Department of Chemistry and Biochemistry, George Mason University, Fairfax, Virginia 22030, USA.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2011;46(2):176-80. doi: 10.1080/10934529.2011.532433.
The purpose of this investigation was to remove the organic nitrogen compounds from petroleum-derived diesel fuels. These nitrogen compounds can cause environmental problems, as well as fuel instability problems that can degrade fuels and affect engine performance. Fuels were treated with two different filtering media, activated clay and silica tel. The methylene chloride extracts from both the activated clay and silica gel were subjected to GC/MS analysis. Close to 99% of the total organic nitrogen compounds were removed. About 60% of the nitrogen compounds identified consisted of pyridines, quinolines and tetra-hydroquinolines made up 26%, while indoles and carbazoles about 10% of the total nitrogen compounds. Of the nitrogen heterocyclics identified, indoles and carbazoles were linked to fuel instability reactions. The proposed method was tested on diesels fuels from a variety of countries and found to remove between 97.8 and 99.9% of the N-compounds. The results of this study showed that both of these filtering materials were effective in removing the organic nitrogen compounds and resulted in fuels that exhibited excellent storage stability. These simple filtering methods can be independent of the refining process and do result in an environmentally cleaner burning fuel.
本研究的目的是去除石油衍生柴油燃料中的有机氮化合物。这些氮化合物会造成环境问题，以及燃料不稳定性问题，会使燃料降解并影响发动机性能。使用两种不同的过滤介质——活性粘土和硅胶 tel 对燃料进行处理。对来自活性粘土和硅胶的二氯甲烷提取物进行 GC/MS 分析。将近 99%的总有机氮化合物被去除。所鉴定的氮化合物中约有 60%由吡啶、喹啉和四氢喹啉组成，占 26%，而吲哚和咔唑约占总氮化合物的 10%。在所鉴定的氮杂环中，吲哚和咔唑与燃料不稳定性反应有关。该方法已在来自不同国家的各种柴油燃料上进行了测试，结果表明可去除 97.8%至 99.9%的 N 化合物。本研究结果表明，这两种过滤材料都能有效去除有机氮化合物，并使燃料具有优异的储存稳定性。这些简单的过滤方法可以独立于精炼过程，并且确实可以得到燃烧更清洁的环境的燃料。
