吸热过程
氨生产
氨
放热反应
热重分析
水解
阿累尼乌斯方程
催化作用
动能
化学
氮化物
无机化学
动力学
材料科学
化学工程
热力学
物理化学
活化能
有机化学
吸附
物理
量子力学
图层(电子)
工程类
作者
María Elena Gálvez,A. Frei,M. Halmann,Aldo Steinfeld
摘要
The production of ammonia via a two-step cyclic process is considered, consisting of an endothermic carbo-reduction of Al2O3 in a N2 atmosphere to form AlN, followed by exothermic steam-hydrolysis of AlN to produce NH3 and to reform Al2O3. The chemical kinetics of both steps were experimentally investigated by thermogravimetry and gas chromatography, without added catalysts and under external supply of process heat. Rate laws and the corresponding Arrhenius kinetic parameters were determined by applying the unreacted core model for the AlN production and the shrinking core model for the AlN hydrolysis.
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