Application of thermogravimetry to study the kinetics and stability of porphyrin copper-sodium of ephedra |
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Authors: | Zhang Lian-ru Yang Tian-ming Zou Guo-lin |
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Affiliation: | (1) College of Life Sciences, Wuhan University, 430072 Wuhan, China |
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Abstract: | Thermogravimetry was used to study the non-isothermal decomposition kinetics and the stability of porphyrin copper-sodium from ephedra. The kinetic equation for the second step can be expressed as . The kinetic compensation effect is found to be: InA=0. 2468E a −8. 0513.Ea is 206. 61 kJ/mol. The results show that porphyrin copper-sodium has a high activation energy and good stability. Biography: Zhang Lian-ru(1964), female, lecturer Research direction, applied biochemistry. |
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Keywords: | porphyrin copper-sodium TG-DTG activation energy non-isothermal kinetics |
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