常见农林生物质稻草的催化热解动力学特性  

Characteristics of catalytic pyrolysis kinetics of straw

作　　者：肖瑞瑞[1] 杨伟[1] 于广锁[2] 

机构地区：[1]枣庄学院化学化工与材料科学学院,山东枣庄277160 [2]华东理工大学煤气化及能源化工教育部重点实验室,上海200237

出　　处：《化工进展》2013年第5期1001-1005,共5页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(20876048);华东理工大学煤气化及能源化工教育部重点实验室开放基金项目

摘　　要：采用热重法对稻草的催化热解特性及反应动力学进行了研究。同时采用Coats-Redfern法对稻草的催化热解过程进行了拟合计算,得到稻草热解的活化能和指前因子。结果表明,酸洗脱灰后稻草热解的初始温度和结束温度都有所升高,稻草的热解反应活性明显降低,热解曲线向高温区移动;而金属盐的加入使稻草的热解曲线向低温区移动,反应活性增加。酸洗后稻草热解活化能升高,加入不同浓度的钾离子、钙离子和镁离子后求得的活化能明显降低,而且加入金属离子的浓度越高,稻草热解的活化能越低。The properties and reaction kinetics of straw catalytic pyrolysis were investigated using thermogravimetric method.Matching computation was carried out to analyze catalytic pyrolysis of straw with the Coats-Redfern method,through which the apparent activation energy and pre-exponential factors of straw pyrolysis with different catalysts were obtained.The initial temperature and final temperature of straw pyrolysis rose after acid-washing.The pyrolysis curve moved to the higher temperature region because of decreasing straw pyrolysis reaction activity.But when metal salts were added to straw,the pyrolysis curve moved to the lower temperature region because of increasing straw pyrolysis reaction activity.The results indicated that the pyrolysis reaction was enhanced by metal salts.The apparent activation energy of acid-washed straw pyrolysis increased.But the apparent activation energy of straw pyrolysis with potassium,calcium and magnesium ions decreased obviously.The larger the ratio of metal ions,the lower the apparent activation energy of straw pyrolysis.

关 键 词：稻草 催化热解 动力学 Coats-Redfern法 

分 类 号：TK6[动力工程及工程热物理—生物能]