Post by engineerpoet on May 11, 2019 10:06:42 GMT 9.5
If you're starting from methane you're either using biogas or natural gas. There's a fair energy hit going from CH4 to MeOH; you go from 891 kJ/mol down to 726 kJ/mol, a loss of about 20%. The only real plus to doing this is if you have methane that you can't ship and need to turn it to a liquid, or need it for e.g. pipeline antifreeze.
I sort of recall seeing a scheme using enzymes which converted CO2 to MeOH essentially by reversing the normal metabolic process, feeding it with NADP+ or something of the sort. I'm not sure how you'd make the NADP+.