Catalyst, Emulsion Stabilizer, and Adsorbent: Three Roles In One for Synergistically Enhancing Interfacial Catalytic Oxidative Desulfurization

Abstract

A Pickering emulsion catalytic system was proposed to reduce the transfer limitation between two immiscible reactant phases for enhancing the kinetics of heterogenetic oxidative desulfurization (ODS). By loading phosphotungstic acid (HPW) nanoparticles on a novel pyridine-based porous organic polymer of P[tVPB-VP x ], the amphiphilic catalysts were produced and used as the stabilizer for Pickering emulsions. Specifically, an ultrafast ODS rate was realized in the HPW/P[tVPB-VP 1 ]-stabilized Pickering emulsion catalytic system, and just within 15 min, 100 ppm dibenzothiophene (DBT) was completely oxidized by H 2 O 2 . Because the obtained hierarchical porous HPW/P[tVPB-VP x ] catalysts showed both high adsorption capacity of DBT and excellent catalytic ODS performance, the catalysts assembling at the interface of emulsions provided this fastest reaction dynamics. Playing three roles of catalyst, emulsion stabilizer, and adsorbent, the synergistic functional catalytic emulsions can be a promising approach to significantly boost the heterogeneous catalytic ODS performance.

Creation of Active Sites in MOF‐808(Zr) by a Facile Route for Oxidative Desulfurization of Model Diesel Oil

“…This means that 4,6‐DMDBT should be easily oxidized when compared with BT and DBT. In fact, some earlier reports displayed the difficulty of oxidation in the order of BT > DBT > 4,6‐DMDBT . However, in this work, the catalytic data show that the conversion of sulfur compounds follows the order of DBT > BT > 4,6‐DMDBT.…”

Multiphase Microreactors Based on Liquid–Liquid and Gas–Liquid Dispersions Stabilized by Colloidal Catalytic Particles

“…. Particle-stabilized L-L-S microreactors for oxidation reactions:a )Epoxidation of olefins; [75,76,81] b) Partial oxidation of alcohols, [83,85,89] benzene hydroxylation, [90] and oxidation of sulfides [91] for synthesis;c )Partial/totalo xidation [92][93][94][95][96] and photocatalytic oxidation [97,98] for depollution.…”

Preparation of WO3/CNT catalysts in presence of ionic liquid [C16mim]Cl and catalytic efficiency in oxidative desulfurization

“…Among these technologies, ODS has been considered to have great prospects owing to its excellent advantages, including low operation cost, high efficiency and moderate reaction conditions. During the process of ODS, organic sulfur compounds can be oxidized under mild conditions to sulfones or sulfoxides, which can be easily removed by polar extractants …”

“…During the process of ODS, organic sulfur compounds can be oxidized under mild conditions to sulfones or sulfoxides, which can be easily removed by polar extractants. 7,8 Based on the advantages of ODS, various types of catalyst such as polyoxometalates, 9,10 ionic liquids 11 and metal oxides 12,13 have been developed. Tungsten trioxide (WO 3 ) has been applied in various fields because of its acidic and thermal stability and good crystallinity.…”

“…To obtain fuels with ultra‐low sulfur content, numerous alternative non‐HDS technologies such as adsorption desulfurization (ADS), extraction desulfurization (EDS) and oxidative desulfurization (ODS) have been developed. Among these technologies, ODS has been considered to have great prospects owing to its excellent advantages, including low operation cost, high efficiency and moderate reaction conditions.…”