串行流化床生物质气化动力学模拟
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摘要
生物质是一种清洁、可再生能源,来源广泛。串行流化床气化工艺将生物质气化和燃烧过程分离,具有气化温度较低和合成气浓度高等优点,是国内外学者进行生物质能源利用研究的热点之一。为模拟其气化过程,针对松木和玉米秸秆这2种生物质原料,以水蒸气为气化介质,结合气化反应动力学方程,利用Aspen Plus系统(V7.2)对串行流化床生物质气化过程进行了动力学模拟,考察了进料水蒸气与生物质质量比(S/B)和气化温度对气化干气组成和产率的影响。模拟结果表明:①S/B值的变化、气化湿度的变化对松木和玉米秸秆气化所得干气组成及产率的影响趋势是一致的,但随着S/B增加,松木和玉米秸秆气化所得干气产率增加,CO_2和H_2含量升高,CO含量降低;②随着气化温度的升高,干气中H_2和CO_2含量逐渐降低,CO含量和干气产率增加;③在相同研究条件下,松木气化所得干气中的H_2含量与玉米秸秆气化相当,但产率优于玉米秸秆气化的产率。
Biomass is a kind of clean and renewable energy with a huge distribution across the land.An interconnected fluidized bed gasification process separates the biomass gasification from combustion,with low gasification temperature and highly concentrated syngas,which has received great.In this paper,pines and corn stalks were selected as biomass feedstock and steam was employed as a gasification medium.The kinetic model for the biomass gasification in an interconnected fluidized bed was generated and developed in Aspen Plus V7.2.Sensitivity analysis was conducted to examine the effect of steam biomass ratio(based on mass) S/B and gasification temperature on the dry gas molar composition and yield.The results show that the change in S/B value and gasification temperature had similar influences on the variation trend of dry gas composition and yield of pines and corn stalks.The dry gas yield,H_2and CO_2 molar concentrations increase and the CO concentration decreases with the increase of S/B value.Along with the increase of gasification temperature,the content of H_2 and CO_2 progressively lowers,while the content of CO and dry gas yield increase.Under the same research conditions,the content of H_2 in dry gas from pine gasification is similar to that from corn stalk gasification,while the dry gas yield of the former is better than that of the latter.
Biomass is a kind of clean and renewable energy with a huge distribution across the land.An interconnected fluidized bed gasification process separates the biomass gasification from combustion,with low gasification temperature and highly concentrated syngas,which has received great.In this paper,pines and corn stalks were selected as biomass feedstock and steam was employed as a gasification medium.The kinetic model for the biomass gasification in an interconnected fluidized bed was generated and developed in Aspen Plus V7.2.Sensitivity analysis was conducted to examine the effect of steam biomass ratio(based on mass) S/B and gasification temperature on the dry gas molar composition and yield.The results show that the change in S/B value and gasification temperature had similar influences on the variation trend of dry gas composition and yield of pines and corn stalks.The dry gas yield,H_2and CO_2 molar concentrations increase and the CO concentration decreases with the increase of S/B value.Along with the increase of gasification temperature,the content of H_2 and CO_2 progressively lowers,while the content of CO and dry gas yield increase.Under the same research conditions,the content of H_2 in dry gas from pine gasification is similar to that from corn stalk gasification,while the dry gas yield of the former is better than that of the latter.
引文
[1]程序,崔宗均,朱万斌.呼之欲出的中国生物天然气战略性新兴产业[J].天然气工业,2013,33(9):141-148.Cheng Xu,Cui Zongjun,Zhu Wanbin.The upcoming bionatural gas in China:A strategic emerging industry[J].Natural Gas Industry,2013,33(9):141-148.
[2]武宏香,赵增立,王小波.生物质气化制备合成天然气技术的研究进展[J].化工进展,2013,32(1):83-90.Wu Hongxiang,Zhao Zengli,Wang Xiaobo.Technical development on synthetic natural gas production from biomass(Bio-SNG)[J].Chemical Industry and Engineering Progress.2013,32(1):83-90.
[3]冯飞,宋国辉,沈来宏.生物质气化制取合成气的模拟[J].现代化工,2012,32(12):100-103.Feng Fei,Song Guohui,Shen Laihong.Simulation of biosyngas production from biomass gasification[J].Modern Chemical Industry,2012,32(12):100-103.
[4]周金豪,陈雪莉,郭强,王玉枝.基于ASPEN PLUS模拟生物质与煤气流床共气化工艺[J].太阳能学报,2010,31(9):1112-1116.Zhou Jinhao,Chen Xueli,Guo Qiang,Wang Yuzhi.Process simulation of biomass and coal entrained-flow cogasification based on Aspen Plus[J].Acta Energiae Solaris Sinica,2010,31(9):1112-1116.
[5]Zhang Yanan,Xiao Jun,Shen Laihong.Simulation of methanol production from biomass gasification in interconnected fluidized beds[J].Industrial&Engineering Chemistry Research,2009,48(11):5351-5359.
[6]张媛,张海亮,蒋雪冬.烟煤与生物质秸秆共气化反应动力学研究[J].西安交通大学学报,2011,45(8):123-128.Zhang Yuan,Zhang Hailiang,Jiang Xuedong.Reactivity and kinetics of bitumite and wheat straw blends during cogasification[J].Journal of Xi'an Jiao Tong University,2011,45(8):123-128.
[7]许桂英,孙国刚.生物质与石油焦共气化特性的研究[J].燃料化学学报,2011,39(6):438-442.Xu Guiying,Sun Guogang.Study on characteristics of cogasification of biomass and petroleum coke[J]Journal of Fuel Chemistry Technology,2011,39(6):438-442.
[8]Zhang Juwei,Wu Rongcheng,Zhang Guangyi,et al.Recent studies on chemical engineering fundamentals for fuel pyrolysis and gasification in dual fluidized bed[J].Industrial&Engineering Chemistry Research,2013,52(19):6283-6302.
[9]张小桃,黄明华,王爱军,张燕,Arellano-Garcia H,Wozny G.生物质气化特性研究及分析LJ].农业工程学报,2011,27(2):282-286.Zhang Xiaotao,Huang Minghua,Wang Aijun,Zhang Yan,Arellano-Garcia H,Wozny G.Characteristics of biomass gasification and exergy analysis[J].Transactions of the Chinese Society of Agricultural Engineering,2011,27(2):282-286.
[10]Dufour A,Celzard A,Fierro V,Martin E,Broust F,Zoulalian A.Catalytic decomposition of methane over a wood char concurrently activated by a pyrolysis gas[J].Applied Catalysis A:General,2008,346(1/2):164-173.
[11]Barrio M G,Bel B,Risnes H,Henriksen U,Hustad JE,Srensen LH.Steam gasification of wood char and the effect of hydrogen inhibition on the chemical kinetics[J].Progress in Thermo-Chemical Biomass Conversion,2001,32:150-162.
[12]Abdelouahed L,Authier O,Mauviel G,Corriou JP,Verdier G,Dufour A.Detailed modeling of biomass gasification in dual fluidized bed reactors under Aspen Plus[J].Energy&?Fuels,2012,26(6):3840-3855.
[13]Morf P,Hasler P,Nussbaumer T.Mechanisms and kinetics of homogeneous secondary reactions of tar from continuous pyrolysis of wood chips[J].Fuel,2002,81(7):843-853.
[14]Wen CY,Chaung TZ.Entrainment coal gasification modeling[J].Industrial&Engineering Chemistry Process Design and Development,1979,18(4):684-695.
[15]Bustamante F,Enick RM,Cugini AV,Killmeyer RP,Howard BH,Rothenberger KS.High-temperature kinetics of the homogeneous reverse water-gas shift reaction[J].AIChE Journal,2004,50(5):1028-1041.
[16]吴家桦,沈来宏,肖军,王雷,郝建刚.串行流化床生物质气化制取合成气试验研究[J].中国电机工程学报,2009,29(11):111-118.Wu Jiahua,Shen Laihong,Xiao Jun,Wang Lei,Hao Jiangang.Experimental study on syngas production from biomass gasification in interconnected fluidized beds[J].Proceedings of the CSEE,2009,29(11):111-118.
[2]武宏香,赵增立,王小波.生物质气化制备合成天然气技术的研究进展[J].化工进展,2013,32(1):83-90.Wu Hongxiang,Zhao Zengli,Wang Xiaobo.Technical development on synthetic natural gas production from biomass(Bio-SNG)[J].Chemical Industry and Engineering Progress.2013,32(1):83-90.
[3]冯飞,宋国辉,沈来宏.生物质气化制取合成气的模拟[J].现代化工,2012,32(12):100-103.Feng Fei,Song Guohui,Shen Laihong.Simulation of biosyngas production from biomass gasification[J].Modern Chemical Industry,2012,32(12):100-103.
[4]周金豪,陈雪莉,郭强,王玉枝.基于ASPEN PLUS模拟生物质与煤气流床共气化工艺[J].太阳能学报,2010,31(9):1112-1116.Zhou Jinhao,Chen Xueli,Guo Qiang,Wang Yuzhi.Process simulation of biomass and coal entrained-flow cogasification based on Aspen Plus[J].Acta Energiae Solaris Sinica,2010,31(9):1112-1116.
[5]Zhang Yanan,Xiao Jun,Shen Laihong.Simulation of methanol production from biomass gasification in interconnected fluidized beds[J].Industrial&Engineering Chemistry Research,2009,48(11):5351-5359.
[6]张媛,张海亮,蒋雪冬.烟煤与生物质秸秆共气化反应动力学研究[J].西安交通大学学报,2011,45(8):123-128.Zhang Yuan,Zhang Hailiang,Jiang Xuedong.Reactivity and kinetics of bitumite and wheat straw blends during cogasification[J].Journal of Xi'an Jiao Tong University,2011,45(8):123-128.
[7]许桂英,孙国刚.生物质与石油焦共气化特性的研究[J].燃料化学学报,2011,39(6):438-442.Xu Guiying,Sun Guogang.Study on characteristics of cogasification of biomass and petroleum coke[J]Journal of Fuel Chemistry Technology,2011,39(6):438-442.
[8]Zhang Juwei,Wu Rongcheng,Zhang Guangyi,et al.Recent studies on chemical engineering fundamentals for fuel pyrolysis and gasification in dual fluidized bed[J].Industrial&Engineering Chemistry Research,2013,52(19):6283-6302.
[9]张小桃,黄明华,王爱军,张燕,Arellano-Garcia H,Wozny G.生物质气化特性研究及分析LJ].农业工程学报,2011,27(2):282-286.Zhang Xiaotao,Huang Minghua,Wang Aijun,Zhang Yan,Arellano-Garcia H,Wozny G.Characteristics of biomass gasification and exergy analysis[J].Transactions of the Chinese Society of Agricultural Engineering,2011,27(2):282-286.
[10]Dufour A,Celzard A,Fierro V,Martin E,Broust F,Zoulalian A.Catalytic decomposition of methane over a wood char concurrently activated by a pyrolysis gas[J].Applied Catalysis A:General,2008,346(1/2):164-173.
[11]Barrio M G,Bel B,Risnes H,Henriksen U,Hustad JE,Srensen LH.Steam gasification of wood char and the effect of hydrogen inhibition on the chemical kinetics[J].Progress in Thermo-Chemical Biomass Conversion,2001,32:150-162.
[12]Abdelouahed L,Authier O,Mauviel G,Corriou JP,Verdier G,Dufour A.Detailed modeling of biomass gasification in dual fluidized bed reactors under Aspen Plus[J].Energy&?Fuels,2012,26(6):3840-3855.
[13]Morf P,Hasler P,Nussbaumer T.Mechanisms and kinetics of homogeneous secondary reactions of tar from continuous pyrolysis of wood chips[J].Fuel,2002,81(7):843-853.
[14]Wen CY,Chaung TZ.Entrainment coal gasification modeling[J].Industrial&Engineering Chemistry Process Design and Development,1979,18(4):684-695.
[15]Bustamante F,Enick RM,Cugini AV,Killmeyer RP,Howard BH,Rothenberger KS.High-temperature kinetics of the homogeneous reverse water-gas shift reaction[J].AIChE Journal,2004,50(5):1028-1041.
[16]吴家桦,沈来宏,肖军,王雷,郝建刚.串行流化床生物质气化制取合成气试验研究[J].中国电机工程学报,2009,29(11):111-118.Wu Jiahua,Shen Laihong,Xiao Jun,Wang Lei,Hao Jiangang.Experimental study on syngas production from biomass gasification in interconnected fluidized beds[J].Proceedings of the CSEE,2009,29(11):111-118.