Oxidative desulfurization of diesel using promising heterogeneous tungsten catalysts and hydrogen peroxide

Continuous Flow Desulfurization of a Model Fuel Catalysed by Titanium Functionalized UiO‐66

“…The development of an adequate reaction process and the synthesis and selection of the catalyst are decisive parameters in order to perform an efficient ODS route. A substantial scientific effort has been carried out indeed in testing different catalytic materials, ranging from classical mixed metal oxides to polyoxometalates and activated carbon . Excellent results have been achieved using Titanium based catalysts, which is the most commonly employed metal in ODS…”

Conventional and Upcoming Sulfur‐Cleaning Technologies for Petroleum Fuel: A Review

“…The best oxidant is the one that selectively oxidizes sulfur compounds only, whereas other organic compounds are left unaltered. It is important to mention that the oxidation process can be accelerated by adding various catalysts . Owing to its relatively benign effect on the environment, H 2 O 2 is the most common oxidant .…”

“…The following catalysts have been tested to improve the oxidation process: phosphotungstic acid, K 2 FeO 4 , Na 2 WO 4 , Mo/Al 2 O 3 , andV 2 O 5 . The oxidation efficiency of H 2 O 2 was improved by using phosphotungstic acid/alumina to eliminate DBT and its derivatives from diesel in 1.0 h . An extra step with the use of acetonitrile was necessary to remove byproducts .…”

“…It is important to mentiont hat the oxidation process can be acceleratedb y adding variousc atalysts. [32] Owing to its relatively benign effect on the environment,H 2 O 2 is the most common oxidant. [13] With the aid of variousc atalytic systems,O SCs in liquid fuels are effectively oxidizedb yH 2 O 2 .T he most employedc atalytic materials are HCOOH, CCl 3 COOH, CF 3 COOH, phosphotungstic acid, silicates,a nd solid bases.…”

Direct synthesis of mesoporous H 3 PMo 12 O 40 /SiO 2 and its catalytic performance in oxidative desulfurization of fuel oil

“…However, when the H 2 O 2 dosage upgraded to more than 0.05 mL, the desulfurization rates decreased obviously. It is likely because the oxidant used was the 30 wt.% H 2 O 2 aqueous solution, an acidic solution of pH 3.6 to inhibit the decomposition of H 2 O 2 , when the H 2 O 2 dosage increased, the concentration of H + in the catalytic system also increased, which strengthened the attack of the H + on the oxygen atom in Mo@O species and prevented the combination of the hydrogen atom in H 2 O 2 with the oxygen atom in Mo@O species to give out a water molecular to form the intermediate state of monoperoxomolybate species [26]. Therefore, the formation quantity of the hydroperoxymolybdate species in a unit time decreased and the desulfurization activity fell down.…”