热重法生物质稻壳热解过程优化

摘要生物质热解技术因其原料丰富广泛，具有可再生性，因而具有良好的发展前景。但目前生物质热解效率低下。为了改善生物质热解过程，本文选取稻壳作为研究对象，采用热重法进行稻壳不同条件下的热解实验，结果发现，提高升温速率可以缩短稻壳的热解时间，提高失重速率；降低升温速率则使稻壳热解更充分，损失重量更多；另外，添加催化剂能够有效地促进稻壳的分解，并降低稻壳的热解初始温度；添加铜锰混合催化剂的催化效果略优于分别添加的 Mn2O3、CuO 催化剂。同时，为了深入研究稻壳热解机理，本文还利用了双外推法计算稻壳理论上的活化能、指前因子等动力学参数，并建立稻壳热解模型，通过与实验结果进行比较，发现二者之间虽然较符合，但仍存在一定偏差。80220

毕业论文关键词生物质热解热重法双外推法优化催化热解

毕业设计说明书外文摘要

Title The optimization of the biomass pyrolysis process

Abstract There is a good prospect for biomass pyrolysis technology because it is renewable and has abundant raw materials。 However,in current,the efficiency of biomass pyrolysis is low。This paper is deal with the different conditions of the biomass pyrolysis experiments,the aim is to improve the the efficiency of the biomass pyrolysis。 First, the rice husk is choosen as the object of the study,via the theory of the thermo gravimetry,it is find that if increasing the heating rate,the time of pyrolysis is reduce,the rate of weight loss is increase。The finding also shows that the addition of the catalyst can effectively promote the pyrolysis process。What’s more, compared the catalytic effect,the mixed Mn2O3+CuO catalyst is proved a little better than the Mn2O3, CuO catalyst。Furthemore,the theory of double extrapolation is used to calculate the husk’s theoretical activation energy, pre-exponential factor and other kinetic parameters, finally establish the model, by comparison with the experimental results，though it is similar, but there are still a certain deviation between the two。

Keywords biomass pyrolysis technology thermo gravimetry optimization double extrapolation catalytic pyrolysis

本科毕业设计说明书第 I 页

1 绪论 1

1。1 研究背景及意义 1

1。2 稻壳热解技术 2

1。3 催化热解技术及研究现状 6

1。4 本课题研究的目的、主要内容 7

2 实验与方法 9

2。1 实验原料制备 9

2。2 稻壳的工业分析 10

2。3 稻壳热分析实验 14

2。4 热解反应机理研究 17

3 热分析结果与讨论 21

3。1 不同升温速率下稻壳热解特性分析 21

3。2 添加催化剂时稻壳热解特性分析 26

3。3 本章小结 33

4 稻壳热解的动力学分析 34

4。1 升温速率外推法热重法生物质稻壳热解过程优化:http://www.youerw.com/wuli/lunwen_93102.html