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- W2043293541 abstract "A series of MCM-41 supports modified with phosphorus (0–5 wt.% P2O5) and their respective NiMo catalysts were prepared and characterized by N2 physisorption, XRD, ammonia TPD, temperature programmed reduction (TPR), UV–vis diffuse reflectance spectroscopy (DRS), chemical analysis and HRTEM. It was shown that phosphorus insertion in the siliceous MCM-41 causes a deterioration of the textural characteristics and some loss in the periodicity of the MCM-41 pore structure. However, the acidity of MCM-41 material increases with P loading. XRD, DRS, TPR and HRTEM show that the characteristics of oxide and sulfided Mo and Ni species change with P incorporation in the MCM-41 support. Hydrodesulfurization (HDS) of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) was used to evaluate the activity of the prepared catalysts. It was shown that the modification of MCM-41 with phosphorus results in high-performance NiMo catalysts especially for HDS of the most refractory dibenzothiophenes, such as 4,6-DMDBT. Catalysts of NiMo/P-MCM-41 series showed higher catalytic activity in 4,6-DMDBT HDS than the reference NiMo/Al2O3 counterpart. Maximum catalytic activity in this case was observed for the catalyst supported on MCM-41 with 1 wt.% P2O5. Reaction product analysis shows that phosphorus addition promotes hydrogenation pathway of HDS." @default.
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- W2043293541 date "2005-09-01" @default.
- W2043293541 modified "2023-10-16" @default.
- W2043293541 title "New hydrotreating NiMo catalysts supported on MCM-41 modified with phosphorus" @default.
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- W2043293541 doi "https://doi.org/10.1016/j.micromeso.2005.05.010" @default.
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