Abstract
The hydrodenitrogenation (HDN) of carbazole over bulk Ni x MoP (0 ≤ x ≤ 1.1) catalysts is reported at 583 K and 3.0 MPa H 2. X-ray diffraction (XRD) revealed the presence of NiMoP and MoP in the Ni x MoP catalysts. The Ni x MoP had higher CO uptake, higher acidity and lower TOFs for the HDN of carbazole than MoP. However, the selectivity to bicylohexane (BCHX) was greater on the Ni x MoP catalysts compared to MoP, and the Ni 0.07MoP had the highest BCHX selectivity and highest TOF among the Ni x MoP catalysts. The improved selectivity is attributed to the enhanced CO uptake and acidity that resulted in increased hydrogenation of carbazole to terahydrocarbazole which in turn readily undergoes C N bond cleavage on acid sites to produce BCHX.
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