Membrane Material HEC for FCC Gasoline Desulphurization by Pervaporation

In order to further improve the desulphurization capability of hydroxyethyl cellulose(HEC) membrane,5 kinds of HEC with different molecular weight were modified through the crosslink.The effect of molecular weight and crosslinking agent on the desulphurization properties of HEC membrane was studied.The results show that the HEC with an inherent viscosity of 122 mL/g is suitable to use for FCC desulphurization.Next,the desulphurization properties of HEC membrane vary with the crosslinking agent type.The obtained membrane was used for pervaporation test.It is found that enrichment factor first increases and then decreases with the increasing operating temperature and has a maximum at so called optimal desulphurization temperature.The optimal desulphurization temperature depends on feed type.