KVB Coal-Desulfurization Process Development. Final Technical Progress Report

摘要

This is the Final Technical Progress Report for the KVB Coal Desulfurization Process Development Project. The process involves oxidation of the sulfur in coal (both organic and pyritic) to soluble forms using nitrogen oxide gas mixtures and subsequent extractive removal. Bench scale oxidation tests were performed on four different coal types, all with appreciable organic sulfur contents. At the mild conditions (ambient temperature, atmospheric pressure, and near-stoichiometric gas loadings) originally envisioned for the process, sulfur removals in the range of 10 to 30% were obtained. At more severe conditions (primarily longer contact time and higher gas loadings), sulfur removals of 50 to 70% were obtained, but severe oxidation of the carbon structure of the coal occurred as well. Evidence exists that, even at low levels of total sulfur removal, some reaction of organic sulfur forms does occur. (ERA citation 07:003144)