标题：Hydrogen desorption kinetics of magnesium hydride
作者：Zhang, Xiaoli ;Wang, Naifei ;Li, Tao ;Zhang, Qianqian ;Zhou, Shixue
作者机构：[Zhang, Xiaoli ;Wang, Naifei ;Li, Tao ;Zhang, Qianqian ;Zhou, Shixue ] College of Chemical and Environmental Engineering, Shandong University of Scien 更多
来源：Gongneng Cailiao/Journal of Functional Materials
摘要：The hydrogen storage material MgH2 was prepared by mechanical milling of magnesium under hydrogen atmosphere for 3 h with bituminous coal and crystallitic carbon which was prepared from anthracite coal by alkaline melting, acid rinsing treatment and carbonization, as milling aid. The volumetric method under the isothermal process was introduced in experiment of hydrogen desorption and the activation energy is calculated to be 104.85 kJ/mol according to Arrhenius equation and the data of hydrogen desorption. TPD curves of the material under non-isothermal process were measured by temperature programmed desorption method and the activation energy was calculated by Kissinger equation and Sharp equation. The activation energy of hydrogen desorption is 105.87 kJ/mol calculated by Kissinger equation according to TPD curves and it is 108.33, 98.70 and 113.19 kJ/mol at the heating rate 5, 10 and 15/min, respectively. Both isothermal method and non-isothermal method can be used for the calculation of activation energy and the values are different because of that their equations, theories and the data they employed are different. ©, 2015, Journal of Functional Materials. All right reserved.