Efficient concurrent removal of sulfur and nitrogen contents from complex oil mixtures by using polyoxometalate-based composite materials

Abstract

The increasingly stringent regulations in relation to the environmental impact of employed industrial processes makes compulsory the development of alternative routes towards the reduction of the sulfur and nitrogen content in large scale chemical mixtures. Herein, we demonstrate for the first time the highly efficient application of polyoxometalate (POMs)/layered double hydroxide (LDHs) composite in deep desulfurization (1000 ppm) and denitrogenation (100 ppm) of complex model oil system under mild conditions (65 o C), with a corresponding decrease of the content to less than 10 and 1 ppm, respectively. The high efficiency of the heterogeneous catalyst along with the high stability and easy recovery of the catalytic system renders them promising candidates for greener catalytic applications.

Ionic liquids assisted desulfurization and denitrogenation of fuels

“…At the same time, the denitrogenation preceed with almost 100 % removal of pyridine, pyrrole, and quinoline. Yao and co authors [246]…”

Desulfurization and Denitrogenation Processes to Treat Diesel Using Mo(VI)‐Bipyridine Catalysts

“…Most of the processes reported in the literature focus only on the removal of sulfur compounds, with one well-studied example being oxidative desulfurization (ODS), which combines catalytic oxidation with liquid-liquid extraction to promote the removal of sulfur compounds without H 2 consumption [4][5][6]. There are a limited number of reports where ODS and oxidative denitrogenation (ODN) have been combined in a single process to simultaneously remove SCCs and NCCs [15][16][17][18][19]. Some of these stated high ODS and ODN efficiencies but using single sulfur and nitrogen oils [18,19], after several hours of reaction [15,16] and using t-BuOOH as oxidant [17].…”

“…There are a limited number of reports where ODS and oxidative denitrogenation (ODN) have been combined in a single process to simultaneously remove SCCs and NCCs [15][16][17][18][19]. Some of these stated high ODS and ODN efficiencies but using single sulfur and nitrogen oils [18,19], after several hours of reaction [15,16] and using t-BuOOH as oxidant [17].…”

Designing multifunctional SO3H-based polyoxometalate catalysts for oxidative desulfurization in acid deep eutectic solvents

“…Polyoxometalates (POMs), especially organic-inorganic hybrid POMs, have been attracting increasing attention in the eld of catalytic oxidation because of the tuneable acidic and redox properties of POMs and various cations. [35][36][37][38][39][40] However, the POMs generally show low catalytic activity without solvents or supports in the eld of oxidative desulfurization from diesel oil. 41,42 Moreover, little research has focused on the use of sulfonic group-substituted POM-based hybrids as catalysts.…”