The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Heteropoly acids have attracted increasing attentions in oxidative desulfurization (ODS) field, but the solubility and low surface area hindered their applications. Moreover, bulk silicotungstic acid (HSiW) was less researched, owing to its relative lower activity. Herein, a layered-structure hexagonal boron nitride (h-BN) was employed for dispersion of HSiW by impregnation method. Interestingly,...
It is of great importance to develop efficient catalysts to achieve sulfur removal in fuel, protecting the world against the pollution caused by sulfur oxides. Aiming that, polyoxometalates supported materials have been employed as a vital class of heterogeneous catalysts for oxidative desulfurization. In this study, a serial of magnetic polyoxometalates-based mesoporous silica hybrid materials were...
A supported heterogeneous catalyst with polyoxometalate-based ionic liquid (POM-IL) [N-(3-sulfonatepropyl)-pyridinium]3PMo12O40 ([PSPy]PMo) served as active component was prepared and graphite carbon (GC) with layer structure was used as support. Characterizations of the supported catalyst by FT-IR, Raman, XRD, XPS and TEM confirmed that IL was immobilized on GC successfully and the structure was...
O2−) was the active oxygen species and DBTO2 was the only oxidation product of DBT in the ECODS system. The recycling experiments indicated that sulfur removal could still reach 95.5% after 12 times.
Extraction of aromatic sulfur compounds from model oil using a temperature-responsive ionic liquid (IL) N-butyl-N-methylpiperidinium tetrachloroferrate ([C4mpip]FeCl4) as extractant has been investigated. In the extractive desulfurization process, liquid–liquid equilibrium was obtained at 45°C for 10min. After the extraction system was cooled to room temperature, the IL returned to solid due to the...
Supported ionic liquid catalysts with different loading of [Bmim]FeCl4 embedded in silica gel were synthesized and characterized. The results demonstrated that ionic liquid [Bmim]FeCl4 was embedded in the silica gel successfully with no destruction to its structure. The amount of [Bmim]FeCl4 was decreased sharply in the extractive coupled with catalytic oxidative desulfurization (ECODS) system. The...
A series of W-containing mesoporous silicas with different calcination temperatures were in situ synthesized by using [(n-C 8 H 17 ) 3 NCH 3 ] 2 W 2 O 11 not merely as a novel template but also the W precursors. The catalysts were characterized by N 2 adsorption–desorption, XRD, XPS, HRTEM, EDS, ICP, FTIR, and UV–vis DRS analysis. The...
Oxidation of dibenzothiphene (DBT) in model oil with H 2 O 2 using surfactant-type decatungstates Q 4 W 10 O 32 (Q=(CH 3 ) 3 NC 16 H 33 , (CH 3 ) 3 NC 14 H 29 , (CH 3 ) 3 NC 12 H 25 and (CH 3 ) 3 NC 10 H 21 ) as catalysts was studied...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.