基于等转化率法的牛粪热解动力学特性研究  

RESEARCH ON KINETIC CHARACTERISTICS OF CATTLE MANURE PYROLYSIS USING ISOCONVERSIONAL METHODS

作　　者：曹红亮[1] 李国强[1] 黄思涵[1] 李屹[1] 刘园园[1] 辛娅[1] 袁巧霞[1] 

机构地区：[1]华中农业大学工学院,武汉430070

出　　处：《太阳能学报》2015年第7期1773-1778,共6页Acta Energiae Solaris Sinica

基　　金：公益性行业(农业)科研专项经费(201303091);华中农业大学大学生科技创新基金(SRF)(2014030)

摘　　要：基于牛粪的热重实验数据,采用Friedman法和Flynn-Wall-Ozawa法两种等转化率法,对牛粪的热解过程、不同热解阶段的动力学参数反应活化能的分布及变化规律进行研究。结果表明:牛粪的热解过程是一个极其复杂的多步反应过程,其中可溶性提取物、半纤维素、纤维素和木质素4大组分呈现各自的热分解主导区;随着热解温度的逐渐升高,牛粪内各组分从较短链的低聚合物到长链高聚合物逐渐异化、分解,转化为小分子的挥发分和固定碳,相应活化能E逐渐增大。the thermogravimetric （TG） experiments of cattle manures are completed with three different heating rates of 10, 20, and 30 ℃/min. On the basis of the TG data, the pyrolysis characteristics and kinetic analysis for the cattle manure pyrolysis are conducted in detail using isoconversionalmethods, e.g., Friedman and Flynn-Wall-Ozawa （FWO） methods. Results indicated that the pyrolysis process of cattle manures is a complicated multi-step reaction process, showing different activation energy distributions and reaction mechanisms under different temperature ranges. The different constituents of cattle manures, including neutral detergent soluble e.g., proteins, starches, lipids and sugars, etc., hemicellulose, cellulose, and lignin, have different dominating ranges of decomposition. With the temperature increasing, the decomposition of cattle manures starts from the constituents with simple structure to the constituents with complex structure. During the decomposition process, theapparent activation energy is increasing and the energy for the reaction becomes larger and larger.

关 键 词：牛粪 热解 动力学 热重 等转化率 活化能 

分 类 号：S216[农业科学—农业机械化工程]