花生壳热解过程及几种动力学分析方法比较
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摘要
为了充分燃烧利用农业废弃物花生壳,利用TG-DSC热重分析仪,分别以5、10、20、30、50℃·min~(-1)的升温速率,考察了花生壳的热失重行为,并对其热解行为做了进一步研究。结果表明,花生壳的热解分为3个阶段,热失重主要集中在200～400℃,此阶段发生热裂解,生成大量气体,导致样品质量快速减少,是裂解的主要阶段。3种热动力学模型F-W-O法、V&W法和Kissinger法估算出的热解反应的表观活化能,分别为180.01 kJ·mol~(-1)、181.35 kJ·mol~(-1)和176.99 kJ·mol~(-1)。3种模型的估算结果相差不大,可为今后花生壳的热解研究提供理论依据。
In order to ef?ciently utilize peanut shell as agricultural biomass,the thermal degradation behaviors of peanut shell at different heating rates(5,10,20,30,50 ℃/min) had been studied by TG and DTG in an atomosphere of nitrogen.The results showed that the pyrolysis process of peanut shell could be divided into three stages,and the derivaive thermo-gravimetry curve of peanut shell mainly distributed over 200～400℃,this stage was the main stage of pyrolysis,with the release of a large amount of gas and the mass of the sample decreases rapidly.Three methods F-W-O,V&W and Kissinge methods were used to determine the activation energies,the caculated actativation energies under the these methods were 180.01 kJ?mol~(-1),181.35 kJ?mol~(-1) and 176.99 kJ?mol~(-1),respectively.The three results were consistent,so it could provided a theoretical basis for the future study of peanut shell pyrolysis.
In order to ef?ciently utilize peanut shell as agricultural biomass,the thermal degradation behaviors of peanut shell at different heating rates(5,10,20,30,50 ℃/min) had been studied by TG and DTG in an atomosphere of nitrogen.The results showed that the pyrolysis process of peanut shell could be divided into three stages,and the derivaive thermo-gravimetry curve of peanut shell mainly distributed over 200～400℃,this stage was the main stage of pyrolysis,with the release of a large amount of gas and the mass of the sample decreases rapidly.Three methods F-W-O,V&W and Kissinge methods were used to determine the activation energies,the caculated actativation energies under the these methods were 180.01 kJ?mol~(-1),181.35 kJ?mol~(-1) and 176.99 kJ?mol~(-1),respectively.The three results were consistent,so it could provided a theoretical basis for the future study of peanut shell pyrolysis.
引文
[1]李钢,王珏,邓天天.农业废弃物花生壳热解气化利用研究[J].农机化研,2019(7):254-257.
[2]吕丽华,李长伟,吴晨星.废弃花生壳/EVA复合材料的制备及其吸声性能[J].现代纺织技术,2018,26(4):12-16.
[3]李冲,何选明,李翠华,等.花生壳炭用作高炉喷吹燃料的基础特性[J].煤炭转化,2018,41(1):49-53.
[4]Nevers.D.,Thunman.H.,Matos.A.,et al.Characterization and Prediction of Biomass Pyrolysis[J].Progress in Energy and Combustion Science,2011,37(5):611-630.
[5]Huang,H.J.,Yuan,X.Z.Recent Progress in the Direct Liquefaction of Typical Biomass[J].Progress in Energy and Combustion Science,2015,49(5):59-80.
[6]张志剑,李鸿毅,朱军,等.废弃生物质液化技术制取生物油的研究进展[J].环境污染与防治,2014,36(3):87-93.
[7]赵丽霞,陈冠益,陈占秀.生物质玉米芯热解动力学实验研究[J].太阳能学报,2011,32(4):598-603.
[8]肖瑞瑞,杨伟,于广锁.常见农林生物质稻草的催化热解动力学特性[J].化工进展,2013,32(5):1001-1005.
[9]陈永,李玲,洪玉珍,李建保,等.椰壳纤维的热解动力学分析[J].材料导报,2011,25(1):107-111.
[10]郑志锋,黄元波,蒋剑春,等.核桃壳热解特性及同种动力学模型结果比较[J].太阳能学报,2011,32(11):1677-1681.
[11]Flynn J H,Wall L A.General treatment of the thermogravimetry of[J].Journal of Research of the National Bureau of Standards-A.Physics and Chemistry,1966,70(6):487-523.
[12]Takeo Ozawa.A new method of analyzing therogravimetric data[J].Bulletin of the Chemical Society of Japan,1965,38(11):1881-1886.
[13]Vyazovkin E Y.Evaluation of activation energy of thermally stimulated solid-state reactions under arbitrary variation of temperature[J].Journal of Computational Chemistry,1997,18(3):393-402.
[14]Kissinger H E.Variation of peak temperature with heating rate in differential thermal analysis[J].Journal of Research of the National Bureau of Standards,1956,57(4):217-222.[1 5]Raveendran K,Ganesh A,Kartic K C.Pyrolysis characteristics of biomass and biomass components[J]Fuel,1996,75(8):987-998.
[16]Williams P T,Bwsler S.The influence of temperature and heating rate on the slow pyrolysis of biomass[J].Renewable Energy,1996,7(3):233-250.
[2]吕丽华,李长伟,吴晨星.废弃花生壳/EVA复合材料的制备及其吸声性能[J].现代纺织技术,2018,26(4):12-16.
[3]李冲,何选明,李翠华,等.花生壳炭用作高炉喷吹燃料的基础特性[J].煤炭转化,2018,41(1):49-53.
[4]Nevers.D.,Thunman.H.,Matos.A.,et al.Characterization and Prediction of Biomass Pyrolysis[J].Progress in Energy and Combustion Science,2011,37(5):611-630.
[5]Huang,H.J.,Yuan,X.Z.Recent Progress in the Direct Liquefaction of Typical Biomass[J].Progress in Energy and Combustion Science,2015,49(5):59-80.
[6]张志剑,李鸿毅,朱军,等.废弃生物质液化技术制取生物油的研究进展[J].环境污染与防治,2014,36(3):87-93.
[7]赵丽霞,陈冠益,陈占秀.生物质玉米芯热解动力学实验研究[J].太阳能学报,2011,32(4):598-603.
[8]肖瑞瑞,杨伟,于广锁.常见农林生物质稻草的催化热解动力学特性[J].化工进展,2013,32(5):1001-1005.
[9]陈永,李玲,洪玉珍,李建保,等.椰壳纤维的热解动力学分析[J].材料导报,2011,25(1):107-111.
[10]郑志锋,黄元波,蒋剑春,等.核桃壳热解特性及同种动力学模型结果比较[J].太阳能学报,2011,32(11):1677-1681.
[11]Flynn J H,Wall L A.General treatment of the thermogravimetry of[J].Journal of Research of the National Bureau of Standards-A.Physics and Chemistry,1966,70(6):487-523.
[12]Takeo Ozawa.A new method of analyzing therogravimetric data[J].Bulletin of the Chemical Society of Japan,1965,38(11):1881-1886.
[13]Vyazovkin E Y.Evaluation of activation energy of thermally stimulated solid-state reactions under arbitrary variation of temperature[J].Journal of Computational Chemistry,1997,18(3):393-402.
[14]Kissinger H E.Variation of peak temperature with heating rate in differential thermal analysis[J].Journal of Research of the National Bureau of Standards,1956,57(4):217-222.[1 5]Raveendran K,Ganesh A,Kartic K C.Pyrolysis characteristics of biomass and biomass components[J]Fuel,1996,75(8):987-998.
[16]Williams P T,Bwsler S.The influence of temperature and heating rate on the slow pyrolysis of biomass[J].Renewable Energy,1996,7(3):233-250.