Compressed hydrogen
Compressed hydrogen (CH2, CGH2 or CGH2) is the gaseous state of the element hydrogen kept under pressure. Compressed hydrogen in hydrogen tanks at 350 bar (5,000 psi) and 700 bar (10,000 psi) is used for mobile hydrogen storage in hydrogen vehicles.[1] It is used as a fuel gas.
 | |
 | |
| IUPAC | Compressed hydrogen |
|---|---|
| Other names | Hydrogen under pressure, CGH2, CGH2 |
| UN number | 1049, Class 2 |
| IMO | 1049, Class 2.1 |
| DOT | 1049, Class 2.1 |
| ADR | 1049, Class 2.1 |
| IATA | 1049, Class 2.1 |
| WHMIS | A, B1 |
| RTECS | MW8900000 |
| PEL-OSHA | Simple asphyxiant |
| ACGIH TLV-TWA | Simple asphyxiant |
| Appearance | Colorless, odorless |
| LEL | 4 % |
| UEL | 75 % |
| Auto ignition | 500 °C (932 °F) |
Infrastructure
Compressed hydrogen is used in hydrogen pipeline transport and in compressed hydrogen tube trailer transport.
gollark: My "fix" is this:```lua--[["Fix" for bug PS#E9DCC81BSummary: `pcall(getfenv, -1)` seemingly returned the environment outside the sandbox.Based on some testing, this seems like some bizarre optimization-type feature gone wrong.It seems that something is simplifying `pcall(getfenv)` to just directly calling `getfenv` and ignoring the environment... as well as, *somehow*, `function() return getfenv() end` and such.The initial attempt at making this work did `return (fn(...))` instead of `return fn(...)` in an attempt to make it not do this, but of course that somehow broke horribly. I don't know what's going on at this point.This is probably a bit of a performance hit, and more problematically liable to go away if this is actually some bizarre interpreter feature and the fix gets optimized away.Unfortunately I don't have any better ideas. Also, I haven't tried this with xpcall, but it's probably possible, so I'm attempting to fix that too.]]local real_pcall = pcallfunction _G.pcall(fn, ...) return real_pcall(function(...) local ret = {fn(...)} return unpack(ret) end, ...)end local real_xpcall = xpcallfunction _G.xpcall(fn, handler) return real_xpcall(function() local ret = {fn()} return unpack(ret) end, handler)end```which appears to work at least?
gollark: Fixed, but I don't really know how or why.
gollark: ... should I create a bug report?
gollark: It returns two, actually. The second one. I don't know *what* the first one is doing.
gollark: Is this some weird implementation thing or is Lua actually defined/specified to work like this?!
See also
References
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.