Journal
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
Volume -, Issue -, Pages -Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15567036.2020.1815903
Keywords
Hydrodenitrogenation; coal tar; nickel-molybdenum catalysts; transition metal sulfides; aluminum oxide
Funding
- Natural Science Foundation of China [21878243, 21606177, 21908176]
- Natural Science Basic Research Program of Shaanxi [2019JM-085]
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Ni-Mo/gamma-Al(2)O(3)catalysts with different Ni loadings were prepared. They were characterized by X-ray diffraction (XRD), N(2)adsorption, IR spectra of adsorbed pyridine (Py-IR), temperature-programmed desorption of ammonia (NH3-TPD), temperature-programmed reduction of H-2(H-2-TPR), and high resolution transmission electron microscopy (HRTEM). The hydrodenitrogenation (HDN) performance of catalysts for coal tar were evaluated. The best hydrodenitrogenation activity was observed on the catalysts with a Ni loading of 6.25 wt% and a Ni/(Ni+Mo) ratio of 0.4. Also, the methods of co-impregnation and sequence-impregnation were compared. The denitrification rate of co-impregnation catalyst NiMo-5-co (71.2%) was slightly lower than that of sequence-impregnation catalyst NiMo-5 (71.7%). Disparate product distribution was obtained on NiMo-5-co and NiMo-5. The dispersion of active components, the distribution of pore and acid on catalysts played an important role in HDN process of coal tar.
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