Synthesis and Characterization of Unsupported Catalyst for Gas Oil Desulfurization

Abstract

Unsupported MoS2 catalysts were synthesized for the hydrodesulfurization (HDS) of real feed gas oil using different temperatures and pressures. Hydrothermal method was utilized to prepare by using molybdenum trioxide and sodium sulfide. The characterization of the catalyst was identified by XRD, SEM, and BET techniques. It was found that BET surface and pore volume were positively affected by pressure and temperature that could improve the activity of MoS2. Kinetic analysis showed that HDS reaction over MoS2 follow pseudo-first order kinetics. Experimental results revealed that the HDS activity of the unsupported MoS2 catalyst was better than supported CoMo/Al2O3 catalyst under the same operating conditions.

Preparation and Catalytic Activity of Co-Mo/γ-Al2O3 Catalyst for Hydro-desulfurization Reaction

“…Table 2 also shows the elemental practical analysis of the prepared CoMo/γ-Al2O3 catalyst where the percentage of the Mo active metal is 18.9 % that is fairly capable to handle the HDS reaction of the heavy naphtha. These findings are in conformance with previous published studies [14], [15].…”

“…For example, the sulphur removed (%) increased from 59 % at 523 ºK to 82 % at 598 ºK with the use of CoMo/γ-Al2O3 at LHSV = 3 hr -1 . The efficiency of the HDS reaction enhances with the increase of the reaction temperature since the higher temperature leads to enhance the internal molecular motion and reduce the free energy (kinetic energy) that required to compete the reaction Abid et al [14].…”