Abstract
Highly loaded iron phosphides were prepared by the phosphidation of unsupported Fe, 80%Fe/C and 60%Fe/C with Fe metal particle sizes of 38, 35 and 29nm, respectively, using triphenylphosphine in liquid phase. The large Fe particles such as those in the unsupported sample could not be phosphided completely, while the smaller ones in the 60%Fe/C could be completely phosphided into Fe2P at 543K for 18h and FeP at 593K for 33h, respectively. The FeP/C was found to be significantly more stable and thus generally more active than the Fe2P/C for the hydrotreating reactions.
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