Influence of the Chemical Composition of Silica鈥揂lumina Adsorbents in Sulfur and Nitrogen Compounds Removal from Hydrotreated Diesel

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• 作者：Joana M. P. F. Silva ; Erika B. Silveira ; Andr茅 L. H. Costa ; Cl谩udia O. Veloso ; Cristiane A. Henriques ; Fatima M. Z. Zotin ; Marcio L. L. Paredes ; Rodrigo A. Reis ; Sandra S. X. Chiaro
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：October 15, 2014
• 年：2014
• 卷：53
• 期：41
• 页码：16000-16014
• 全文大小：599K
• ISSN：1520-5045

文摘

The removal of sulfur and nitrogen compounds from oil derivatives is fundamental to fulfill the new environmental laws. Traditionally, this removal is carried out through hydrotreatment processes; however, regarding environmental and economic issues, the refining oil industry has been studying adsorption processes to reduce sulfur and nitrogen compound levels in diesel streams. The aim of this work was to study the influence of chemical composition and acid鈥揵ase properties of commercial alumina, silica, and silica鈥揳lumina samples on the removal of sulfur and nitrogen compounds from diesel streams. It was observed that acid and textural properties and surface composition influence the adsorptive capacity of the samples. The results indicated that the adsorbents tested were more efficient for the removal of nitrogen compounds. Kinetic and adsorption experiments using model fuel containing sulfur and nitrogen compounds were also carried out. Freundlich and Sips models described the adsorption of 4,6-dimethyldibenzothiophene and quinoline on silica鈥揳lumina, respectively.