JOURNAL OF LIGHT INDUSTRY

CN 41-1437/TS  ISSN 2096-1553

热重分析法研究小米挤压膨化产品的干燥动力学

赵学伟 ,  魏益民 ,  张波

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赵学伟, 魏益民, 张波. 热重分析法研究小米挤压膨化产品的干燥动力学[J]. 轻工学报, 2011, 26(4): 17-21. doi: 10.3969/j.issn.1004-1478.2011.04.004
引用本文: 赵学伟, 魏益民, 张波. 热重分析法研究小米挤压膨化产品的干燥动力学[J]. 轻工学报, 2011, 26(4): 17-21. doi: 10.3969/j.issn.1004-1478.2011.04.004
shu
ZHAO Xue-wei, WEI Yi-min and ZHANG Bo. Study on drying kinetics of millet extrudate by thermogravimetry[J]. Journal of Light Industry, 2011, 26(4): 17-21. doi: 10.3969/j.issn.1004-1478.2011.04.004
Citation: ZHAO Xue-wei, WEI Yi-min and ZHANG Bo. Study on drying kinetics of millet extrudate by thermogravimetry[J]. Journal of Light Industry, 2011, 26(4): 17-21. doi: 10.3969/j.issn.1004-1478.2011.04.004
shu

热重分析法研究小米挤压膨化产品的干燥动力学

  • 郑州轻工业学院 食品与生物工程学院, 河南 郑州 450002;

  • 中国农业科学院 农产品加工研究所, 北京 100094

  • 中图分类号: TS210.1

Study on drying kinetics of millet extrudate by thermogravimetry

  • College of Food and Bioeng., Zhengzhou Univ. of Light Ind., Zhengzhou 450002, China;

  • Inst. of Agro-Food Sci. and Tech., CAAS, Beijing 100094, China

  • Received Date: 2011-04-15
    Available Online: 2011-07-15

    CLC number: TS210.1

  • 摘要: 采用非等温热重分析法研究了小米挤压膨化产品的干燥动力学,升温速率分别为2℃/min,6℃/min,10℃/min,15℃/min,20℃/min.采用FWO法、KAS法以及迭代法对热重数据进行分析,求解干燥活化能.根据求得的活化能,由Coats-Redfern方程和Achar方程确定最概然机理函数,并进行指前因子A和反应级数n的求解.结果表明:干燥过程遵循简单级数模型,平均活化能为89.42KJ/mol,n和A的值随升温速率的不同而有所变化,分别为3.17~3.55和2.62×1012~4.63×1012.
    Abstract: The drying kinetics of millet extrudate was investigated by non-isothermal thermogravimetry at five heating rate(2℃/min,6℃/min,10℃/min,15℃/min,20℃/min).The drying measurements was analysed by FWO,KAS and iterative procedure for the determining of activation energy Ea.With the value ofEa,Coats-Redfern and Achar equations were combined for confirming the most probable mechanism,and calculating the pre-exponental factor A and reaction order n.The results demonstrated that the drying mechanism was dominated by a n-order kinetics where n was 3.17~3.55 and A was 2.62×1012~4.63×1012,the n and A value was changed at different heating rate.The average activation energy was 89.42 kJ/mol.
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  • 收稿日期:  2011-04-15
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赵学伟, 魏益民, 张波. 热重分析法研究小米挤压膨化产品的干燥动力学[J]. 轻工学报, 2011, 26(4): 17-21. doi: 10.3969/j.issn.1004-1478.2011.04.004
引用本文: 赵学伟, 魏益民, 张波. 热重分析法研究小米挤压膨化产品的干燥动力学[J]. 轻工学报, 2011, 26(4): 17-21. doi: 10.3969/j.issn.1004-1478.2011.04.004
shu
ZHAO Xue-wei, WEI Yi-min and ZHANG Bo. Study on drying kinetics of millet extrudate by thermogravimetry[J]. Journal of Light Industry, 2011, 26(4): 17-21. doi: 10.3969/j.issn.1004-1478.2011.04.004
Citation: ZHAO Xue-wei, WEI Yi-min and ZHANG Bo. Study on drying kinetics of millet extrudate by thermogravimetry[J]. Journal of Light Industry, 2011, 26(4): 17-21. doi: 10.3969/j.issn.1004-1478.2011.04.004
shu

热重分析法研究小米挤压膨化产品的干燥动力学

  • 郑州轻工业学院 食品与生物工程学院, 河南 郑州 450002;
  • 中国农业科学院 农产品加工研究所, 北京 100094
  • 收稿日期: 2011-04-15
  • 网络出版日期: 2011-07-15

摘要: 采用非等温热重分析法研究了小米挤压膨化产品的干燥动力学,升温速率分别为2℃/min,6℃/min,10℃/min,15℃/min,20℃/min.采用FWO法、KAS法以及迭代法对热重数据进行分析,求解干燥活化能.根据求得的活化能,由Coats-Redfern方程和Achar方程确定最概然机理函数,并进行指前因子A和反应级数n的求解.结果表明:干燥过程遵循简单级数模型,平均活化能为89.42KJ/mol,n和A的值随升温速率的不同而有所变化,分别为3.17~3.55和2.62×1012~4.63×1012.

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