Selection and further activation of activated carbons for removal of nitrogen species in gas oil as a pretreatment for its deep hydrodesulfurization
Selection and further activation of activated carbons for removal of nitrogen species in gas oil as a pretreatment for its deep hydrodesulfurization
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DOI：
10.1021/ef034080e
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发表时间：
2004-03
期刊：
影响因子：
5.3
通讯作者：
Yosuke Sano;Ki-hyouk Choi;Y. Korai;I. Mochida
中科院分区：
文献类型：
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作者：
Yosuke Sano;Ki-hyouk Choi;Y. Korai;I. Mochida
证实了部分脱除柴油中的氮和难脱硫物种是实现深度加氢脱硫的有效途径。这种脱除是通过氧化进一步活化的活性碳材料有效地执行的，然后进行热处理，以最大限度地提高传统材料对氮和难处理硫物种的吸附能力。用特定的氧化剂如HNO_3、H_2SO_4和H_2O_2活化，然后在合适的温度下进行热处理，通过在活性碳上引入特定的含氧官能团，显著提高了对氮物种的吸附能力。从碳材料的结构与氮硫吸附容量的关系来看，在氦气气氛中600−800℃下释放CO的特殊氧基团和碳材料的比表面积是影响氮硫物种吸附的关键。
The partial removal of nitrogen and refractory sulfur species from gas oil was confirmed to be effective to achieve deep hydrodesulfurization. Such removal was effectively performed over activated carbon materials that were further activated by oxidation, followed by heat treatment, to maximize the adsorption capacity of conventional materials for nitrogen and refractory sulfur species. Activation with particular oxidants such as HNO3, H2SO4, and H2O2, followed by heat treatment at their appropriate temperature, dramatically improved the adsorption capacity for nitrogen species by introducing the particular oxygen functional groups on activated carbon. From the correlation between the structure of carbon material and the adsorption capacity for nitrogen and sulfur, particular oxygen groups that release CO at a temperature of 600−800 °C in a helium atmosphere and the surface area of the carbon materials are keys for the adsorption of nitrogen and sulfur species.