Citation:
SONG Hua, ZHANG Fu-yong, XU Xiao-wei, SONG Hua-lin, LI Feng. Effect of Pr and Ce on the activity of Ni2P catalyst prepared by low temperature reduction in hydrodesulphurization[J]. Journal of Fuel Chemistry and Technology,
;2015, 43(9): 1128-1133.
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The Ni2P-L, Pr-Ni2P-L and Ce-Ni2P-L catalysts were prepared by thermal decomposition of hypophosphites and reduced at low temperature; they were characterized by X-ray diffraction (XRD), temperature programmed reduction with hydrogen (H2-TPR), nitrogen physisorption, CO adsorption, and X-ray photoelectron spectroscopy (XPS). The effect of the rare earth praseodymium (Pr) or cerium (Ce) elements on the activity of Ni2P-L catalyst in hydrodesulfurization (HDS) was investigated with dibenzothiophene (DBT) as a model compound. The results indicated that the addition of Pr and Ce can suppress the formation of Ni5P4 and other mixed crystal phases and then promote the formation of Ni2P phase. After adding the rare earth metals, the selectivity to BP over the Ni2P catalyst is enhanced greatly, though the total HDS activity is decreased slightly.
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