Improvement of Heavy Oil Hydrodesulfurization Catalyst Support Properties by Acetic Acid Treatment

Document Type: Research Article


Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, I.R. IRAN


A specific type of mesopore extrudates gamma alumina was prepared; which is applied as the catalyst in the heavy oil hydrodesulfurization unit. Extrudates gamma alumina has been devised the boehmite powder; several samples have been utilized to investigate the concentration and the number of acetic acid treatment effects on the textural properties. Textural properties of catalyst support have been characterized by X-Ray Diffraction, N2-adsorption/desorption techniques, the best results were observed at 25% acetic acid after three times treatments. The active metals (3.71%Molybdenium &1.43%Nickle) have been impregnated on the catalyst support. The prepared catalyst determined by X-Ray Fluorescence, N2- adsorption/desorption, bench-scale reactor test, NH3-Temperature Programmed Desorption and Radial Strength techniques.


Main Subjects

[1] Ancheyta J., “Catalyst, Deactivation of Heavy Oil Hydroprocessing Catalyst”, John Wiley & Sons, Inc., Hoboken, New Jersey, (2016).
[2] Rashidzadeh M., Peyrovi M.H., Mondegarian R., Alumina-Based Supports for Automotive Palladium Catalysts, React. Kinet. Catal. Lett., 69: 115-122 (2000).
[5] Park H., Yang S. H., Jun Y. S., Hong W. H., Kang J. K., Facile Route to Synthesize Large-Mesoporous γ-Alumina by Room Temperature Ionic Liquids, Chem. Mater., 19: 535-542 (2007).
[7]StanislausA., Al-Dolama K., Absi-Halabi M., Preparation of a Large Pore Alumina-Based HDM Catalyst by Hydrothermal Treatment and Studies on Pore Enlargement Mechanism, Journal of Molecular Catalysis A: Chemical, 181: 33-39 (2002).
[8] Peyrovi M.H., Hamoule T., Study of Catalytic Properties of Pt/Al-HMS Catalysts in n-heptane Hydroisomerization, Kinet. Mech. Cat., 106: 233-243 (2012).
[9] Speight J.G., “Introduction of Handbook of Refinery Desulfurization”, Handbook of Refinery Desulfurization, CD & W, Inc. Laramie, Wyoming, (2016).
[10] Kabe T., Aoyama Y., Ishihara  D.  Wang, A., Qian W.H, Hosoya M, Effects of H2S on hydrodesulfurization of Dibenzothiophene and 4,6-Dimethyldibenzothiophene on Alumina-Supported NiMo and NiW Catalysts, Q. Appl. Catal. A, 209: 237-247 (2001).
[11] Liu Y., Jia L., Hou B., Li D., Preparation and Characterization of Transitional Alumina Obtained Through Ammonia Treatment, Bulletin of the Korean Chemical Society, 36: 2851-2861 (2015).
[12] Armor J. N., Carlson E. J., Variables in the Synthesis of Unusually High Pore Volume Aluminas, J. Mater. Sci., 22: 2549-2556(1987).
[13] Li Z. T., Liu D. M., Cai Y. D., Yao Y. B., Wang H., Pore Structure and Compressibility of Coal Matrix with Elevated Temperatures by Mercury Intrusion Porosimetry, Energy Explor. Exploit, 33:809-826 (2015).
[14] Parida K. M., Pradhan A. C., Sahu J. Das, N., Synthesis and Characterization of Nano-Sized Porous Gamma-Alumina by Control Precipitation method, Mater. Chem. Phys., 113: 244-248 (2009).
[15] Aguado J. A., Escola J. M., Influence of the Thermal Treatment upon the Textural Properties of Sol–Gel Mesoporous γ-Alumina Synthesized with Cationic Surfactants, Microporous and Mesoporous Materials, 128: 48-55 (2010).
[16] Choi J., Yoo K.S., Kim S.D., Park H.K., Nam C.W., Kim J., Synthesis of Mesoporous Spherical γ-Al2O3 Particles with Varying Porosity by Spray Pyrolysis of Commercial Boehmite, Journal of Industrial and Engineering Chemistry, 56: 151-156 (2017).
[17] Absi-Halabi M., Stanislaus A., Al-Zaid H., Effect of Acidic and Basic Vapors on Pore Size Distribution of Alumina under Hydrothermal Conditions, Applied Catalysis A: General, 101: 117-128 (1993).
[18] Xu J., Ibrahim A.R., Hong Y., Su Y., Wang H., Li J., Preparation of Large Pore Volume γ-Alumina and Its Performance as Catalyst Support in Phenol Hydroxylation, Microporous and Mesoporous Materials, 231: 1-10 (2016).