Rentech (RDC) announced today that it would purchase Royster-Clark Nitrogen of East Dubuqe, IL, a fertilizer producer, and convert the existing natural gas-fed plant to coal-fed gasification plant. The conversion calls for two gasification trains and a spare, standby gasifier, to process 5,200 tons per day of coal. The conversion will increase the capacity of the plant from 830 tons per day to 900 tons per day of nitrogen (in the form of ammonia) as well as producing 87 million gallons per year of Fischer-Tropsch (FT) liquid fuels and a surplus of electricity.