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

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

Keywords

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

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