Desulphurisation of dibenzothiophene and 4,6–dimethyl dibenzothiophene via enhanced hydrogenation reaction route using RePd–TiO2/SiO2 aerogel catalysts: kinetic parameters estimation and modelling
نویسندگان
چکیده
Re/Pd-TiO2/SiO2 aerogel catalysts were synthesized by using a sol-gel method and supercritical drying in excess solvent investigated the reaction of hydrodesulphurisation (HDS) dibenzothiophene (DBT) 4,6-dimethyl (4,6-DMDBT). Both Re/Pd catalysts, obtained with without use mesitylene synthesis step, have shown increased conversions up to 70 % desulphurization 4,6-DMDBT, when compared conventional Co/Mo hydroprocessing catalysts. This observation is importance for conversion highly refractory 4,6-DMDBT produce ultra-low sulphur diesel fuels, ULSD. In order quantify extent desulphurisation, which proceeds via hydrogenation route, DBT along evolution products characteristic direct desulphurisation route monitored gas chromatography?mass spectrometry (GC-MS) analytical technique. The was performed at 630 K 6 MPa batch catalytic reactor. experimental results used Hougen-Watson kinetic model describing on ? active sites. Kinetic parameters this complex kinetics determined Genetic Algorithm minimum deviation function. Values calculated values ratio 3-methylcyclohexyltoluene (MCHT dimethyl biphenyl (DMBPH) expressed as MCHT/(MCHT+DMBPH) ranging between 0.66 0.94, confirmed that dominant 4,6-DMDBT.
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ژورنال
عنوان ژورنال: Hemijska Industrija
سال: 2022
ISSN: ['2217-7426', '0367-598X']
DOI: https://doi.org/10.2298/hemind220114008p