TY - JOUR AU - Al-Zeghayer, Y.S. AU - Jibril, B.Y. PY - 2006/12/01 Y2 - 2024/03/28 TI - Kinetics of Hydrodesulfurization of Dibenzothiophene on Sulfided Commercial Co-Mo/γ-Al2O3 Catalyst JF - The Journal of Engineering Research [TJER] JA - Jou. Eng. Res. VL - 3 IS - 1 SE - Articles DO - 10.24200/tjer.vol3iss1pp38-42 UR - https://journals.squ.edu.om/index.php/tjer/article/view/21 SP - 38-42 AB - <p class="p1">Kinetics of hydrodesulfurization of dibenzothiophene (DBT) has been studied on a commercial CoMo/<span class="s1"><strong>γ</strong></span>-Al<span class="s2">2</span>O<span class="s2">3 </span>catalyst at 633 - 683 K and 10 atm. A low DBT concentration typically obtained in hydrodesulfurization operations was used. Pseudo-first-order model was found to fit the experimental data for the consumption of DBT. The activation energy for the conversion of DBT was found to be 51.7 kcal/mol. Biphenyl (BP) and cyclohexylbenzene (CHB) were obtained as dominant products. For the reaction network, both parallel and parallel-sequential routes were explored. The latter was found to give a better description of the BP and CHB distributions. The ratio of BP to CHB depended on the reaction temperature. The values of activation energies of DBT hydrogenolysis to BP (E<span class="s2">BP</span>), DBT hydrogenation to CHB (E<span class="s2">CHB1</span>) and hydrogenation of BP to CHB (E<span class="s2">CHB2</span>) were found to be in a decreasing order of E<span class="s2">CHB2 </span>&gt; E<span class="s2">BP </span>&gt; E<span class="s2">CHB1</span>. The result suggests the presence of different catalytic sites leading to the two products on the catalysts.</p><p class="p2"> </p> ER -