Metal-Organic Frameworks (MOFs) constitute new class of functional materials with very high pore volume; they are studied for gas separation, storage, catalysis, sensing. Large-ring aromatic sulfur compounds benzothiophene (BT), dibenzothiophene (DBT), 4-methyldibenzothiophene (4-MDBT), 4,6-dimethyldibenzothiophene (4,6-DMDBT) are present in petroleum and liquid fuels, and cause air pollution, degradation of catalytic converters and fuel-reforming catalysts. We report kinetic studies of adsorption of BT, DBT, 4-MDBT and 4,6-DMDBT on Basolite C300 MOFs from fuel with n-C14H30 as solvent, and adsorption capacities at 25 and 75 �C. Adsorption of BT, DBT, 4-MDBT and 4,6-DMDBT proceeds without formation of molecular products, as found by RP-HPLC-UV. Sulfur uptake capacities follow the order: BT > DBT > 4-MDBT > 4,6-DMDBT, consistently with nanopores sizes in C300, and depend upon temperature. Kinetics of adsorption on timescale of hours is more complex than simple rate law, and shows preferential adsorption of aromatic sulfur compound or the solvent n-C14H30.

Adsorption of aromatic sulfur compounds on metal-organic frameworks

244th National Meeting (2012)

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