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Supported silver adsorbents for selective removal of sulfur species from hydrocarbon fuels

机译：负载型银吸附剂，用于从烃类燃料中选择性去除硫

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摘要

Dispersed silver oxides on supports such as TiO_2, γ-Al_2O_3 and SiO_2 were observed to be effective desul-furizing agents for refined fuels at ambient conditions. TiO_2 was determined to be the most stable support for silver oxide. Ag (4 wt%)/TiO_2 demonstrated a saturation sulfur capacity of 6.3 mgS/g for JP5 fuel containing 1172 ppmw sulfur. This high affinity for sulfur translated to one sulfur heterocycle associated with every two surface Ag atoms in the sorbent even in the presence of a 160-fold excess of other aro-matics found in the fuel. A unique attribute of these sorbents was that they were thermally regenerable at 450 ℃ using air as a stripping medium over multiple cycles. Desulfurization characteristics also varied with fuel composition. Variation in desulfurization performance between JP5, JP8 and a light fraction JP5 were established and associated with the differences in sulfur composition of these fuels. The effects of surface area, porosity and crystal structure of the sorbent on sulfur capacity are also presented.
机译：观察到分散在载体上的氧化银，例如TiO_2，γ-Al_2O_3和SiO_2是在环境条件下用于精炼燃料的有效脱硫剂。 TiO_2被确定为最稳定的氧化银载体。 Ag（4 wt％）/ TiO_2对含1172 ppmw硫的JP5燃料显示的饱和硫容量为6.3 mgS / g。这种对硫的高亲和力甚至转化为与吸附剂中每两个表面Ag原子相关的一个硫杂环，即使存在燃料中发现的其他芳族化合物过量160倍时也是如此。这些吸附剂的独特之处在于它们可以在450℃下使用空气作为汽提介质在多个循环中进行热再生。脱硫特性也随燃料组成而变化。确定了JP5，JP8和轻质馏分JP5之间的脱硫性能差异，并与这些燃料的硫成分差异相关。还介绍了吸附剂的表面积，孔隙率和晶体结构对硫容量的影响。

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  • 来源
    《Fuel》 |2010年第11期|P.3218-3225|共8页
  • 作者

    Sachin Nair; Bruce J. Tatarchuk;

  • 作者单位

    Department of Chemical Engineering,Auburn University, Auburn, AL 36849, USA;

    rnDepartment of Chemical Engineering,Auburn University, Auburn, AL 36849, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    desulfurization; sulfur sorbent; oxygen chemisorption; refined fuels;

    机译：脱硫硫吸附剂氧化学吸附精炼燃料;

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