2种生物质材料的热解特性及动力学研究  

Pyrolytic Characteristics and Kinetics of Two Types of Biomass Materials

作　　者：郑志锋[1] 黄元波[1] 蒋剑春[2] 周玲[1] 杨晓琴[1] 

机构地区：[1]西南林学院木质科学与装饰工程学院,西南山地森林资源保育与利用省部共建教育部重点实验室,云南昆明650224 [2]中国林业科学研究院林产化学工业研究所,生物质化学利用国家工程实验室,国家林业局林产化学工程重点开放性实验室,江苏南京210042

出　　处：《西南林学院学报》2010年第1期63-66,共4页Journal of Southwest Forestry College

基　　金：国家自然科学基金项目(30800867)资助;国家科技支撑计划项目(2006BAD19B06)资助;教育部科学技术研究重点项目(209117)资助;中国博士后科学基金项目(20080430465)资助;云南省社会发展科技计划项目(2007C068M)资助;云南省教育厅科学研究基金重点项目(09Z0065)资助

摘　　要：用热重分析在不同升温速率(5～50℃/min)和一定氮气(20 mL/min)条件下对甘蔗渣、杨木的热解失重过程进行研究。结果表明,加热速率越大,热解速率越快;其热解过程可分为失水干燥、预热解、快速热解和残余物热解4个阶段;甘蔗渣、杨木快速热解阶段的失重率分别为80%和85%,它们均可由一级反应过程描述。由Coats-Redfern方法计算得出,甘蔗渣、杨木快速热解阶段低温热解平均活化能分别为40.84、74.94 kJ/mol,高温热解平均活化能分别为9.21、11.39 kJ/mol。The pyrolytic characteristics of bagasse and poplar timber （Populus spp. ）at different heating rotes （5 - 50 ℃/min） under N2 atmosphere （20mL/min） were studied by using thermogravimetric analysis （TG）. The result showed that the pyrolysis speed of the studied biomasses increased with the increment of the heating rate. The pyrolysis process of bagasse and poplar timber consisted of four stages, i.e. , drying from dehydration, pre-pyroly- sis, fast pyrolysis and slow pyrolysis of the residues. The weight loss of bagasse and poplar timber at the fast pyroly- sis stage was about 80 w % and 85 w % , respectively. The pyrolysis process could be described by first-order global model for both biomass materials. With the method of Coasts-Redfern, the average activation energy of bagasse and poplar timber at low temperature pyrolysis stage was 40.84 k J/mol and 74.94 k J/mol, whereas 9.21 k J/mol and 11.39 kJ/mol individually at high temperature stage. The differences in pyrolysis process between bagasse and poplar timber were due to their different chemical components.

关 键 词：甘蔗渣 杨木 热解 动力学 

分 类 号：S216[农业科学—农业机械化工程]