Development of Kinetic and Process Models for the Oxidative Desulfurization of Light Fuel, Using Experiments and the Parameter Estimation Technique

YesThe oxidative desulphurization (ODS) of light gas oil (LGO) is investigated with an in-house designed cobalt 11 oxide loaded on alumina (γ-Al2O3) catalyst in the presence of air as oxidizing agent under moderate operating 12 conditions (temperature from 403 to 473 K, LHSV from 1 to 3 hr-1, initial concentration from 500 to 1000 13 ppm). Incipient Wetness Impregnation method (IWI) of cobalt oxide over gamma alumina (2% Co3O4/γ-14 Al2O3) is used for the preparation of the catalyst. The optimal design of experiments is studied to evaluate the 15 effects of a number of process variables namely temperature, liquid hourly space velocity (LHSV) and 16 concentration of dibenzothiophene and their optimal values were found to be 473 K, 1hr-1 and 1000 ppm 17 respectively. For conversion dibenzothiophene to sulphone and sulphoxide, the results indicates that the 18 Incipient Wetness Impregnation (IWI) is suitable to prepare this type of the catalyst. Based on the 19 experiments, mathematical models that represent a three phase reactor for describing the behavior of the ODS 20 process are developed. 21 In order to develop a useful model for simulation, control, design and scale-up of the oxidation process, 22 accurate evaluation of important process parameters such as reaction rate parameters is absolutely essential. 23 For this purpose, the parameter estimation technique available in gPROMS (general Process Modelling 24 System) software is employed in this work. With the estimated process parameters further simulations of the 25 process is carried out and the concentration profiles of dibenzothiophene within the reactor are generated

Batch oxidative desulfurization of model light gasoil over bimetallic nanocatalyst

This work explored the design and synthesis of a novel AgO/ZnO/HY-Zeolite bimetallic nanocatalyst by an impregnation method. The purpose of this nanocatalyst was to remove the dibenzothiophene as the primary sulfur content from a light gasoil model via a catalytic oxidative desulfurization process (ODS). The characteristics of the synthesized nanocatalyst were determined by FTIR, BET, SEM, and XRD. The synthesized nanocatalyst indicated an area of 252 m2g–1, pore volume and pore size equal to 0.221 cm3g–1 and 2.15 Ao, respectively. The ODS results revealed better sulfur conversion i.e. 91.8% conversion efficiency at optimal ODS reaction conditions. The results also indicated very good reusability of the synthesized catalyst after recycling five times