College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei Provience 050018, PR China.
College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei Provience 050018, PR China.
Carbohydr Polym. 2019 May 15;212:289-296. doi: 10.1016/j.carbpol.2019.02.050. Epub 2019 Feb 19.
Degradation of cellulose to reducing sugar is the key step for the conversion of cellulose to valuable chemicals. Cellulose was degraded by WCl in 1-butyl-3-methyl imidazole chloride at 80 °C and lower. 83% and 85.5% yield of total reducing sugar was gotten at 70 and 80 °C, respectively. Compared with inorganic acid, heteropoly acid, acidic ionic liquid and other metal chlorides, WCl has shown better catalytic performance for degradation of cellulose to reducing sugar. The effect of reaction temperature, reaction time, WCl amount and cellulose concentration were investigated. Degradation of cellulose by WCl in 1-butyl-3-methyl imidazole chloride is a zero reaction. WCl also showed excellent catalytic performance for the degradation of nature cellulose and lignocellulose. Catalyst can be reused at least 5 times without decrease of reducing sugar yield. The mechanism of degradation of WCl was also suggested.
纤维素降解为还原糖是将纤维素转化为有价值化学品的关键步骤。在 80°C 及以下温度下，WCl 在 1-丁基-3-甲基咪唑氯盐中将纤维素降解。在 70°C 和 80°C 时，总还原糖的收率分别为 83%和 85.5%。与无机酸、杂多酸、酸性离子液体和其他金属氯化物相比，WCl 在纤维素降解为还原糖方面表现出更好的催化性能。考察了反应温度、反应时间、WCl 用量和纤维素浓度的影响。WCl 在 1-丁基-3-甲基咪唑氯盐中的纤维素降解是零反应。WCl 对天然纤维素和木质纤维素的降解也表现出优异的催化性能。催化剂至少可重复使用 5 次，还原糖收率没有下降。还提出了 WCl 降解的机理。
