Hydrogenolysis and hydrogenation of dibenzothiophene catalyzed by sulfided CoO‐MoO3/γ‐Al2O3: The reaction kinetics

Broderick, D. H.; Gates, Bruce C.

doi:10.1002/aic.690270419

Cited by 166 publications

(97 citation statements)

References 17 publications

(14 reference statements)

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“…Due to the great importance of HDS units, different researchers have concentrated on various aspects of this process [5][6][7][8][9][10][11]. As kinetic and conversion determination studies, Feredous et al [5] studied the hydrodenitrogenation and hydrodesulfurization of heavy gasoil derived from bitumen by employing NiMo/Al 2 O 3 catalyst containing boron (B).…”

Section: Introductionmentioning

confidence: 99%

Analysis of sulfur removal in gasoil hydrodesulfurization process by application of response surface methodology

Abghari¹,

Shokri²,

Baloochi³

et al. 2010

Korean J. Chem. Eng.

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To investigate the efficiency of a Co-Mo catalyst in HDS process, a set of experiments were designed and carried out based on central composite design (CCD) methodology in an HDS pilot plant. The designed variables included temperature, LHSV and pressure. However, the hydrogen over fresh feed ratio remained constant. The ranges of these variables were, respectively, equal to 335-361 o C, 1.06-1.8 1/hr and 46.8-53.2 bar. The outcomes of experiments were employed to determine the coefficients of statistical models. For the clarification of the accuracy of the model, several statistical tests like ANOVA (Analysis of Variance), Lack-of-Fit test and residual squares were carried out. To optimize the operating conditions to achieve maximum sulfur removal, an optimization algorithm was employed. The outcomes revealed that the minimum sulfur content, which is 23.65 ppm in the final product, is attained at 355 o C, 1.2 1/ hr and 49.2 bar.

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Section: Introductionmentioning

confidence: 99%

Analysis of sulfur removal in gasoil hydrodesulfurization process by application of response surface methodology

Abghari¹,

Shokri²,

Baloochi³

et al. 2010

Korean J. Chem. Eng.

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“…A recent study has shown that at certain conditions, the DBT kinetic closely resembles that of an overall behavior of DBTs in a light oil fraction (Steiner, et al 2002) .…QÉOE »àjÈc …õØM πeÉY been reported. The reaction was shown to follow a pseudo-first-order kinetics and both parallel and consecutive reaction networks were identified (Girgis, et al 1991;Farag, et al 1997;Wang, et al 2004;Pille, et al 1994;Broderick, et al 1981). When the reaction of DBT was tested on CoMo/MCM-41, a pseudo-first-order kinetic model was found to represent the experimental data better than a Langmiur-Hinshelwood model.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Hydrodesulfurization of Dibenzothiophene on Sulfided Commercial Co-Mo/γ-Al2O3 Catalyst

Al-Zeghayer

Jibril

2006

Jou. Eng. Res.

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Kinetics of hydrodesulfurization of dibenzothiophene (DBT) has been studied on a commercial CoMo/γ-Al 2 O 3 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 BP ), DBT hydrogenation to CHB (E CHB1 ) and hydrogenation of BP to CHB (E CHB2 ) were found to be in a decreasing order of E CHB2 > E BP > E CHB1 . The result suggests the presence of different catalytic sites leading to the two products on the catalysts.

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“…In general, deep hydrodesulfurization of dibenzothiophenes over heterogeneous catalysts proceeds through two reaction pathways. One is hydrogenation (HYD) pathway, involving aromatic ring saturation and the other is a hydrogenolysis pathway via direct C-S bond cleavage, which is also called the direct desulfurization (DDS) pathway [34,35]. For production of clean fuels with low sulfur level, the effects of inhibitors, especially aromatic and nitrogen compounds, should be also considered and investigated.…”

Section: Subtask 31: Desulfurization and Denitrogenationmentioning

confidence: 99%

Refinery Integration of By-Products from Coal-Derived Jet Fuels

Rudnick¹,

Boehman²,

Chen³

et al. 2004

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This report summarizes the accomplishments toward project goals during the first twelve months of the project to assess the properties and performance of coal based products.These products are in the gasoline, diesel and fuel oil range and result from coal based jet fuel production from an Air Force funded program. Specific areas of progress include generation of coal based material that has been fractionated into the desired refinery cuts, acquisition and installation of a research gasoline engine, and modification of diesel engines for use in evaluating diesel produced in the project. The desulfurization of sulfur containing components of coal and petroleum is being studied so that effective conversion of blended coal and petroleum streams can be efficiently converted to useful refinery products. Equipment is now in place to begin fuel oil evaluations to assess the quality of coal based fuel oil. Coal samples have procured and are being assessed for cleaning prior to use in coking studies.

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Hydrogenolysis and hydrogenation of dibenzothiophene catalyzed by sulfided CoO‐MoO₃/γ‐Al₂O₃: The reaction kinetics

Abstract: P n = roots of Eq. 8 P = total pressure in system 9 = adsorbed-phase concentration expressed on an intra-9* = equilibrium value of 9 9", 9-= initial and final steady values of 9 9nr = saturation value of 9 in Langmuir equation 9 s = fractional coverage (39/ 9m)

Cited by 166 publications

References 17 publications

Analysis of sulfur removal in gasoil hydrodesulfurization process by application of response surface methodology

Analysis of sulfur removal in gasoil hydrodesulfurization process by application of response surface methodology

Kinetics of Hydrodesulfurization of Dibenzothiophene on Sulfided Commercial Co-Mo/γ-Al2O3 Catalyst

Refinery Integration of By-Products from Coal-Derived Jet Fuels

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