| 摘要: |
| 采用常温常压吸附法考察了各种分子筛吸附剂对模型溶液中二甲基二硫醚(DMDS)的吸附脱除性能。吸附活性结果表明,由于MTBE的强竞争吸附作用,仅ZSM-5分子筛可以从MTBE选择性吸附脱除DMDS,而其他分子筛均完全没有效果。ZSM-5所特有的十元环孔道是选择性吸附的关键。通过一系列过渡金属改性,结果显示,仅银离子改性吸附剂硫容上升。在模拟油中硫容从未改性的13.4 mg/g提高到35.4 mg/g。通过热重分析发现,S-M键的形成是选择性吸附脱硫的关键。 |
| 关键词: 竞争吸附 甲基叔丁基醚 二甲基二硫醚 ZSM-5 吸附脱硫 |
| DOI：10.3969/j.issn.1007-3426.2015.06.004 |
| 分类号:TE624.9 |
| 基金项目:国家自然科学基金“反应吸附脱硫中Ni/ZnO体系中的自再生动力学及噻吩与烯烃竞争吸附机理研究”(21276086)。 |
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| Study on selective adsorption desulfurization of MTBE |
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Lu Yannan, Shi Li, Meng Xuan
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(Petroleum Processing Research Center, East China University of Science and Technology, Shanghai 200237, China)
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| Abstract: |
| The adsorption removal performance of DMDS from MTBE solution with various zeolites under the room conditions was studied. The results showed only ZSM-5 exhibited an excellent performance to remove DMDS from MTBE selectively for the strong competitive adsorption of MTBE, and yet other zeolites showed totally futile. The shape-selectivity should be responsible for the selective adsorption of ZSM-5. Effect of modification by transition metals loaded on ZSM-5 was studied. Only the adsorbent with Ag+ loading showed a positively enhanced capacity of selective sulfur adsorption among all adsorbents studied. The sulfur capacity was increased from 13.4 mg/g to 35.4 mg/g adsorbent in the simulation MTBE solution after modification by Ag+. TGA-DSC analysis demonstrated the adsorption on the adsorbent occurred significantly via S-M bonds. |
| Key words: competitive adsorption MTBE DMDS ZSM-5 adsorption desulfurization |
