Abstract
Three nanoscale iron-based catalyst precursors were tested to determine their effect on the conversion of a subbituminous coal. The results of this study indicate that each of the precursors, superfine iron oxide, Fe 7 C 3 , and Fe 1−x S, exhibited very similar activity and selectivity with only minor variations. However, the hydrogenation activities of the three catalysts were very different. This was related to the particle size and surface area of the precursor, rather than its phase. The insensitivity to phase was probably due to the rapid transformation of the precursor surface, where the catalytic reaction occurs, to a similar structure in each case
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