Research Article pubs.acs.org/journal/ascecg
Extraction Coupled Oxidative Desulfurization of Fuels to Sulfate and Water-Soluble Sulfur Compounds Using Polyoxometalate Catalysts and Molecular Oxygen Benjamin Bertleff,† Johannes Claußnitzer,‡ Wolfgang Korth,‡ Peter Wasserscheid,†,§ Andreas Jess,‡ and Jakob Albert*,† †
Lehrstuhl für Chemische Reaktionstechnik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany ‡ Lehrstuhl für Chemische Verfahrenstechnik, Zentrum für Energietechnik (ZET), Universität Bayreuth, Universitätsstrasse 30, 95447 Bayreuth, Germany § Forschungszentrum Jülich GmbH, Helmholtz-Institut Erlangen-Nürnberg for Renewable Energy (IEK-11), Egerlandstrasse 3, 91058 Erlangen, Germany S Supporting Information *
ABSTRACT: Our contribution demonstrates a new way of fuel desulfurization, namely selective oxidation of organic S-compounds present in fuels to watersoluble 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 watersoluble 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
