Diesel is not made from Coal
Clean Diesel from Coal
http://www.technologyreview.com/news/405676/clean-diesel-from-coal/
Synthetic diesel fuel from coal
http://www.energyandclimate.org/synthetic-diesel.html
Gasoline alternative: Synthetic diesel heralds a new era for coal
http://www.ft.com/intl/cms/s/0/780377ac-1dd2-11e2-8e1d-00144feabdc0.html
It is not a new process. Germany did it to supplement fuel supplies back during WW2.
Diesel Production from Fischer−Tropsch: The Past, the Present, and New Concepts
http://pubs.acs.org/doi/abs/10.1021/ef900064c