典型禾本植物与梧桐植物共热解实验及动力学研究
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摘要
为了探究生物质混合热解过程中存在的协同效应,采用热重分析仪对芦苇、玉米秆、梧桐叶及其两两混合生物质的热解规律进行了研究。结果表明:生物质混合热解与生物质单独热解的失重趋势基本相同,可以分为干燥、预热、质量快速减少和碳化四个阶段;玉米秆与芦苇混合物、梧桐叶与芦苇混合物的热解起始温度低于单独热解时的平均值,失重率高于单独热解时的平均值,热解特征因素高于其单独热解的平均值,活化能小于其单独热解的平均值;采用二级化学反应动力学模型可以很好地拟合生物质热解过程。
In order to explore the synergistic effect in the mixed pyrolysis process of biomass,the pyrolysis law of reed,corn stalk,paulownia leaves and their mixed biomass was studied by thermogravimetric analyzer. The results show that the weight loss trend of biomass mixed pyrolysis and biomass alone is basically the same,which can be divided into four stages: drying,preheating,rapid reduction and carbonization. The pyrolysis initial temperature of the mixture of corn stalk and reed,Chinese para-sol leaf and reed is lower than that of the single thermal solution,and the weight loss rate is higher than that of the individual. The pyrolysis characteristic factor is higher than the average of the pyrolysis,and the activation energy is less than the average of the pyrolysis. The two stage chemical reaction kinetic model can be used to fit the biomass pyrolysis process well.
In order to explore the synergistic effect in the mixed pyrolysis process of biomass,the pyrolysis law of reed,corn stalk,paulownia leaves and their mixed biomass was studied by thermogravimetric analyzer. The results show that the weight loss trend of biomass mixed pyrolysis and biomass alone is basically the same,which can be divided into four stages: drying,preheating,rapid reduction and carbonization. The pyrolysis initial temperature of the mixture of corn stalk and reed,Chinese para-sol leaf and reed is lower than that of the single thermal solution,and the weight loss rate is higher than that of the individual. The pyrolysis characteristic factor is higher than the average of the pyrolysis,and the activation energy is less than the average of the pyrolysis. The two stage chemical reaction kinetic model can be used to fit the biomass pyrolysis process well.
引文
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11 徐建国,魏兆龙.用热分析法研究煤的热解特性[J].燃烧科学与技术,1999,5(2):175-179Xu Jianguo,Wei Zhaolong. Study on pyrolysis characteristics of coal by thermal analysis[J]. Combustion Science and Technology,1999,5(2):175-179
12 刘杨.糖醛渣与稻壳共热解的研究[D].吉林:东北电力大学,2005Liu Yang. Study on copyrolysis of furfural residue and rice husk[D]. Jilin:Northeast Electric Power University,2005
2 Forsberg K M,Rasmuson A C. Recycling of waste pickle acid by precipitation of metal fluoride hydrates[J]. Minerals Engineering,2007,20(9):950-955
3 樊永胜,蔡忆昔,李小华,等. 4种农林生物质的热解特性及动力学研究[J].中国科技论文,2013,8(12):1253-1257Fan Yongsheng,Cai Yixi,Li Xiaohua,et al. Pyrolysis characteristics and kinetics of four agricultural and forest biomass[J]. Chinese Scientific Papers,2013,8(12):1253-1257
4 唐剑昭,裴毓雯,胡勤海,等.盐酸酸洗废液制备纳米氧化铁[J].环境工程学报,2017(1):371-378Tang Jianzhao,Pei Yuwen,Hu Qinhai,et al. Preparation of nanometer iron oxide by hydrochloric acid pickling waste liquid[J]. Journal of Environmental Engineering,2017(1):371-378
5 Fang Z,Qiu X,Chen J,et al. Degradation of metronidazole by nanoscale zero-valent metal prepared from steel pickling waste liquor[J]. Applied Catalysis B Environmental,2010,100(1-2):221-228
6 Agrawal A,Sahu K K. An overview of the recovery of acid from spent acidic solutions from steel and electroplating industries[J]. Journal of Hazardous Materials,2009,171(1-3):61-75
7 任秀彬,文辉,安宁,等.煤与生物质固定床共热解产物分布及热解动力学研究[J].应用化工,2017,46(8):1644-1649Ren Xiubin,Wen Hui,An Ning,et al. Study on the distribution and pyrolysis kinetics of co-pyrolsis products in coal and biomass fixed bed[J]. Applied Chemical,2017,46(8):1644-1649
8 刘巧霞,张月明,黄勇,等.煤与生物质快速流化床共热解的协同效应[J].煤炭转化,2017,40(1):19-25Liu Qiaoxia,Zhang Yueming,Huang Yong,et al. Synergistic effect of co-pyrolysis of coal and biomass fast fludized bed[J]. Coal Conversion,2017,40(1):19-25
9 李帅丹,陈雪莉,于广锁,等.生物质与煤共热解行为及模型化研究[J].太阳能学报,2014,35(6):965-970Li Shuaidan,Chen Xueli,Yu Guangsuo,et al. Copyrolysis behavior and modeling of biomass and coal[J]. Journal of Solar Energy,2014,35(6):965-970
10 Bridgwate A V. Produtiong of high grade fuels and chemical from catalytic pyrolysis of biomass[J]. Ctalysis Today,1996,29(1-4):285-295
11 徐建国,魏兆龙.用热分析法研究煤的热解特性[J].燃烧科学与技术,1999,5(2):175-179Xu Jianguo,Wei Zhaolong. Study on pyrolysis characteristics of coal by thermal analysis[J]. Combustion Science and Technology,1999,5(2):175-179
12 刘杨.糖醛渣与稻壳共热解的研究[D].吉林:东北电力大学,2005Liu Yang. Study on copyrolysis of furfural residue and rice husk[D]. Jilin:Northeast Electric Power University,2005
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