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