Kinetic model analysis and mechanistic correlation of ammonia borane thermolysis under dynamic heating conditions. (31st May 2018)

• Record Type: Journal Article
• Authors: Roy, Binayak; Hajari, Animesh; Kumar, Vinit; Manna, Joydev; Sharma, Pratibha
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 22(2018)
• Page Start: 10386
• Page End: 10395
• Publication Date: 2018-05-31
• Subjects: Ammonia borane -- Solid state kinetics -- Prout Tompkins model -- Autocatalysis -- Thermolysis -- Hydrogen; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.04.124
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Solid state decomposition of ammonia borane has been extensively reported to follow the Avrami-Erofe'ev equation. In this work, thermal analysis of ammonia borane is carried out under dynamic heating conditions under heating rate of 1–5 °C/min. The experimentally derived kinetic data is fitted against various solid state decomposition and autocatalytic kinetic models. It has been observed that the two steps of ammonia borane decomposition reactions follow different kinetics. The first step is more likely to be associated with the homogeneous autocatalytic reactions where the second part demonstrates the traditional nucleation growth kinetics. Highlights: Kinetic analysis of ammonia borane at different heating rates. Applicability of Prout-Tompkins and Avrami-Erofe'ev models on two step thermolysis reaction of ammonia borane. First decomposition step obeys Prout-Tompkins kinetic model, explaining the associated autocatalytic mechanism.