生物质催化热解反应特性及反应机理研究

摘要生物质是仅次于石油、煤炭、天然气的第四大能源，是地球上普遍的一种可再生能源，大力发展生物质能一系列清洁能源，已经成为保护环境，造福人类的首要任务。

生物质稻壳的热解一般可分为三个阶段：稻壳的失水阶段、主要热裂解阶段和缓慢热裂解阶段。本文通过研究不同升温速率及催化剂对稻壳热解的影响，了解稻壳的热解过程及动力学过程，并结合实验内容作出具体分析。通过研究不同升温速率及催化剂对稻壳热解的影响，探究在5℃/min、10℃/min、15℃/min、20℃/min的升温速率下，得出随着升温速率的增大，失重曲线逐渐向高温侧移动，失重速率曲线的峰越陡，峰温也逐渐向高温侧移动。本文利用CuO和Fe2O3的混合物以及CuOFe2O3作为催化剂，结果表明，添加催化剂能加快稻壳原料的热解，降低了焦炭的形成率。最后对实验数据进行动力学分析。83000

毕业论文关键词生物质稻壳热解催化剂动力学分析

外文摘要

Title Study on the process of preparing gaseous fuel by pyrolysis of biomass

Abstract Biomass is a kind of renewable energy source widespread on the earth and its amount is the fourth largest going after oil,coal and natural gas。 It has been a main task to explore such clean energy to protect the environment。 This paper has studied the effects of different heating rates and different kinds of catalysts on the rice husk pyrolysis process。

It has been found that the pyrolysis process of rice husk can be pided into three steps, i。e。 dehydration,main pyrolysis and slow pyrolysis。 With the increase of heating rate, the TG curve tends to move to the higher temperature zone, and the TGA curve becomes steeper。 Then the CuO and Fe2O3 mixture and CuOFe2O3 were studied as catalysts respectively。 The result has shown that additions of both catalysts can improve the pyrolysis of rice husk raw material, and the formation of coke has also been reduced。 Finally,kinetic analysis of the experimental data was conducted to better dunerstand the pyrolysis process of rice husk。 The results proved that existences of catalysts have changed the reaction mechanism function and activation energy of the rice husk pyrolysis process。

Keywords biomass rice husk pyrolysis catalyst kinetic analysis;

1 绪论 1

1。1 生物质与生物质能 1

1。2 生物质的组成特性 1

1。2。1 纤维素 1

1。2。2 半纤维素 2

1。2。3 木质素 2

1。3 生物质转化为能源的方法 3

1。3。1 微生物法 3

1。3。2 直接燃烧法 3

1。3。3 化学转化法 3

1。4 生物质热解 4

1。5 生物质能的研究意义及发展现状 5

1。5。1 世界能源发展趋势及现状 5

1。5。2 我国能源发展趋势及现状 5

1。6 本文研究的主要内容生物质催化热解反应特性及反应机理研究:http://www.youerw.com/huaxue/lunwen_97759.html