Preparation of biochar catalyst with saccharide and lignocellulose residues of corncob degradation for corncob hydrolysis into furfural
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- 作者：Qing-yan Liu ; Fang Yang ; Xiao-feng Sun…
- 关键词：Corncob ; Biochar catalyst ; Hydrothermal degradation ; Furfural
- 刊名：Journal of Material Cycles and Waste Management
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：19
- 期：1
- 页码：134-143
- 全文大小：
- 刊物类别：Earth and Environmental Science
- 刊物主题：Civil Engineering; Waste Management/Waste Technology; Environmental Management;
- 出版者：Springer Japan
- ISSN：1611-8227
- 卷排序：19
文摘
This paper presented a novel process for production of furfural by hydrothermal degradation of corncob over biochar catalyst, in which it was prepared with the recycling degradation solution and lignocellulosic solid residues. The biochar catalyst was papered by lignocellulose residues and concentrated saccharide solution, and then impregnated in 0.5 mol/L sulphuric acid at room temperature for 24 h assisted by the ultrasonic vibration. In the system of recycling, 8.8 % lignocellulose residues and 100 % concentrated saccharide solution from corncob hydrolysis have been recycled. Hydrolysis of corncob was carried out at 180 °C for duration of 170 min over the biochar catalyst. The experimental results have shown that the furfural yield of up to 37.75 % and overall corncob conversion rate of 62.00 % could be achieved under optimum operating conditions for the catalysts preparation and the corncob hydrolysis. It is believed that the acid density of 4.27 mmol/g of biochar catalyst makes the SO3H groups cleave β-1,4 glycosidic linkages effectively and hydrolyze the cellulose and hemicellulose to water-soluble sugars, as well as to facilitate dehydration of xylose to give the product of furfural.