Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 Zhejiang, China.
Bioresour Technol. 2012 Sep;119:48-54. doi: 10.1016/j.biortech.2012.05.113. Epub 2012 Jun 1.
The effects of 15 inorganic and organic acid potassium salts on hydrothermal decomposition of glucose, fructose and 5-hydroxymethylfurfural (5-HMF) were investigated at 180°C. The rate constants for glucose, fructose and 5-HMF decomposition with anions were calculated by a pseudo first-order equation, and the impact factors of the rate constants were calculated, to demonstrate the catalytic effect of the different anions. Compared to the results without added salts, chloride, bromide, iodide and nitrate anions did not significantly accelerate the decomposition rate of glucose or improve the selectivity for 5-HMF, but increased the decomposition rate of fructose from 19% to 44%, and improved the selectivity for 5-HMF by 4-29%. Phosphate, fluoride, sulfate and all organic acid anions increased the decomposition rate of glucose and fructose by 23-2781%, but lowered the selectivity for 5-HMF from 36% to 100% as compared to the results without added salts. These findings provide insights on the reactivity and mechanism of the hydrothermal decomposition of glucose and fructose with inorganic and organic salts.
研究了 15 种无机和有机酸钾盐在 180°C 下水热条件下对葡萄糖、果糖和 5-羟甲基糠醛（5-HMF）分解的影响。通过拟一级方程计算了阴离子存在下葡萄糖、果糖和 5-HMF 分解的速率常数，并计算了速率常数的影响因素，以证明不同阴离子的催化效果。与不加盐的结果相比，氯离子、溴离子、碘离子和硝酸盐离子并没有显著加速葡萄糖的分解速率或提高 5-HMF 的选择性，但将果糖的分解速率从 19%提高到 44%，并将 5-HMF 的选择性提高了 4-29%。相比不加盐的结果，磷酸盐、氟化物、硫酸盐和所有有机酸根阴离子将葡萄糖和果糖的分解速率提高了 23-2781%，但将 5-HMF 的选择性从 36%降低到 100%。这些发现为理解葡萄糖和果糖在无机和有机盐存在下水热分解的反应性和机制提供了新的认识。
