| KOH作用下甲壳素的热解特性和动力学研究 |
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| 引用本文： | 纪青松,李海朝.KOH作用下甲壳素的热解特性和动力学研究[J].生物质化学工程,2021,55(6):21-25. |
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| 作者姓名： | 纪青松 李海朝 |
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| 作者单位： | 青海民族大学, 青海省应用物理化学重点实验室, 青海 西宁 810007 |
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| 基金项目： | 青海省自然科学基金资助项目(2019-ZJ-928) |
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| 摘 要： | 采用热重分析法研究了经KOH浸渍的甲壳素的热解特性，并考察了不同浸渍比对热解过程的影响；同时采用Coats-Redfern积分法拟合计算出热解动力学参数，探究了KOH对甲壳素主要热解过程中活化能的影响。热重分析结果表明：KOH的加入改变了甲壳素的热解行为，降低了热解所需的活化能，加快了反应速率，促进了甲壳素热解；当浸渍比即m（65% KOH）∶m（甲壳素）=2∶1或3∶1时，KOH浸渍后能使甲壳素在140℃左右开始迅速热解。热解动力学参数计算结果表明：无论反应级数选择多大，其线性拟合效果均比较好，相关系数基本都高于0.95；KOH作用下甲壳素热解是一个复杂的化学反应，而不是单一的某一级反应。
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| 关 键 词： | 甲壳素 KOH 快速热解 动力学参数 |
| 收稿时间： | 2020-09-04 |
Pyrolysis Characteristics and Kinetics of Chitin with KOH |
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| Qingsong JI,Haichao LI.Pyrolysis Characteristics and Kinetics of Chitin with KOH[J].Biomass Chemical Engineering,2021,55(6):21-25. |
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| Authors: | Qingsong JI Haichao LI |
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| Affiliation: | Key Laboratory of Applied Chemistry of Qinghai Province, Qinghai Nationalities University, Xining 810007, China |
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| Abstract: | The thermogravimetric analysis method was used to research the pyrolysis characteristics of chitin with KOH, and the effect of different impregnation ratios on the pyrolysis process was analyzed. The pyrolysis kinetic parameters were obtained by using the Coats-Redfern integral theory. The effect of KOH on the activation energy of the main pyrolysis process of chitin was investigated.The results of thermogravimetric showed that the addition of KOH changed the pyrolysis behavior of chitin, reduced the activation energy of pyrolysis accelerated the reaction rate and promoted the pyrolysis of chitin. Chitin could be fast pyrolysis with KOH at 140℃ and m(65%KOH): m(chitin)=2:1 or 3:1. The calculating results of pyrolysis kinetic parameters indicated that chitin pyrolysis with KOH was a complex reaction. |
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| Keywords: | chitin potassium hydroxide fast pyrolysis kinetic parameters |
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