Extraction coupled oxidative desulfurization of fuels to sulfate and water-soluble sulfur compounds using polyoxometalate catalysts and molecular oxygen

Albert J, Wasserscheid P, Bertleff B, Claußnitzer J, Korth W, Jess A (2017)

Publication Type: Journal article

Publication year: 2017

Journal

ACS Sustainable Chemistry & Engineering American Chemical Society

DOI: 10.1021/acssuschemeng.7b00087

Abstract

Our contribution demonstrates a new way of fuel desulfurization, namely selective oxidation of organic S-compounds present in fuels to water-soluble sulfur compounds followed by in situ extraction of the latter into an aqueous phase. Different from common oxidative desulfurization (ODS) processes, we demonstrate a technique that converts sulfur compounds in fuel to a large extent to sulfate (60--70%) using oxygen as the oxidant and an aqueous H8PV5Mo7O40 (HPA-5) solution as the catalyst phase. Other water-soluble desulfurization products are sulfoacetic acid (SAA) with a share of 10--20%, 2-sulfobenzoic acid (2-SBA), and 2-(sulfooxy)benzoic acid (2-SOBA), the latter two with a share of <10%. The new desulfurization method has been optimized for removing benzothiophene from isooctane, giving the best results with a degree of desulfurization of 99% applying 120 °C, 20 bar oxygen pressure, and 1000 rpm of 6 h reaction time using a volume water/oil ration of 10/1. Furthermore, we also successfully demonstrated the desulfurization of a domestic fuel oil with 973 ppmw sulfur content with a degree of desulfurization of 28% under nonoptimized conditions.

Authors with CRIS profile

Jakob Albert Lehrstuhl für Chemische Reaktionstechnik (CRT) Peter Wasserscheid Lehrstuhl für Chemische Reaktionstechnik (CRT) Benjamin Bertleff Lehrstuhl für Chemische Reaktionstechnik (CRT)

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM)

Involved external institutions

Universität Bayreuth DE Germany (DE)

How to cite

APA:

Albert, J., Wasserscheid, P., Bertleff, B., Claußnitzer, J., Korth, W., & Jess, A. (2017). Extraction coupled oxidative desulfurization of fuels to sulfate and water-soluble sulfur compounds using polyoxometalate catalysts and molecular oxygen. ACS Sustainable Chemistry & Engineering. https://doi.org/10.1021/acssuschemeng.7b00087

MLA:

Albert, Jakob, et al. "Extraction coupled oxidative desulfurization of fuels to sulfate and water-soluble sulfur compounds using polyoxometalate catalysts and molecular oxygen." ACS Sustainable Chemistry & Engineering (2017).

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