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Catalytic oxidation-extractive desulfurization for model oil using inorganic oxysalts as oxidant and Lewis acid-organic acid mixture as catalyst and extractant

Paper ID Volume ID Publish Year Pages File Format Full-Text
40520 45857 2013 8 PDF Available
Title
Catalytic oxidation-extractive desulfurization for model oil using inorganic oxysalts as oxidant and Lewis acid-organic acid mixture as catalyst and extractant
Abstract

The catalytic oxidation-extractive desulfurization (COEDS) performance for benzothiophene (BT-) and dibenzothiophene (DBT-) containing oils is studied at room temperature with respect to three inorganic oxysalt oxidants (KMnO4, K2Cr2O7, and NaClO4) under the catalysis of an acid mixture being composed of different kinds and amounts of Lewis acid (FeCl3, ZnCl2 or CuCl2) and organic acid (formic, acetic or propionic acid). The results show that both KMnO4 and K2Cr2O7 are efficient oxidants, and their oxidizability can be adjusted effectively by the types and tuned slightly by the amounts of the Lewis acid used, and acetic acid is an appropriate organic acid. DBT is oxidized only to DBTO2, while BT is converted to two to over six oxidized S-species depending on the Lewis acid used. 1-hexene presented in oil can slightly lower the S-conversion, but a promising desulfurization rate of over 92% for both BT and DBT can be also achieved under appropriate conditions.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (160 K)Download as PowerPoint slideHighlights► BT and DBT in model oil are removed easily via a catalytic oxidation-extractive process. ► KMnO4 or K2Cr2O6 is an efficient oxidant for the sulfur in some Lewis organic acid mixtures. ► The catalysis of the oxidant can be effectively adjusted by the type and amount of Lewis acid. ► The acetic acid-Lewis acid mixtures are effective extractants for the oxidized sulfurs.

Keywords
Catalytic oxidation extractive desulfurization; Benzothiophene; Dibenzothiophene; Model oil; Lewis acid
First Page Preview
Catalytic oxidation-extractive desulfurization for model oil using inorganic oxysalts as oxidant and Lewis acid-organic acid mixture as catalyst and extractant
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 456, 10 April 2013, Pages 67–74
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis