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首页> 外文期刊>RSC Advances >Mesoporous TiO2-SiO2 adsorbent for ultra-deep desulfurization of organic-S at room temperature and atmospheric pressure
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Mesoporous TiO2-SiO2 adsorbent for ultra-deep desulfurization of organic-S at room temperature and atmospheric pressure

机译：中孔TiO2-SiO 2吸附剂，用于在室温和大气压下的有机-S的超深脱硫

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摘要

Ultra-deep desulfurization is a major requirement for upgrading the quality of fuel and power sources for fuel-cells. A series of mesoporous TiO2-SiO2 adsorbents were prepared and investigated for ultra-deep adsorption of benzothiophene (BT) and dibenzothiophene (DBT) from model fuel at ambient conditions. The adsorbents were characterized via SEM, XRD, N-2-BET, FT-IR and NH3-TPD techniques. The results revealed that the adsorbent containing 40 wt% silica achieved the desulfurization efficiency higher than 99% when the initial sulfur concentration in the model fuel was 550 ppm. The high desulfurization performance of the adsorbent was attributed to its large specific surface and surface acidity. It also achieved a high sulfur adsorption capacity of 7.1 mg g(-1) in a fixed-bed test, while its static saturated sulfur capacity was 13.7 mg g(-1). The order of selectivity towards the adsorption of different organic sulfurs was DBT BT&DBT BT. The kinetics of the adsorption of organic sulfur was studied and the results indicated that the pseudo-second order model appropriately fitted the kinetics data. Furthermore, the used adsorbent can be easily regenerated and the desulphurization efficiency of the recovered adsorbent after five regeneration cycles was still maintained at 94.5%.
机译：超深脱硫是提升燃料电池燃料和电源质量的主要要求。制备了一系列介孔TiO2-SiO 2吸附剂，并研究了在环境条件下的模型燃料中的苯并噻吩（BT）和二苯胺酚（DBT）的超深吸吸附。通过SEM，XRD，N-2-BET，FT-IR和NH3-TPD技术表征吸附剂。结果表明，当模型燃料中的初始硫浓度为550ppm时，含有40wt％二氧化硅的吸附剂达到了高于99％的脱硫效率。吸附剂的高脱硫性能归因于其大的比表面和表面酸度。它还在固定床试验中实现了7.1mg G（-1）的高硫吸附容量，而其静态饱和硫容量为13.7mg（-1）。对不同有机硫的吸附的选择性顺序是DBT＆ BT＆DBT＆GT; BT。研究了有机硫吸附的动力学，结果表明，伪二次阶模型适当地安装了动力学数据。此外，可以容易地再生使用的吸附剂，并且在五个再生循环后回收的吸附剂的脱硫效率仍保持在94.5％。

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  • 来源
    《RSC Advances》 |2018年第14期|共9页
  • 作者

    Qin Bin; Shen Yuesong; Xu Boyang; Zhu Shemin; Li Peiwen; Liu Youlin;

  • 作者单位

    Nanjing Tech Univ Coll Mat Sci &

    Engn 5 Xinmofan Rd Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Mat Sci &

    Engn 5 Xinmofan Rd Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Mat Sci &

    Engn 5 Xinmofan Rd Nanjing 210009 Jiangsu Peoples R China;

    Nanjing Tech Univ Coll Mat Sci &

    Engn 5 Xinmofan Rd Nanjing 210009 Jiangsu Peoples R China;

    Univ Arizona Dept Aerosp &

    Mech Engn Tucson AZ 85721 USA;

    Nanjing Tech Univ Coll Mat Sci &

    Engn 5 Xinmofan Rd Nanjing 210009 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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