If yes, the consequences for energy storage might be significant. The energy density of propane is 49.6 MJ/kg. Apparently, Li-Ion batteries are about 0.8 MJ/kg, more than 50x the difference.
AFAIK both fuel cells like that, and the inverse carbon capture machines, are technically possible for decades now. The issue is high cost due to precious metals in the catalyst.
Apparently, these guys have solved the issue with much cheaper stuff for the catalyst, molybdenum phosphide.
Months. I have a residential sized propane tank for gas and backup power that only gets refilled once a year at most. Worst case scenario I can go off grid for two to three months in the summer on a generator (tested frequently) and this is a pretty standard size for exurban houses in California.
Could you elaborate on that? I imagine most people do not have any concept of that. Are you talking basketball, person, tiny car, SUV, or something else in terms of size? I'm imagining something between tiny car and SUV.