Methylsilane CH6Si seems to have some useful properties for rocket fuel:
- High hydrogen content, 6 atoms per molecule, 13% of overall mass,
- High combustion energy, -2612KJ/mol or 56.8 MJ/kg (better than methane 55MJ/kg),
- Decent liquid density, 0,628kg/l, (better than liquid methane 0.422kg/l), 11% higher hydrogen content per volume than liquid hydrogen itself,
- non cryogenic, self pressurizing storage, 14 bar of pressure at 21°C, critical temperature 79.3°C,
- low average molar mass of gaseous stoichiometric combustion products 21.7g/mol (better than methane 23.2 g/mol). Fuel rich combustion has even lower average gas mass because CH6Si decompose to SiC and 3xH2.
But there are some drawbacks:
- solid particles of SiO2 and traces of SiC in exhaust, but less solid residue in exhaust than in solid fuels,
- possible pyrophoric in high humidity atmosphere, but non pyrophoric in standard conditions,
- non toxic but harmful to inhalation and skin exposure.
Considering all of data, they show promise, but are there any works related to it's use in rocketary?