Revision as of 01:34, 5 February 2018

Basics

Although hydrogen if a good fuel, its storage can be complicated. Thus this page was made.

350-700 bar - [1] - - $3150 - 1400 gallons STP - 4.8 or 2.4 kg hydrogen at 700 or 350 bar. This is about 2.5 or 5 gallons of fuel equivalent. For a 100 mpg car, this is 250 or 500 mile range.
Electrolyzers can produce hydrogen at pressure, so a compressor is not needed.
A high pressure steel tank is about $500 - [2]
The simplest tank that can be used is a steel tank for up to 200 bar. This appears to be the lowest cost option. [3]

Standard tanks are 55" high and 9" wide. with 45x9 inch usable size. 50L? - about 12 gallon, yes, 50L. If 200 atmospheres, that is 2400 gallon equivalent. 4 of these store 10000 gallons - 1.7 gallon gasoline equivalent - but the efficiency of a hydrogen engine is 2x that of gasoline, so it's effectively 3.4 gallons by comparison. That is acceptable for a microcar, though cylinder weight is 143 each or 572 lb for the tanks themselves - a significant tradeoff for a 750 lb microcar. In the first iteration, a microcar could use 1 of these as a proof of concept for a 100 mile designed range at 750 lb of weight.

Cost targets - https://energy.gov/eere/fuelcells/hydrogen-storage
1kWhr=3.6MJ. 1 kG of hydrogen is 142MJ/kg
Cost for car tanks target - $15/kWhr - or about 40x for 1 kG - $600/kg. (above reference)
Cost or stationary storage goal - $1000/kg - [4]

Convert to Methane by the Sabatier Reaction
That can be compressed/liquified as is or it could be further converted into other fuels:
- Methanol can be made from methane via the following process Listed Here
- Dimethyl Ether can be made from Methanol This Details How
- Dimethyl Ether Can be Catalytically Converted to Hydrocarbons such as Gasoline This Details How
Hydrogen + Carbon Monoxide can be directly converted to hydrocarbons via the Fischer Tropsch Process

This reports the cost of tanks at low-thousands scale for a car - [9]
Energy.gov state of art technology report - [10]
In an open source economy, these costs make hydrogen storage feasible at today's prices - deployable via community-supported manufacturing.
Another USA ".gov" site on hydrogen storage

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 =Basics=
+*Although hydrogen if a good fuel, its storage can be complicated.  Thus this page was made.
-*Although hydrogen if a good fuel, its storage can be complicated.  Thus this page was made
 =High Pressure Hydrogen=
@@ Line 31: / Line 26: @@
 *Low, medium, and high pressure storage options - [https://pureenergycentre.com/hydrogen-storage/]
 *Pictures of storage tanks - [https://www.google.com/search?q=hydrogen+storage+tanks&client=ubuntu&hs=h8e&tbm=isch&source=lnms&sa=X&ved=0ahUKEwjllc2L3KHYAhUqxoMKHay7CkkQ_AUI5gEoAQ&biw=1376&bih=788#imgrc=J0pfT75ID0DIDM:]
 =Cryogenic Liquid Storage=
@@ Line 41: / Line 32: @@
 *Can be done using a Delwar, a pure hydrogen gas source, and a cheap cryocooler
 *A diy cryocooler could possibly be made to reduce costs further
 =Storage as a Synthesized Fuel=
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 ** Dimethyl Ether Can be Catalytically Converted to Hydrocarbons such as Gasoline [https://en.wikipedia.org/wiki/Syngas_to_gasoline_plus This Details How]
 * Hydrogen + Carbon Monoxide can be directly converted to hydrocarbons via the [https://en.wikipedia.org/wiki/Fischer–Tropsch_process Fischer Tropsch Process]
 =See Also=
 *[[Gas_Storage_in_PVC_Pipe]] -  10000 gal STP is 1.7 kg of hydrogen.
 *[[Open Source Fuels Construction Set]]
 =Useful Links=