Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 46, Issue 7, Pages 2047-2053Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ie061551m
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The production of ammonia via a two-step cyclic process is considered, consisting of an endothermic carbo-reduction of Al2O3 in a N-2 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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