with SnCl4, followed by the sulphation. This catalysis was applied as a solid acid catalyst for the heterogeneous catalytic transformations of xylose and xylan into furfural in the bio-based 2-methyltetrahydrofuran/H2O biphasic system. These prepared catalysts were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), temperature programmed desorption of ammonia (NH3-TPD), pyridine adsorbed Fourier transform infrared spectroscopy (Py-FTIR), element analysis (EA) and Brunauer-Emmett-Teller (BET) method. Their catalytic performance for xylose and xylan into furfural was also investigated. The reaction parameters such as the initial xylose and xylan concentration, the amounts of catalyst, the organic-to-aqueous phase volume ratio, the reaction temperature and time were studied to optimize the reaction conditions. Results displayed that SO42-/Sn-MMT contained both Bronsted acid and Lewis acid sites, and SO42- ions were contributive to the formation of stronger Bronsted acid sites, which could improve the reaction efficiency. Reaction parameters had significant influence on the furfural production. The substitution of water by the saturated NaCl solution in the aqueous phase also had an important effect on the xylose and xylan conversion. The highest furfural yields were achieved up to 79.64% from xylose and 77.35% from xylan under the optimized reaction conditions (160 degrees C, 120 min; 160 degrees C, 90 min). Moreover, the prepared catalyst was stable and was reused five times with a slight decrease (10.0%) of the furfural yield.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据