蒸汽爆破玉米秸秆热解特性及其动力学分析
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国家农业科技成果转化资金资助项目(No.2006G B2D000173);国家自然科学基金资助项目(No.70741032)


Pyrolysis characteristics and kinetic ananlysis of corn stalks by steam explosion
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    摘要:

    生物质的热解作为生物质能研究开发的前沿技术已得到较为广泛的重视。本文采用热重分析法(thermo gravimetric analysis,TGA)对蒸汽爆破预处理后玉米秸秆的热失重特性及其动力学进行了研究。试样加热速率分别为10、20、30、40、50℃/min,加热终温为800℃,采用高纯氮气作为保护气体。结果表明:蒸汽爆破预处理后玉米秸秆在同样加热速率条件下,热解过程特性显著改变,最大热分解速率提高34.57%;分别利用Coats-Redfern法和Kissinger法确定了热解动力学参数,并获得热解动力学模型;试样与原玉米秸秆相比活化能(E)降低24.13%~32.56%,指前因子(A)提高8%~10%。

    Abstract:

    The front technology of biomass pyrolysis used for biomass energy research and development has been more widely appreciated. The pyrolysis characteristics and dynamics of corn stalks by steam explosion pretreatment were studied using the thermal gravimetric analysis (TGA) method under different heating rate, i.e., 10℃, 20℃, 30℃, 40℃ and 50℃/min.The terminal temperature was 800℃ and the high-purity N2 was used as reacting and protecting gas.The results indecated that the pyrolysis characteristics and parameters of corn stalks by steam explosion were significantly changed, and maximum thermal decomposition rate increased by 34.57% under the same heating rate. Thermogravimetric dynamic parameters of samples were calculated by the methods of Coats-Redfern and Kissinger,respectively; activation energies of treated corn stalks reduced 24.13%-32.56% compared with corn stalks,and frequency factor improved 8%-10%.

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任天宝,马孝琴,徐桂转,宋安东,张百良.蒸汽爆破玉米秸秆热解特性及其动力学分析[J].农业工程学报,2011,27(13):32-36.

Ren Tianbao, Ma Xiaoqin, Xu Guizhuan, Song Andong, Zhang Bailiang. Pyrolysis characteristics and kinetic ananlysis of corn stalks by steam explosion[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE),2011,27(13):32-36.

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  • 收稿日期:2010-12-31
  • 最后修改日期:2011-02-17
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