Do you have a "per barrel" estimate of the cost of this process?
Assessing a Coal-to-Liquids Fuel Industry in the United States
http://www.rand.org/pubs/research_briefs/RB9342/index1.html
... the technology for converting coal to liquid fuel already exists, and production costs from initial facilities appear competitive at world oil prices in the range of $55 to $70 per barrel.