第31卷第4期煤炭学报Vol.31No.42006年8月JOURNALOFCHINACOALSOCIETYAug.2006文章编号:0253-9993(2006)04-0501-05生物质的热解过程及其动力学规律程世庆,尚琳琳,张海清(山东大学能源与动力工程学院,山东济南250061)摘要:采用热重分析法(TGA)对几种常见天然生物质(稻秆、麦秆、玉米秆)和其衍生物木质素、造纸废液颗粒等的热解过程及其动力学规律进行了研究.实验中加热速率分别为10,20,30℃/min,终温为850℃.热解在氮气气氛下进行,并用高纯氮气作为保护气体.实验结果表明:天然生物质的非等温热解只有1个剧烈失重阶段,而木质素和造纸废液颗粒存在2个剧烈失重阶段.生物质比煤的热解起始温度低,热解速度快.随升温速率的提高,生物质的最大热解速度提高,对应的峰值温度升高,最终失重率呈下降趋势.生物质的热解机理满足三维扩散Jander方程,且随着升温速率的提高,其活化能增大.关键词:生物质;热解过程;动力学;热重分析中图分类号:TK6文献标识码:A收稿日期:2005-11-07基金项目:国家自然科学基金资助项目(5057212)作者简介:程世庆(1965-),男,山东泰安人,博士,副教授.Tel:0531-88392264,E-mail:shqcheng@sdueducnThepyrolysischaracteristicsofbiomassanditsdynamicslawCHENGShiqing,SHANGLinlin,ZHANGHaiqing(CollegeofEnergyandPowerEngineering,ShandongUniversity,Jinan250061,China)Abstract:Thepyrolysischaracteristicsanddynamicsofthenaturalbiomass(includingricestalks,wheatstalks,cornstalksetc.)andtheirramifications(ligninandpapermillsullageparticles)werestudiedusingthethermogravimetricanalysis(TGA)methodunderdifferentheatingrate,whichare10,20,30℃/minrespectively.Theterminaltemperatureoffurnaceis850℃andthehighpureN2isusedasreactingandprotectinggas.Theresultsshowthat:thenaturalbiomasshasonlyonefastagravicperiod,buttheramificationhastwo.Thestartingdecomposetemperatureofbiomassislowerandthevelocityishigherthanthatofthecoal.Withtheriseofheatingrate,themaximumdecomposerateanditscorrespondingtemperaturesofbiomassincreases,butthefinalagravicquotientdecreases.Pyrolysismechanismofbiomassissuitablefor3DdiffuseJanderequation,andtheactivatedenergyincreaseswiththeriseofheatingrate.Keywords:biomass;pyrolysisprocess;dynamics;thermogravimetricanalysis(TGA)生物质燃料是光合作用产生的有机可燃物的总称.生物质能作为一种理想的可再生能源,它来源广泛...