I am considering a compressed gas cooking system for ultra-light wilderness ventures. The benefits of weight, efficiency, and ease of use of the Jet Boil and MSR Reactor are attractive. My hang ups regard environmental and practical concerns. While most manufactures advertise these cartridges can be recycled, I find this to be very difficult in most locals. Nor do I see the practicality, on extended expeditions, of hauling multiple canisters.
For these reasons I have been exploring the use of a re-usable composite bottle. Driven by the popularity of paintball guns, small carbon fiber reinforced compressed gas cylinders are mass produced and readily available (http://www.airhog.com/mini_tanks.htm). The compressed gasses typically used in these bottles require higher PSI values then butane or even propane. The bottleneck in employing these tanks for ultra-light stoves is both the valve system and ability to refill them.
For a propone tank under 4 pounds an OPD (overfill protection device) is not required. However, standard propone refill stations (Suburban Propane) are not equipped to handle small tanks. Isobutene and propone/butane mixes are not readily available. We do not have a gas/welding supply outlet in my town so I have not been able to inquire about their capabilities. It appears a personal refill station maybe required.
To my knowledge the Lindal Group does not produce a valve that would work with composite bottles nor designed for refilling. Standard propane valves are heavy and would negate many of the benefits of a re-usable composite bottle.
Has anyone else thought of this? What did your learn? Any ideas regarding valves, re-filling, legality, and hazards are welcome.