Abstract
Iron based catalysts have long been known to enhance the conversion in a direct coal liquefaction process. Attempts to increase the moderate activity of these catalysts have focussed on reducing particle size, enhancing and maintaining dispersion, and modifying the structure by addition of promoters. Sulfated hematites have been reported in the literature to exhibit significant activity for low rank coal liquefaction. The use of promoter metals such as molybdenum and tungsten has been shown to further enhance the catalytic effect. The superacidity of these particles has been suggested as a possible explanation for their high activity. The purpose of this study was to ascertain the effect of various promoter metals, both individually and in combinations on different types of reactions commonly associated with coal liquefaction.
Published Version
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