Leaching of Pyrite from Coal in a Trickle-bed Reactor.
Proc 9th Int'l Pgh Coal Conf 1992 Oct; :6 pages
The U.S. Bureau of Mines used a large countercurrent trickle-bed column reactor to obtain data on the chemical and transport processes controlling the leaching of pyrite from coal and coal waste. There was apparent correlation between sulfate production and hydrocarbon desorption, in contrast to what had been previously observed in leaching experiments using coal preparation plant waste. Experimental data were used in the formulation of a theoretical absorption-desorption model of solids leaching that describes the rate-constraining intraparticle diffusion transport properties of this system.
Proc. 9th Int'l Pgh Coal Conf., Oct., 1992; Univ. of Pittsburgh, PP. 247-252