香蕉皮中果胶提取的动力学研究  

Kinetics of pectin extraction from banana peel

作　　者：顾焰波[1] 张勤[1] 江冰[1] GU Yan-bo;ZHANG Qin;JIANG Bing(Taizhou Institute of Science and Technology,NJUST,Taizhou 225300,China)

机构地区：[1]南京理工大学泰州科技学院,江苏泰州225300

出　　处：《应用化工》2020年第10期2500-2503,2507,共5页Applied Chemical Industry

基　　金：江苏省高等学校自然科学研究面上项目(18KJB530010)。

摘　　要：分别采用离子交换树脂法和酸提法提取香蕉皮果胶。利用Fick第二定律构建动力学模型,获得速率常数和表观活化能E a,且进行了有效性分析和模型预测能力验证。结果表明,构建的动力学模型均能较好的预测离子交换法和酸提法提取香蕉皮中果胶的动力学过程,离子交换法提取果胶的最优条件:树脂用量7%,料液比1∶20 g/mL,浸提液pH值为2,浸提温度85℃,浸提时间为T max=118.9 min,果胶得率达19.29%;酸提法在相同料液比、浸提液pH值条件下,浸提温度85℃,浸提时间为T max=120.1 min,果胶得率为10.58%。离子交换法提取香蕉皮中果胶的活化能与传统的酸提法相比,E a从37.88 kJ/mol降至23.68 kJ/mol,离子交换法提取香蕉皮中果胶明显优于酸提法。The extraction of pectin from banana peel was studied by ion exchange resin and acid extraction.Fick’s second law was used to construct the kinetic model,and the rate constant and apparent activation energy were obtained.The validity analysis and model prediction ability were verified.The results showed that the kinetic model could predict the extraction process of pectin from banana peel by ion exchange and acid extraction.The optimum conditions for pectin extraction by ion exchange method were obtained:resin dosage 7%,material-liquid ratio 1∶20 g/mL,pH value 2,extraction temperature 85℃,extraction time T max=118.9 min,pectin yield 19.29%;acid extraction method under the same material-liquid ratio and pH value of extraction solution,extraction temperature 85℃.The yield of pectin was 10.58%for T max=120.1 min.Compared with the traditional acid extraction method,the activation energy of pectin extracted by ion exchange method decreased from 37.88 kJ/mol to 23.68 kJ/mol.The extraction of pectin from banana peel by ion exchange method was obviously better than that by acid extraction method.

关 键 词：香蕉皮 果胶 提取 离子交换法 动力学模型 

分 类 号：TQ01[化学工程]