Abstract
Publisher Summary This chapter discusses ultra fine metal sulfide particles, which are synthesized by two different methods and the catalytic activity of the metal sulfide particles. The activation of metal surface molybdenum, cobalt, nickel, and iron (Mo, Co, Ni, Fe) by mechanical vibration is quite small. Fine particles of metal sulfide are produced by this method. Hydrogenation activity of these ultra fine metal particles per weight is as follows: Co > Ni > Fe. The structure of sulfided Co was Co 9 S 8 , but that of sulfided Ni is a mixture of Ni x S y (x>y). The synergy effect of Fe and Co in case of alloy of Fe and Co is not found. These catalysts are now applied for the liquefaction of wandoan coal.
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