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Abstract: A novel double-template molecularly imprinted polymer (D-MIP) on the surface of carbon microspheres (CMSs), using benzothiophene (BT) and dibenzothiophene (DBT) as the template molecules, was prepared for the removal of benzothiophene sulfides from fuel gasoline. Field emission scanning electron microscopy and Fourier Transformation Infrared Spectrometry were used to characterize the morphology and structure of the D-MIP/CMSs. The adsorption behaviors of the D-MIP/CMSs including adsorption kinetics, isotherms, selectivity and regeneration were detected in detail by gas chromatography. The D-MIP/CMSs exhibited excellent selectivity toward BT and DBT with higher binding capacity in simulated gasoline compared to non-imprinted polymer (D-NIP/CMSs). The adsorption equilibrium of D-MIP/CMSs was achieved within 90 min and the adsorption capacity reached 57.16 (BT) and 67.19 mg g-1 (DBT), respectively. The pseudo-second order model and LangmuirGÇôFreundlich isotherm described the adsorption of benzothiophene sulfides on the D-MIP/CMSs well. The D-MIP/CMSs could be used 10 times without significant loss in adsorption capacity. In addition, the D-MIP/CMSs exhibited good desulfurization effect in real oil. The D-MIP/CMSs provides a new material for deep desulfurization of fuel oils
Template and target information: dual templates, benzothiophene, BT, dibenzothiophene, DBT
Author keywords: Carbon microspheres, surface molecularly imprinted polymer, benzothiophene, dibenzothiophene, Desulfurization