Yes, that would be great if we could get one of those students to come here.
I've spent some time researching this today and here is some of what I found.
https://en.wikipedia.org/wiki/Activated_carbon
Alternative Energy and Fuel News: Adsorbed Natural Gas: fuel storage solution?
http://www1.eere.energy.gov/cleancit...11_pfeifer.pdf
http://144.206.159.178/ft/69/867987/15147188.pdf
There are a lot of technical papers on the web about this.
This doesn't seem to be rocket science. One should be able to come up a usable tank of their own design easily. Most of the articles quote 500psi (35 bar). However, since you only require a short range vehicle, a propane tank with activated carbon filled by a standard two stage oil less air compressor to say maybe 175 psi should do the trick.
Activated carbon is not that expensive in bulk.
Google
Time to experiment...
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