Ignition of boron-based green hypergolic fuels with hydrogen peroxide

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Exploring novel green hypergolic fuels ignited with hydrogen peroxide (H2O2) offers a number of opportunities in space propulsion with regard to replacing conventional toxic propellant combinations. The green hypergolic fuels, B-H bond-rich zwitterions and ionic liquids (ILs) were synthesized; their hypergolic reactivity was investigated with 95% H2O2. Remarkably, ammonia borane (AB) and 1-ethyl-3-methyl imidazolium borohydride ([EMIM][BH4]) exhibited the lowest ignition delay times of 8.1 and 18.5 ms, respectively. For a comprehensive application, the reactivity of liquid and hybrid fuel blends were studied. A liquid fuel blend, [EMIM][BH4] and methyl imidazolium borane (MIMB) (1: 1, w/w) exhibited the ignition delay time of about 35 ms. Further, a solid hybrid fuel blend consisting of 40% AB-paraffin revealed a hypergolic ignition delay time of 9.2 ms. Additionally, the gas phase heat of formation and specific impulse were calculated using G09 and NASA-CEC-71 programs, respectively. The specific impulse of AB was 273 s, which is higher than the stated hypergolic zwitterions. Hence, the B-H bond-rich zwitterions and ILs are promising choices for new generation green hypergolic liquid and hybrid rocket propulsion.
Publisher
ELSEVIER SCI LTD
Issue Date
2019-11
Language
English
Article Type
Article
Citation

FUEL, v.255

ISSN
0016-2361
DOI
10.1016/j.fuel.2019.115729
URI
http://hdl.handle.net/10203/266599
Appears in Collection
AE-Journal Papers(저널논문)
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