Abstract
AbstractThis article gives a short review on compatibility and chemical stability of selected aqueous ADN and HAN‐based energetic formulations. A brief introduction will outline Energetic Ionic Liquids (EILs) as a new class of energetic materials with beneficial physical‐chemical properties which make them valuable for application in propulsion technologies. EILs combine the advantages of e. g. low toxicity, showing equal or superior propulsion power compared to the state‐of‐the‐art monopropellant hydrazine. Focus is set on open access ADN and HAN‐based monopropellant formulations that are e. g. realized in the advanced blends LMP‐103S, FLP‐106 or LGP 1845.
Highlights
Ionic liquids (ILs) are salts that consist of inorganic or organic cations and large weakly-coordinating anions
Two green Energetic Ionic Liquids (EILs) have raised from low TRL to final technical applications: Ammonium dinitramide (ADN) and Hydroxylammonium nitrate (HAN)
Binary HAN-water and HAN containing propellant mixtures with a high content of EIL are extremely sensitive to metals of the platinum group which act as catalytic active material [9]
Summary
Ionic liquids (ILs) are salts that consist of inorganic or organic cations and large weakly-coordinating anions. As a new sub-group of green propellants, green energetic ionic liquids moved into the focus of interest They are characterized by a missing of halogenatoms in their structures. In propulsion technology the definition of ionic liquids is further expanded to liquid aqueous solutions or melts of these salts which are explicitly used in combustors. In combination with their physical-chemical properties, they open a way to safer handling procedures with reduced toxicity hazards and costs. Within this approach, two green EILs have raised from low TRL to final technical applications: Ammonium dinitramide (ADN) and Hydroxylammonium nitrate (HAN)
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