Large-ring aromatic sulfur compounds, e.g., benzothiophene (BT), dibenzothiophene (DBT), present in petroleum and liquid fuels are harmful to human health and the environment. These compounds cause acid rain due to SO2 formation upon combustion of liquid fossil fuels. We studied the use of Metal Organic Frameworks (MOFs), e.g., Cu-MOF Basolite C300, to remove aromatic sulfur compounds from model liquid fossil fuels in a selective way and in a non-destructive fashion.