Impact of HAN Ternary Propellant System Decomposition on Catalytic Sustainability

Agnihotri, R and Oommen, C (2021) Impact of HAN Ternary Propellant System Decomposition on Catalytic Sustainability. In: Propellants, Explosives, Pyrotechnics .

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Abstract

Aqueous solution of Hydroxylammonium nitrate (HAN) in combination with a suitable fuel has been explored as a promising high performing green monopropellant in recent times. The current study primarily explores the effect of the addition of a fuel component into HAN solution on the sustainability of a recently developed catalyst which was examined for the only binary system consisting of HAN and water. The HAN ternary system examined was HAN: methanol: water in 70 : 15 : 15 (w/w) composition. The endurance of an �iridium over alumina� catalyst and an indigenously developed cobalt doped ceria-based catalyst was analysed using a batch reactor wherein a pressure rise during decomposition of propellant whilst a pulse mode operation was monitored. Catalysts were also characterized via SEM/EDS, XRD, and XPS to identify changes over the period of sequential injection in the batch reactor. Doped ceria catalyst was found to be far robust and resistant to any poisoning when compared to iridium catalyst at run time of the operation involving nearly 45 sequential injections of propellant over the catalyst. © 2021 Wiley-VCH GmbH

Item Type:	Journal Article
Publication:	Propellants, Explosives, Pyrotechnics
Publisher:	Wiley-VCH Verlag
Additional Information:	The copyright of this article belongs to Wiley-VCH Verlag
Keywords:	Alumina; Aluminum oxide; Batch reactors; Cerium oxide; Iridium; Propellants; Sustainable development, Binary systems; Doped ceria; Fuel components; Hydroxylammonium nitrate; Iridium catalyst; Pressure rise; Propellant systems; Sequential injection, Catalyst poisoning
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	05 Mar 2021 10:56
Last Modified:	05 Mar 2021 10:56
URI:	http://eprints.iisc.ac.in/id/eprint/68071

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