Denitrogenation of raw diesel fuel by lithium-modified mesoporous silica

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 162; no. 2; pp. 649 - 655
• Main Authors: Koriakin, Anton, Ponvel, Kanagasabai Muruganandam, Lee, Chang-Ha
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier B.V 15.08.2010; Elsevier
• Subjects: Adsorbents; Adsorption; Applied sciences; Chemical engineering; Denitrogenation; Desulfurization; Diesel; Diesel fuels; Exact sciences and technology; Lithium ion; Manufacturing engineering; Mesoporous silica; Nitrogen compounds; Silicon dioxide; Solvents; Sulfur compounds; Desulfurization; Diesel; Mesoporous silica; Denitrogenation; Lithium ion; Diesel fuel; Adsorption capacity; Refinery; Organic solvent; Adsorption; Batchwise; Affinity; Hydrodesulfurization
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2010.06.014

Lithium-modified mesoporous silica adsorbents (YSP-Li and MCF-Li) were prepared in order to selectively remove nitrogen compounds from residue hydrodesulfurization diesel (RHDS DSL: 271.3 ppmw of nitrogen compounds and 430.2 ppmw of sulfur compounds) provided by a refinery factory. Adsorption properties, such as the adsorption capacity, adsorption rate, and the regeneration ability toward nitrogen and sulfur compounds, were measured through batch experiments at 15 and 45 °C. They were compared with the results of previously reported Si–Zr cogel experiments. The lithium-modified mesoporous silica adsorbents exhibited a much stronger adsorption affinity for nitrogen compounds than for sulfur compounds. With regards to the adsorption capacity and the adsorption rate, the lithium-modified mesoporous silica adsorbents exhibited improved performance when compared to Si–Zr cogel. Furthermore, the Li-modified adsorbents, especially YSP-Li, could be easily regenerated by MIBK, an organic solvent.