Catalytic hydrolysis of corncob cellulosic polysaccharide into saccharides using SnO2-Co3O4/C biochar catalyst
Catalytic hydrolysis of corncob cellulosic polysaccharide into saccharides using SnO2-Co3O4/C biochar catalyst
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DOI：
10.1007/s13726-020-00805-9
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发表时间：
2020-03
影响因子：
3.1
通讯作者：
Qing-yan Liu;Hongxian Fan;J. Qi;Songmei Zhang;Gang Li
中科院分区：
文献类型：
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作者：
Qing-yan Liu;Hongxian Fan;J. Qi;Songmei Zhang;Gang Li
以SnO 2-Co 3 O 4/C生物炭为催化剂，对玉米芯中的纤维素多糖进行水热分解，得到木糖、甘露糖、半乳糖、葡萄糖、木酮糖、阿拉伯糖、果糖、麦芽糖和蔗糖等9种可溶性单糖。H3 O+可将半纤维素和纤维素转化为可溶性糖，SnO 2-Co 3 O 4 -2/C催化剂上的刘易斯酸中心使木糖异构化为木酮糖或阿拉伯糖，葡萄糖异构化为果糖。由于催化剂的酸强度，木酮糖和果糖将进一步脱水成小的化合物。延长反应时间可使单糖缩合生成麦芽糖和蔗糖。在优化的操作条件下，当5g干燥玉米芯颗粒、0.3g SnO 2-Co 3 O 4/C生物炭催化剂和100 mL水在180 °C下反应170 min时，还原糖的最大产率可达83.3%。
This paper presents hydrothermal decomposition of cellulosic polysaccharides in corncob using SnO2-Co3O4/C biochar catalyst to nine soluble monosaccharides including xylose, mannose, galactose, glucose, xylulose, arabinose, fructose, maltose and sucrose. H3O+can convert hemicellulose and cellulose to soluble sugars by saccharification, following the Lewis acid sites from SnO2-Co3O4-2/C catalyst make the isomerization of xylose to xylulose or arabinose, as well as glucose to fructose. The xylulose and fructose would be furthermore dehydrated to small compounds due to the acid strength of catalyst. Maltose and sucrose could be produced by the condensation of monosaccharides with prolonged reaction time. The maximum yield of reducing sugars reached 83.3% under the optimized operation condition as 5 g dried corncob particles, 0.3 g SnO2-Co3O4/C biochar catalyst and 100 mL H2O charged in the reactor at 180 °C for duration of 170 min.