Highly active phosphotungstic acid immobilized on amino functionalized MCM-41 for the oxidesulfurization of dibenzothiophene

Highly active phosphotungstic acid immobilized on amino functionalized MCM-41 for the oxidesulfurization of dibenzothiophene

Type	Journal Article
Author	Guangqin Luo
Author	Lihua Kang
URL	http://www.sciencedirect.com/science/article/pii/S0378382013002610
Volume	118
Pages	20-27
Publication	Fuel Processing Technology
Date	February 2014
Abstract	Researchers immobilized phosphotungstic acid H3PW12O40 (HPW) on the surface of MCM-41 functionalized with amino groups. Characterization results revealed that the surface area of MCM-41 support decreased after it was functionalized with amino groups, whereas the HPW active species retained its Keggin structure. HPW–NH2–MCM-41 displayed excellent catalytic performance for oxidesulfurization (ODS) of dibenzothiophene (DBT). Under optimal conditions, the conversion of DBT reached up to 100%. The catalyst could be recycled five times without significant loss of catalytic activity. Researchers ascribe the excellent recyclability to the strong interaction between the amino groups and the HPW species.