Hydride- and boron-free solid hypergolic H2O2-ignitophores

Jagadish Das, Daniel Shem-Tov, Shuaizhong Wang, Lei Zhang*, Eli Flaxer, Shijie Zhang, Jörg Stierstorfer, Kangcai Wang, Qi Long Yan, Roman Dobrovetsky, Michael Gozin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The race and competition in aerospace technologies based on environmentally friendly green propulsion systems with green fuels and oxidizers are attracting a significant attention. Development of hybrid propulsion systems that use a hypergolic fuel and green H2O2 oxidizer, capable of deep throttling and restarting from “cold”, is a very challenging task. Here, we describe a new synthetic approach for the synthesis and characterization of conceptually new hydride- and boron-free, and air/moisture stable solid H2O2-hypergols, based on Cu and Co complexes of bis(5-tetrazolyl) amine (H2BTA) ligand. Among prepared and evaluated materials, the best performing compound [K2(H2O)2Cu(BTA)2]n (JD-4) was found to exhibit short ignition delay time of 7 ms (with H2O2, 97%), and high thermostability of 343 °C. Based on obtained ignition results, X-ray crystallography and HASEM software calculations, structure-hypergolic activity-relationship studies were conducted. We found that the electron density difference between Cu and BTA units should be in a specific range (~2) for these compounds to ignite, providing a valuable tool for further development of novel, green, solid fuels for propulsion systems.

Original languageEnglish
Article number131806
JournalChemical Engineering Journal
Volume426
DOIs
StatePublished - 15 Dec 2021

Funding

FundersFunder number
ADAMA Center for Novel Delivery Systems
Zelinsky Institute of Organic Chemistry
National Natural Science Foundation of China21805255, 12072045
Russian Academy of Sciences
Tel Aviv University

    Keywords

    • Green Propellant
    • Hybrid Propulsion
    • Hydrogen Peroxide
    • Hypergolic Reaction
    • Metal Organic Framework

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