摘要
为研究沙柳材在多元醇溶液中液化反应的反应机制,本文应用动力学模型探讨了不同温度下反应时间和沙柳液化率的关系。结果表明,沙柳在多元醇溶液中的反应为多级次的复杂反应,表观反应速率常数随着温度的升高而逐渐升高。活化能Ea=7.15×10~4 J·mol^(-1),指前因子A=4.1371 S^(-1)。根据过渡状态理论,活化自由焓△G、活化焓△H、活化熵△S的值随着温度的升高而改变。整个反应为吸热反应,在有外界能量输入的情况下,液化体系容易发生反应。
In order to study the mechanism of the liquefied reaction of Salix psammophila in alcohols, the dynamic model was applied to show the relationship between the reaction time and the liquefied ratio of Salix psammophila at different temperatures. The results showed that the liquefaction of Salix psammophila in polyhydric alcohols was multilevel and the apparent reaction rate constants went up with the increase of temperatures. Liquefaction activation energy Ea was 7.15×104 J·mol-1 and pre-exponential factor A was 4.1371S-1. According to transition-state theory, the activation free enthalpy(△G),activation enthalpy(△H), and activation entropy(△S) of reaction changed with the increase of temperature. The whole liquefied reaction of Salix psammophila in polyhydric alcohols was endothermic, and the liquefaction system is easily to react when an external energy was input.
作者
周宇
韩望
袁大伟
赵丽青
安珍
ZHOU Yu;HAN Wang;YUAN Da-wei;ZHAO Li-qing;AN Zhen(College of Material Science and Art Design/Inner Mongolia Agricultural University, Hohhot 010018, China;College of Science/Inner Mongolia Agricultural University, Hohhot 010018, China)
出处
《山东农业大学学报（自然科学版）》
CSCD
2017年第1期36-40,共5页
Journal of Shandong Agricultural University：Natural Science Edition
基金
国家自然基金(31360160)
高等学校博士学科点专项科研基金联合资助课题(20121515110006)
关键词
沙柳
动力学
液化反应
Salix psammophila
kinetic
liquefaction
