| 多升温速率等温法的动力学分析在一水草酸钙脱水反应中的应用 |
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| 引用本文： | 李丽清,陈栋华,沈玉芳.多升温速率等温法的动力学分析在一水草酸钙脱水反应中的应用[J].中南民族大学学报(自然科学版),2003,22(4). |
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| 作者姓名： | 李丽清 陈栋华 沈玉芳 |
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| 作者单位： | College of Chemistry and Life Science，South-Central University for Nationalities，College of Chemistry and Life Science，South-Central University for Nationalities，College of Chemistry and Life Science，South-Central University for Nationalities |
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| 基金项目： | 湖北省自然科学基金重点资助项目 (2 0 0 1ABA0 0 9) |
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| 摘 要： | 用一种新的方法求算热分析动力学的三因子 :(1)用迭代的等转化率法求出较为可靠的 Ea;(2 )用多升温速率等温法判定出可能的机理函数 ,并在 Ea和的基础上计算出 A.用该法对一水草酸钙 (Ca C2 O4· H2 O)脱水反应的热分析动力学三因子进行研究 ,得出其对应的机理函数的方程为 ;f (a) =n(1-a) 1- 1/n;Ea为 82 .83 k J· mol- 1;A为 1.14 2× 10 5～ 1.2 3 5× 10 5s- 1
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| 关 键 词： | 多升温速率等温法 迭代的等转化率法 一水草酸钙 |
Thermal Analysis Kinetics Studies on the Dehydration of Calcium Oxalate Monohydrate |
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| LI Liqing,Chen Donghua,Shen Yufang.Thermal Analysis Kinetics Studies on the Dehydration of Calcium Oxalate Monohydrate[J].Journal of South-Central Univ for,2003,22(4). |
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| Authors: | LI Liqing Chen Donghua Shen Yufang |
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| Abstract: | The thermal kinetics of dehydration for calcium oxalate monohydrate is studied by DSC technique. A new multiple rate iso-temperature method is applied to determine the kinetic model. A iterative iso-temperature procedure is used to estimate apparent activation energy Ea; the pre-exponential factor A was obtained on the basis of Ea and g(α). using this method, it is determined that the kinetic model of calcium oxalate monohydrate is f(α)=n(1-α)1-1/n, apparent activation energy Ea is 82.83 kJ/mol, pre-exponential factor A is 1.142×105～1.235×105 s-1. |
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| Keywords: | multiple rate iso-temperature method iterative iso- conversional procedure calcium oxalate monohydrate |
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