A process 8 wherein the hydrogen diffusion membrane and {HEAD ~ the methanation catalyst} of the gas separation device function within {TAIL ~ similar temperature ranges} 
function within
A process 8 wherein the hydrogen diffusion membrane and { HEAD ~ the methanation catalyst } of the gas separation device function within { TAIL ~ similar temperature ranges }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL