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, -2612 KJ/mol or 56.8 MJ/kg (better than methane 55 MJ/kg);
- decent liquid density, 0,628 kg/l (better than liquid methane 0.422 kg/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 21.7 g/mol (better than methane 23.2 g/mol). Fuel rich combustion has even lower average gas mass because CH6Si decomposes to SiC and 3H2.
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;
- possibly 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 its use in rocketry?