Abstract
The sulfur specification for diesel fuel has been tightened exponentially over the years. In this manuscript, the unsupported Ni-Mo (-W) sulfide hydrotreating catalysts were prepared to produce the clean diesel fuel with ultra-low sulfur, nitrogen, and aromatics contents. The X-ray Diffraction (XRD), Low Temperature N2Adsorption (BET method), and High Resolution Transmission Electron Microscope (HRTEM) were applied to characterize the as-prepared catalysts. The characterization results indicate that the unsupported Ni-Mo (-W) hydrotreating catalyst have high specific surface area, large pore volume, high MoS2or WS2stacking layers, and large MoS2or WS2crystal length. The catalysts were evaluated in the micro-reactor using FCC diesel fuel as the raw material. The evaluation results reveal that the unsupported Ni-Mo (-W) catalysts have excellent hydrogenation performance. Utilizing the unsupported Ni-Mo (-W) sulfide catalysts is an efficient method to produce clean diesel fuel. Keywords: clean fuel; Ni-Mo (-W) sulfide; catalyst; hydrogenation
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