Deep Desulfurization by Amphiphilic Lanthanide-Containing Polyoxometalates in Ionic-Liquid Emulsion Systems under Mild Conditions

Chemistry - A European Journal, Volume 19, Issue 2, pages 709–715, January 7, 2013
Deep Desulfurization by Amphiphilic Lanthanide-Containing Polyoxometalates in Ionic-Liquid Emulsion Systems under Mild Conditions
Junhua Xu, Shen Zhao, Yuanchun Ji, Prof. Yu-Fei Song*
songyufei@hotmail.com
songyf@mail.buct.edu.cn
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029 (P.R. China), Fax: (+86) 10-64431832
Abstract
After preparation of amphiphilic lanthanide-containing polyoxometalates (POMs) by surfactant encapsulation, examination of these lanthanide-containing POMs in oxidative desulfurization (ODS) revealed that highly efficient deep desulfurization could be achieved in only 14 min with 100 % conversion of dibenzothiophene under mild conditions by using (DDA)₉LaW₁₀/[omim]PF₆ (DDA=dimethyldioctadecylammonium, omim=1-octyl-3-methyl-imidazolium) in the presence of H₂O₂.
In addition, deep desulfurization proceeds smoothly in model oil with an S content as low as 50 ppm. A scaled-up experiment in which the volume of model oil was increased from 5 to 1000 mL with S content of 1000 ppm suggested that about 99 % sulfur removal can be achieved in 40 mins in an ionic-liquid emulsion system.
Full Text Source (Subscription or Fee): http://onlinelibrary.wiley.com/doi/10.1002/chem.201202595/abstract?deniedAccessCustomisedMessage=&userIsAuthenticated=false