桉树类生物质热解及产物释放特性研究  

Study on pyrolysis of eucalyptus biomass and releasing characteristics of products

作　　者：李莉 宋景慧[2] 马晓茜[3] 湛志钢[2] 

机构地区：[1]广州宇阳电力科技有限公司,广东广州510600 [2]广东电网公司电力科学研究院,广东广州510080 [3]华南理工大学电力学院,广东广州510640

出　　处：《可再生能源》2013年第1期50-56,共7页Renewable Energy Resources

基　　金：广东电网公司重点科研项目(K-GD2011-389)

摘　　要：采用热重红外联用方法研究不同升温速率下桉树枝和桉树皮的热解特性和热解气体产物的释放特性，对比分析两者的差异性及差异机理。结果表明：桉树枝热解过程主要分为干燥、热解和碳化3个阶段，热解速率较快，气体产物释放主要集中在热解阶段进行，主要气体产物有烷烃、醇、酚、醛、羧酸、酮等多种有机气体产物和少量CO，CO2；桉树皮热解过程分为干燥、进一步十燥、热解反应、碳化及高温持续碳化5个阶段，相比桉树枝热解速率明显较低。桉树皮热解反应阶段在450～550℃和650-800℃两个高温区间存在较为剧烈的碳化反应过程，主要气体产物为CO2和C0。The pyrolysis processing of eucalyptus biomass including branch and bark in different heating rates and their releasing characteristics of products were carried out by thermogravimetric analysis （TGA） coupled with fourier transform infrared spectrometry （FTIR） system, the difference of pyrolysis mechanism between two eucalyptus biomass was further analyzed. The results indicate that there are mainly three stages during the processing of eucalypt branch pyrolysis which are drying process, pyrolysis process and carbonating process. During the process of pyrolysis, many kinds of gaseous organic compounds are released, with faster rate of pyrolysis reaction compare to eucalypt brak. The pruducts mainly are many organic gas and little CO2 and CO. The processing of eucalypt brak pyrolysis is more complicated, which main has five stages including drying, deeply drying, pyrolysis, carbonating and deeply carbonating processing in higher temperature, with lower pyrolysis rate. It has similar gaseous products during the processing of pyrolysis compared with eu- calypt branch. However, there exited vigorously carbonating reaction during the temperature range of 450-550 ℃ and 650-800℃, with CO2 and CO as the main gaseous products.

关 键 词：桉树 热解 产物释放特性 热重红外 

分 类 号：TK6[动力工程及工程热物理—生物能] S216.2[农业科学—农业机械化工程]