Some Remarkable Properties of Metallic Hydrogen•Recombination of hydrogen atoms releases 216 MJ/kg•Hydrogen/Oxygen combustion in the Shuttle: 10 MJ/kg•TNT 4.2 MJ/kg•Theoretical Specific Impulse, Isp•Metallic Hydrogen 1000-1700s•Molecular hydrogen/oxygen ~460 s (space shuttle)•Metallic density about 12-13 [Personal Edit ( is actually) ] 15 fold of liquid molecular hydrogen [lab results of actual metallic hydrogen was 15 times denser]•Sufficient thrust for single-stage to orbit; explore outer planets
IF "big if" everything turned out fine, the 6K combustion temps (if you don't dilute it) would be the next issue for turning it into a rocket fuel. Is there any material that can withstand that temp? I can't think of any currently.
my guess is at that temp it would be a plasma. i think it would have to be. its the bit in between that worries me.
Looking through some of the previous attempts to produce metallic hydrogen, it seems like there was some talk that it might not even be a solid at all but some new fluid-like phase of matter. Is the mH Harvard claims to have produced a solid / solid-like? Can't find it. In one of Dr. Silvera's powerpoint presentations he makes reference both to a theorized liquid metallic and a solid metallic phase. http://www.nasa.gov/pdf/637123main_Silvera_Presentation.pdf
Cheers, yeah I saw the phase diagram and was looking at it... only it's been a long time since 10th grade chem. It seemed that should be a lot less difficult to produce than solid, so if we were hearing about producing metallic hydrogen it'd've been the easier one first. But after looking through the paper again and seeing those few references to lmH, it seems it's already been synthesized? Is it just an experimental curiosity then without applications?
My question is: how much does it cost to make enough metallic hydrogen for a SSTO launch with 25 tonnes of payload? If it costs too much, then there is little point to it unless there is a path towards bringing costs down.
Are there any other interesting theoretical fuels out there which might be synthesized and haven't been yet?
By the way why is it appearing on a site like this first rather than a more mainstream science site?
Quote from: Elmar Moelzer on 11/06/2016 06:39 PMMy question is: how much does it cost to make enough metallic hydrogen for a SSTO launch with 25 tonnes of payload? If it costs too much, then there is little point to it unless there is a path towards bringing costs down.Until last month the price per kg was infinity, now after producing however much they did it's probably down into the mere quadrillions- so one month from now it should be completely free. If it is a room temperature super conductor, they'll certainly be interested in producing as much of it as they can... who knows how easy or difficult it will be to produce it in 30, or 50, or 100 years, fingers crossed...Hadn't heard about metallic hydrogen as a potential chemical fuel before, but apparently it's been theorized for some time. Are there any other interesting theoretical fuels out there which might be synthesized and haven't been yet?