生物质热解过程吸热量  

HEAT REQUIREMENT OF BIOMASS PYROLYSIS

作　　者：何芳[1] 徐梁 柏雪源[1] 蔡均猛[3] 易维明[1] 

机构地区：[1]山东理工大学,淄博255049 [2]德国耐弛仪器制造公司上海应用实验室,上海200070 [3]上海理工大学,上海200093

出　　处：《太阳能学报》2006年第3期237-241,共5页Acta Energiae Solaris Sinica

基　　金：国家863高技术研究发展计划(2001AA514030);山东省自然科学基金(2004ZX21)

摘　　要：对生物质热解过程吸热量(生物质升温所吸热量和生物质热解所吸热量的和)的研究现状进行了总结分析,认为目前采用的分别选取生物质热容cp和热解反应热Qp用公式来计算热解过程吸热量的方法很难得出准确的结果。通过对同步热分析仪(STA)的分析和对差热曲线(DSC)的研究,将cp和Qp综合考虑,对实验所得DSC曲线进行处理和积分得出热解过程吸热量的规律。在Netsch STA 449C上对小麦秸秆、棉杆、花生壳和白松进行了实验研究和分析。结果表明:将1kg上述干生物质从初始室温303K升到主要热解反应完成的温度673K,所需提供的热量分别为523kJ4、59kJ、385kJ、646kJ,为生物质热解工艺的能量平衡分析和经济性分析提供了参考。Heat required by pyrolysis of biomass, including the heat necessary to heat the sample and the heat of the reaction, was analyzed. It was pointed out that calculation result from equation Q = cp△T ＋ Qp was not able to achieve precision data of heat required because heat capacity of the reactant （ cp ） and reaction heat （ Qp ） of the process are difficult to be measured separately. Differential scanning calorimetry （DSC） curve obtained from simultaneous thermal analyzer （STA） was investigated. A new method combining cp and Qp, to achieve data of heat required by integrating the DSC curves directly was proposed. Experiments were conducted for wheat straw, cotton stalk, pine, and peanut shell on Netsch STA 449C analyzer and the DSC curves were analyzed. The results showed that heat required of pyrolysis of the aforementioned four types of biomass from ambient temperature 303K to 673K are 523kJ,459kJ,646kJ,385kJ respectively. These data are useful for the heat balance analysis and potential analysis of the process.

关 键 词：生物质 热解 吸热量 分析 实验 

分 类 号：TK6[动力工程及工程热物理—生物能]