Deep oxidative desulfurization catalyzed by (NH₄)_xH_4−xPMo₁₁VO₄₀(x = 1, 2, 3, 4) using O₂as an oxidant

Abstract

NH4+doped PMoV composites catalytic materials are successfully prepared.

Investigations on Catalyst Stability and Product Isolation in the Extractive Oxidative Desulfurization of Fuels Using Polyoxometalates and Molecular Oxygen

“…Consequently, aqueous solutions of HPA-5 contain not only the parent H 8 (HPA-0). Moreover, different isomers depending on the degree of V-substitution in the Keggin structure are to be expected.…”

“…ODS can be conducted under mild operating conditions using a catalyst and an oxidant. The literature deals predominantly with selective oxidation of organic sulfur compounds to their corresponding sulfoxides/sulfones using H 2 O 2 , organic peroxides or molecular oxygen as oxidants. Using cheap and abundant molecular oxygen as oxidant, predominantly vanadium containing polyoxometalates (POMs) have been suggested as catalysts ,,.…”

“…The literature deals predominantly with selective oxidation of organic sulfur compounds to their corresponding sulfoxides/sulfones using H 2 O 2 , organic peroxides or molecular oxygen as oxidants. Using cheap and abundant molecular oxygen as oxidant, predominantly vanadium containing polyoxometalates (POMs) have been suggested as catalysts ,,. Other suitable catalysts are metal oxides,, carbon nanotubes and carboxylic acids …”

“…Using cheap and abundant molecular oxygen as oxidant, predominantly vanadium containing polyoxometalates (POMs) have been suggested as catalysts. [5,7,8] Other suitable catalysts are metal oxides, [9,10] carbon nanotubes [6] and carboxylic acids. [11] ODS is typically combined with an additional separation step necessary for the removal of sulfoxides/sulfones from the fuel.…”

Molybdenum anchored on NH2‐modified spherical SiO2: A highly efficient and stable catalyst for oxidative desulfurization of fuel oil

“…In recent years, deep sulfur removal of transportation fuels has attracted great attention from petroleum refiners worldwide, due to the exigent regulations regarding environmental safety and the improvement of transportation fuel quality . In Beijing, the capital of China, the ‘Beijing six’ fuel standard (S <10 ppmw) has been carried out since 2017, and the sulfur content in diesel fuel must be lower than 10 ppmw in many developed countries . Industrially, hydrodesulfurization (HDS) is a conventional method for removing sulfur; however, this process is less effective at removing refractory sulfur compounds, such as dibenzothiophene (DBT) and its derivatives substituted at the 4‐ and/or 6‐positions .…”