Effects of Aromatics, Diesel Additives, Nitrogen Compounds, and Moisture on Adsorptive Desulfurization of Diesel Fuel over Activated Carbon
Effects of Aromatics, Diesel Additives, Nitrogen Compounds, and Moisture on Adsorptive Desulfurization of Diesel Fuel over Activated Carbon
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DOI：
10.1021/ie202440t
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发表时间：
2012-02
影响因子：
4.2
通讯作者：
Jing Xiao;C. Song;Xiaoliang Ma;Zhong Li
中科院分区：
文献类型：
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作者：
Jing Xiao;C. Song;Xiaoliang Ma;Zhong Li
目前的研究关注的是为什么活性炭对模拟柴油硫化物具有良好的吸附作用，但对实际柴油却没有效果。在这项工作中，研究了芳烃，含氧燃料添加剂，氮化合物和实际柴油中存在的水分对活性炭吸附脱硫（ADS）的影响。多芳烃如菲对ADS的抑制作用显著，即使浓度低于1.0 wt %，而单芳烃如丁基苯，即使浓度高达10 wt %，作用也可以忽略不计。不同硫化合物在AC-WPH上的吸附主要是由于它们的共轭π电子与碳表面的相互作用，其中给电子甲基进一步增强了这种相互作用。微量的含氧柴油添加剂、氮化合物和水分都对AC-WPH吸附脱硫有抑制作用。
The present research is concerned with the question of why activated carbons that show good adsorption uptake for model diesel sulfur compounds are not effective for real diesel fuels. In this work, the effects of aromatics, O-containing fuel additives, nitrogen compounds, and moisture present in real diesel fuel on adsorption desulfurization (ADS) over a commercial activated carbon (AC-WPH) were investigated. Polyaromatics such as phenanthrene show a significant inhibiting effect on ADS, even at a concentration of less than 1.0 wt %, while monoaromatics such as butylbenzene, even up to 10 wt %, have a negligible effect. The adsorption of different sulfur compounds over AC-WPH can be attributed mainly to the interaction of their conjugated π electrons with the carbon surface, where the electron-donating methyl groups further enhance the interaction. Trace amounts of O-containing diesel additives, nitrogen compounds, and moisture all have inhibiting effects on adsorptive desulfurization over AC-WPH, which ...