Hmm. Reminds me of the SolChem work of the US NRL in the early 80's.
Solar heated catalysts --> shifts balance of chemical mixture --> released by reverse catalysts into tank of aerosol cans filled with salt eutectic (cans keep the mix water vapor free and partition massive volume change as it goes solid --> liquid).
The US Navy never wanted to be reliant on foreign oil for its fleet ever again.
Then Regan got elected, oil was cheap and the research got shut down.
SolChem became an old cover story in PopSci, where I found it looking through the stacks one day.