Oxidative Desulfurization of Diesel Fuel Catalyzed by Polyoxometalate Immobilized on Phosphazene-Functionalized Silica

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstract

Keggin-type polyoxometalates (POM) immobilized on alkylaminophosphazene (RPN)-functionalized silica (POM/RPN-SiO 2) are new effective single-site solid catalysts for oxidative desulfurization (ODS) of diesel fuel under mild conditions in a biphasic system composed of a benzothiophene-containing model diesel fuel (heptane) and aqueous 30% H 2O 2. The catalytic activity of POM/RPN-SiO 2 was found to be influenced by the choice of POM and the amine R group in RPN, decreasing in the order PMo > PW > SiW and Bz > iBu > iPr, respectively. The most effective catalyst, PMo/BzPN-SiO 2 (PMo = PMo 12O 40 3−), exhibited 100% removal of dibenzothiophene from model diesel fuel at 60 °C and ambient pressure and could be reused without loss of activity. This catalyst outperforms other recently reported heterogeneous catalysts for ODS in similar systems. 13C, 29Si and 31P MAS NMR, FTIR, SEM, BET and elemental analysis were used to characterize the structure of surface phosphazene and POM species in the new catalysts.

OriginalsprogEngelsk
TidsskriftApplied Catalysis B: Environmental
Vol/bind231
Sider (fra-til)82-91
ISSN0926-3373
DOI
StatusUdgivet - 5. sep. 2018

Fingeraftryk

Dyk ned i forskningsemnerne om 'Oxidative Desulfurization of Diesel Fuel Catalyzed by Polyoxometalate Immobilized on Phosphazene-Functionalized Silica'. Sammen danner de et unikt fingeraftryk.

Citationsformater