Synthesis and characterization of new nanocomposite CTAB@POM@TiO₂ as an efficient heterogeneous catalyst for oxidative desulfurization of gas oil

Abstract

Oxidative desulfurization of gas oil and model compounds that exist in gas oil with acetic acid/hydrogen peroxide using nanoparticle of [C₁₆H₃₃N(CH₃)₃]₇H₃[P₂W₁₈Cd₄O₆₈]@TiO₂ as a nano scavenger has been studied. This sandwich-type nanoparticle was shown to be able to scavenge hydrogen sulfide and mercaptans in high yields. The addition of acetic acid enhanced the conversion. This system provides an efficient, convenient and practical method for scavenging sulfur compounds. The [C₁₆H₃₃N(CH₃)₃]₇H₃[P₂W₁₈Cd₄O₆₈]@TiO₂ nanoparticle was synthesized by an unusual reaction with titanium tetraisopropoxide at 100 °C via sol–gel method under oil-bath condition. The materials characterized by ³¹P NMR, XRD, TEM, IR and UV–vis techniques.

Keywords:

• polyoxometale
• desulfurization
• anatase
• scavenger
• Keggin

Acknowledgment

The authors are grateful to the Research Council of Zanjan University for the partial support of this study.