Selective adsorption of nitrogen compounds using silica-based mesoporous materials as a pretreatment for deep hydrodesulfurization

J. C. García-Martínez, H. A. González Uribe, M. M. González-Brambila, J. A. Colín-Luna, Y. E. Escobedo-García, A. López-Gaona, L. Alvarado-Perea

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12 Scopus citations

Abstract

© 2017 Elsevier B.V. The adsorption of quinoline (Q) and dibenzothiophene (DBT)—model compounds for nitrogen and sulfur in diesel fuels—over mesoporous SBA-15, SBA-16, and MCM-41 was studied. The Langmuir model was suitable for describing the adsorption of nitrogen-containing compounds from a simulated diesel fuel. A pseudo-second-order kinetic model better fitted the Q adsorption data than a first-order rate model when describing the adsorption rates on all materials. Comparison of the adsorption of Q and DBT confirmed that the nitrogen compound was selectively removed, and MCM-41 was found to have better adsorption characteristics than SBA-15 and SBA-16. DBT was not adsorbed in any experiment. The adsorbents were characterized using N2-physisorption, powder X-ray diffraction, and high-resolution transmission electron microscopy to describe the morphologies of the adsorbents. The characterization results revealed that the specific area and the structure of the adsorbent are key parameters required to explain the adsorption process.
Original languageAmerican English
Pages (from-to)40-48
Number of pages35
JournalCatalysis Today
DOIs
StatePublished - 1 May 2018
Externally publishedYes

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