Abstract
Mae Moh coal of Lampang province, northern Thailand, was desulfurized by leaching with organometallic compounds. Most of the inorganic sulfur and some organic sulfur were removed. The effect of process conditions (temperature, time and particle size) on the degree of desulfurization was studied and optimum conditions were established. It is shown that sodium benzoxide can leach ∼ 68% of pyritic sulfur and ∼ 33% of organic sulfur. The kinetics of pyritic sulfur reaction was investigated. The kinetic data are well described by the shrinking-core model, indicating that the pyritic sulfur reaction was predominantly diffusion-controlled. The organic sulfur reaction is zero-order with respect to organic sulfur.
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