Bench Scale Development of the TRW Process for Cleaning Coal (Gravimelt Process). Quarterly Technical Progress Report, August-October 1984

摘要

Important progress has been made in all of the mojor process unit operations of the Gravimelt Process. Beginning with data that shows that molten caustic size reduces (comminuates) 3/8'' top size coal to a size giving excellent desulfurization and demineralization rates, including material balance results for operation of the 20 lb/hr leacher on Kentucky No. 11 coal and also including countercurrent molten caustic washing at the 20 lb/hr rate of Gravimelt reacted coal resulting in a product Pittsburgh No. 8 coal which is similar in ash and sulfur to a No. 2 fuel oil. In addition, laboratory scale demonstration of caustic regeneration by two different routes has been accomplished. An additional coal for the program was received from the Ames Laboratory which has high organic sulfur. This coal was tested at laboratory scale, to provide information prior to testing at bench scale, in which it is shown that this coal can be reduced in sulfur content to a value 1/3 lower than required by the New Source Performance Standards and the ash can be reduced to below 0.1%. 2 figures, 11 tables. (ERA citation 10:010842)