jagdish wrote:
Acetylene will have to be further processed to liquid fuels.
The products of most coal production processes have to go through multiple steps to produce useful product - especially ones that can conform to increasingly tight (for environmental and other reasons) product specifications.
Syngas processes are notoriously expensive to get working - there is a reason the Pearl GTL plant using the middle distillate process cost tens of billions of dollars, and that was without coal gassifiers and ash gassifier plant that will further increase the cost.
(It uses partial oxidation of methane to produce its syngas, which is not feasible with coal as it would not contain enough hydrogen)
Acetylene-to-valuable products technology is well developed, after all prior to the 60s coal (and to a large extent) acetylene was the major route to industrial chemicals.