基于修正H因子的竹子热水预提取碳水化合物的溶出模型  

Degradation Models of Carbohydrates during Bamboo Hot-water Pre-extraction Based on Modified H-factor

作　　者：胡会超[1] 詹怀宇[1] 柴欣生[1,2] 付时雨[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]佐治亚理工大学造纸科学与技术研究院,美国亚特兰大ga30332

出　　处：《中国造纸》2009年第11期28-32,共5页China Pulp & Paper

基　　金：国家973计划(2007CB210201)资助项目

摘　　要：研究了不同反应条件下热水预提取过程中竹子中的戊糖、己糖的溶出规律。采用差值法分别对戊糖和己糖的溶出反应活化能进行修正发现,活化能取值分别为116.4kJ/mol和97.3kJ/mol时,戊糖和己糖的溶出随修正后的H因子变化规律均优于用常规H因子的描述(其中,对己糖溶出规律的描述的改善犹为明显)。据此,建立了竹子热水预提取过程中戊糖和己糖溶出率的预测模型,即:Cp0.6=0.0049×Hp和Ch=0.0019×Hh,这为控制竹子热水预提取过程中碳水化合物的溶出提供了技术支持。This paper reports on the dissolving behaviors of pentoses and hexoses during bamboo hot-water pre-extraction. The results showed that the modified H-factors calculated with the revised activation energies, i. e. , 116.4 kJ/mol and 97.3 kJ/mol, for pentoses and hexoses, respectively, provide a good description on the carbohydrates＇ dissolving behaviors during the hot-water extraction at the given process conditions. Based on the modified H-factors, the prediction models for pentoses and hexoses extraction from bamboo, i. e. , Cp^0.6 = 0. 0049 × Hp and Ch = 0. 0019×Hh, were established, which will play an important role in controlling dissolving rate of carbohydrates in bamboo hot-water extraction.

关 键 词：竹子热水预提取 活化能 H因子 戊糖 己糖 

分 类 号：TS713[轻工技术与工程—制浆造纸工程]