Pyrolysis and combustion characteristics of aluminum hydride coated with an oxide layer and stearic acid

Wenjuan Li, Jiefan Zhang, Xin Zhang, Zhuanghong Zhou, Yanhua Lan, Yun Zhang, Fengyuan Jiao, Siyu Xu, Haixia Zhao, Yongan Feng and Weiguo Cao

Energy, 2025, vol. 333, issue C

Abstract: To explore the mechanism of the hydrogen storage materials by coating, the pyrolysis and combustion characteristics of aluminum hydride (AlH3) coated with an oxide layer (Al2O3) and stearic acid (C18H36O2) through reaction molecular dynamics and dust minimum ignition temperature experiments are investigated. The minimum ignition temperature of 335 °C for AlH3/C18H36O2 dust cloud is obtained with a mass concentration of 500 g/m3. In the initial stage of pyrolysis and combustion of AlH3, the structure of the AlH3 nanoparticle becomes irregular and the H-Al bond breaks rapidly. Due to the existence of the coating layers, the release of H atoms should first pass through the coating layers, resulting in the reduction of the reaction rate. H2 and H2O are produced after the release of H atoms, as the main final products in pyrolysis and combustion, respectively. C2H4 is the main intermediate product because of the coating of C18H36O2. The remaining atoms of C, O, and Al combine to form Al-C-O clusters, and C-Al bonds show an increasing trend during the pyrolysis and combustion, indicating the formation of clusters. The results are expected to provide basic data support for the safe application of AlH3.

Keywords: AlH3@Al2O3/C18H36O2; Minimum ignition temperature; Coating layers; Reaction mechanism (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544225031342
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:333:y:2025:i:c:s0360544225031342

DOI: 10.1016/j.energy.2025.137492

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().