Yes, but the process then becomes biofuel, which also soaks up land area and has other issues (warping world food prices). It would also be nice to be able to

Yes, but the process then becomes biofuel, which also soaks up land area and has other issues (warping world food prices). It would also be nice to be able to capture the energy output of other energy sources, e.g. nuclear in a nice, energy-dense liquid form.