Without attempting linkage to any of our prior reports concerning the fact, we see herein that Phillips Petroleum again confirms that several known and established processes can be combined to synthesize a hydrocarbon fuel, in this case, and perhaps importantly, Methane, by recycling and reacting Carbon Dioxide, from whatever source, with hot Coal, to form Carbon Monoxide; and, then, reacting that Carbon Monoxide with Steam to form a hydrocarbon gas consisting primarily of Methane.
Such rather direct synthesis of Methane, in a process that, as a first step, recycles Carbon Dioxide through reactions with Coal, offers additional Carbon Dioxide recycling potentials, as well, as we emphasize, following excerpts from the link to: