Desulfurization of Gasoline using Molecularly Imprinted Chitosan as Selective Adsorbents |
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Authors: | Yonghui Chang Lei Zhang Hanjie Ying Zhenjiang Li Hao Lv and Pingkai Ouyang |
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Institution: | (1) State Key Laboratory of Materials-Oriented Chemical Engineering, College of Life Science and Pharmaceutical Engineering, NanJing University of Technology, Nanjing, 210009, People’s Republic of China; |
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Abstract: | For desulfurization of gasoline, novel chitosan-based molecularly imprinted polymer (MIP) was prepared by cross-linking chitosan
with epichlorohydrin in the presence of dibenzothiophene (DBT) as the template. The influence of cross-linking ratio on the
specific adsorption was evaluated. The effects of the types and the amounts of porogen on selectivity of the chitosan MIP
were also examined. Results showed that MIP has a higher recognition property to DBT. The maximum rebinding capacities of
the MIP reached 22.69 mg g−1 in the model solution. The adsorption behaviors of the MIP including adsorption kinetics, isotherms, and thermodynamic parameters
were investigated and the experimental data agreed well with the Langmuir model. The dynamical adsorption behaved in first-order
kinetics. Negative values for the Gibbs free energy showed that the adsorptions were spontaneous processes. The MIP was further
used to selectively adsorb organosulfur from gasoline. |
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Keywords: | |
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