An amphiphilic catalyst based on sandwich-type polyoxometalate for deep desulfurization of fuels in ionic liquid. Issue 71 (13th July 2016)

• Record Type: Journal Article
• Authors: Xu, Yan; Ma, Wen-Wen; Dolo, Arouna; Zhang, Hong
• Is Part Of: RSC advances. Volume 6:Issue 71(2016)
• Page Start: 66841
• Page End: 66846
• Publication Date: 2016-07-13
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra09645j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A cobalt-based polyoxometalate, (STA)10 [Co4 (H2 O)2 (PW9 O34 )2 ] (SEP) (STA = stearyltrimethylammonium), was prepared by ionic exchange of K10 [Co4 (H2 O)2 (PW9 O34 )2 ] and STA·Cl. Abstract : A cobalt-based polyoxometalate, (STA)10 [Co4 (H2 O)2 (PW9 O34 )2 ] (SEP) (STA = stearyltrimethylammonium), was prepared by ionic exchange of K10 [Co4 (H2 O)2 (PW9 O34 )2 ] and STA·Cl. SEP was approved as an effective catalyst for desulfurization of fuels in [Bmim]PF6 by using aqueous H2 O2 as oxidant in an extraction and catalytic oxidative desulfurization system (ECODS). The optimum desulfurization conditions were obtained: DBT could be completely removed with only O/S molar ratio of 4 in 40 min at 60 °C in a three-liquid-phase micro-emulsion system. The catalyst could be recycled conveniently and reused at least six times without significantly reducing the desulfurization efficiency. Therefore, this catalyst shows excellent regeneration and a good prospect for industrial application. For different substrates, the efficiencies of sulfur removal decreased in the following order: DBT > 4, 6-DMDBT > BT under the same conditions. Furthermore, the catalytic oxidation desulfurization mechanism of SEP was studied.