Spent cobalt-based macroporous adsorbents are considered to be used for the hydrotreating process. Herein, spent materials from low-temperature desulfurization process were as organic sulfur catalysts. Physicochemical properties of waste characterized and performance COS conversion was evaluated at different conditions. The Co-containing exhibit considerable hydrogenation low temperature, resid...

Cobalt molybdenum catalysts supported on novel activated carbon-HZSM-5 composites with different mass ratios were prepared by wet-impregnation method and pre-sulfided CS2. Characterization of these was done using X-ray powder diffraction, Fourier transform infrared spectroscopy, N2 adsorption-desorption, scanning electron microscope analytics. Their activity for the hydrodesulfurization reactio...

Millions of tons of vacuum residues are produced in refineries every year and could be a potentially valuable resource for generating electricity and has possible application as heating and marine fuel. In this work, the polycyclic aromatic sulfur compounds (PASHs) from the aromatic fraction of vacuum residue before and after partial hydrodesulfurization (HDS) were derivatized by methylation to...

Desulfurization of a commercial diesel fuel by different adsorbents was studied in a fixed-bed adsorber operated at ambient temperature and pressure. In general, the adsorbents tested for total sulfur adsorption capacity at breakthrough followed the order: AC/Cu(I)-Y Cu(I)-Y Selexsorb CDX (alumina) CuCl/ -Al2O3 activated carbon Cu(I)-ZSM-5. The best adsorbent, AC/Cu(I)-Y (layered bed of 15 wt %...

While sulfur is often described as a catalyst poison, many of nature s most remarkable enzymes feature metals embedded in a sulfur-rich coordination sphere. This is especially true for the biological processing of dihydrogen, dinitrogen, and carbon monoxide.[1±3] In the industrial sector, metal sulfides are used to activate H2 in the hydrodesulfurization (HDS) process.[4, 5] Inspired by these p...

Abstract In the present study, catalytic systems based on La-doping were developed to improve activity and performance of CoMoS2 hydrodesulfurization catalysts. Lanthanum-doped at 5, 10, or 25% Co content in catalysts synthesized through a solvothermal process. X-ray diffraction (XRD) photoelectron spectroscopy (XPS) analyses confirmed triphasic consisting Co9S8, MoS2, La2S3. The La doped showe...