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Citation: Cheng Qing-Tang, Li Jing-Hua, Lou Xiang-Dong. Investigation on Dehydration of Calcium Oxalate Monohydrate by Correlative Judging Method[J]. Acta Physico-Chimica Sinica, ;1993, 9(05): 675-678. doi: 10.3866/PKU.WHXB19930519 shu

Investigation on Dehydration of Calcium Oxalate Monohydrate by Correlative Judging Method

1.
Department of Chemistry, Henan University, Xinixang 453002

Received Date: 1 February 1992
Available Online: 15 October 1993

The kinetic parameters and mechanism of dehydration of CaC_2O_4·H_2O have been studied by correlative judging method on the basis of thermogravimetry experiments. Results show that thermal dehydration of CaC_2O_4·H_2O is regulated by an A_3 mech-anism, i.e. random nucleation followed by subsequent growth. The kinetic parame-ters obtained are as follows: activation energy E=85.15 kJ·mol~(-1), frequency factor A=5.58×10~8 min~(-1), the compensation equation is log A=0.1119E-0.7832.
- Calcium of oxalate; Thermogravimetry; Correlative judging method
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