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High removal of thiophene from model gasoline by porous MIL-101(Cr)/SA hybrid membrane

机译：通过多孔MIL-101（CR）/ SA杂交膜从模型汽油中高除噻吩

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摘要

Membrane separation technologies have great promising potential for applications in several industries. Metal-organic frameworks (MOFs), for their large surface areas, low framework densities, transition-metal ions in the skeleton and high pore volumes relative to other porous matrices, have great potential for the removal of sulfur from gasoline with high efficiency. In the present study, a novel porous membrane adsorbent MIL-101(Cr)/SA was prepared by immobilizing MIL-101(Cr) onto sodium alginate (SA) matrix, which can combine the size/shape selectivity of MIL-101(Cr) with the processability and mechanical stability of SA polymer. The physico-chemical properties of MIL-101(Cr)/SA were investigated by FT-IR, SEM, BET, XRD and EDX methods. To investigate the effects of some important factors on the adsorption behavior for thiophene, a batch of experiments were performed by changing the concentration of porogen polyethylene glycol in the MIL-101(Cr)/SA, solution temperature, initial thiophene concentration and contact time. Meanwhile, benzothiophene, thiophene and 3-methyl thiophene were used to test the selectivity of MIL-101(Cr)/SA. The MIL-101(Cr)/SA showed an excellent uptake capacity of 671 mg g(-1) under the optimal adsorption conditions. Selectivity testing indicated that the uptake capacity of MIL-101(Cr)/SA follows the order of benzothiophene thiophene 3-methyl thiophene. Kinetics experiments indicated the pseudo-second-order model displayed good correlation with adsorption kinetics data. The Crank model showed that the intraparticle solute diffusion is the rate-controlling adsorption step. Regeneration experiment result shows that the prepared MIL-101(Cr)/SA has excellent adsorption and desorption efficiencies.
机译：膜分离技术对若干行业的应用具有很大的有希望的潜力。金属有机框架（MOFS），对于它们的大表面积，低框架密度，骨架中的过渡金属离子相对于其他多孔基质具有高孔径，具有高效率的含量从汽油中除去硫的潜力很大。在本研究中，通过将MIL-101（Cr）固定到藻酸钠（SA）基质上来制备新型多孔膜吸附剂MIL-101（Cr）/ se，这可以组合MIL-101的尺寸/形状选择性（Cr ）具有SA聚合物的可加工性和机械稳定性。通过FT-IR，SEM，BET，XRD和EDX方法研究了MIL-101（CR）/ SA的物理化学性质。为了探讨一些重要因素对噻吩的吸附行为的影响，通过在MIL-101（Cr）/ SA中的致孔聚乙二醇，溶液温度，初始噻吩浓度和接触时间来进行一批实验。同时，使用苯并噻吩，噻吩和3-甲基噻吩来测试MIL-101（Cr）/ sa的选择性。 MIL-101（CR）/ SA在最佳吸附条件下显示出671mg（-1）的优异摄取容量。选择性测试表明MIL-101（CR）/ SA的摄取容量遵循苯并噻吩和GT的顺序。噻吩＆ 3-甲基噻吩。动力学实验表明，伪二阶模型与吸附动力学数据显示出良好的相关性。曲柄模型表明，粒前溶质扩散是控制速率控制吸附步骤。再生实验结果表明，制备的MIL-101（CR）/ SA具有优异的吸附和解吸效率。

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  • 来源
    《RSC Advances》 |2018年第71期|共9页
  • 作者

    Wu Wen Bing; Xue Sun; Chen Jian Hua; Li Xiao;

  • 作者单位

    Fuzhou Univ Sch Chem Engn Fuzhou 350108 Fujian Peoples R China;

    Fuzhou Univ Sch Chem Engn Fuzhou 350108 Fujian Peoples R China;

    Minnan Normal Univ Coll Chem Chem Engn &

    Environm Zhangzhou 363000 Peoples R China;

    Fuzhou Univ Sch Chem Engn Fuzhou 350108 Fujian Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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