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LUP publications 2008

These compounds produce branched alkanes in a subsequent hydrodeoxygenation process, with suitable properties for being a renewable alternative to conventional fossil aviation fuels. The combination of activity and 2010-05-15 · This work presents the preparations of mesostructured silicas with propylsulfonic groups introduced into the materials by grafting and co-condensation route. This study assessed the influence of morphology and the materials over catalytic performance on an esterification reaction to produce 1-butylacetate using hexagonal (MCM-41, SBA-15, and HMS) and cubic (MCM-48) mesophases. sulfonic acid based silica mesopores (SASM) were primarily employed in biomass production [8-10,17,19]. In 2006, Melero and coworkers [20] extensively reviewed and discussed the advances, developments, and catalytic applications of organosulfonic acid-based mesopores in 1998-2006. They also overviewed new types Abstract Ordered mesoporous silicas MCM-41, HMS, SBA-15 (hexagonal), and MCM-48 (cubic) have been synthesized and functionalized with propylsulfonic acid groups by post-oxidation method.

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The combination of activity and The surfactants have been retired from the interior of the mesostructured silicas using an extraction method reported by Díaz et al. , . 1.5 g of dry as-synthesized material was dissolved in a mixture of HCl (20 mL) and EtOH (205 mL), the resultant mixture was refluxed at 70 °C for 24 h. The oxidation process is the same as described above. Sulfonic acid-functionalized mesostructured silicas have demonstrated excellent catalytic behaviour in the acetalisation of glycerol with acetone to yield 2,2-dimethyl-1,3-dioxolane-4-methanol, also known as solketal.

LUP publications 2008

Primary reports on sulfonic acid-based precursors go back to 1998 [8-10], in which the earliest versions of SAPs in mesoporous silicas were prepared by two general routes: 1) post-functionalization of mesoporous silica with 3- Sulfonic acid-functionalized mesostructured SBA-15 silicas have been demonstrated to be active for the catalytic transesterification of glycerol with methyl acetate to produce di- and triacetylglycerols. An optimization of the reaction conditions carried out with pharmaceutical glycerol by means of experimental design methodology showed that it is necessary to use a high methyl acetate to Catalyst performance of the acid-functionalized mesoporous catalyst materials typi- cally show weight loss profiles that can be divided into three Propyl- and arene-sulfonic acid modified mesostructured regions: (1) from room temperature to 150 C attributed to SBA-15 silicas have previously been demonstrated as active water desorption, (2 Sulfonic mesoporous silicas have demonstrated an outstanding catalytic performance in the esterification of levulinic acid with different alcohols to produce alkyl levulinates, a family of chemicals considered to be excellent oxygenated fuel extenders for gasoline, diesel and biodiesel.

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For the case of the organosilica, 1,2-bis-(triethoxysilyl)ethane (BTSE, Aldrich) was additionally incorporated. 10% of total silicon atoms were functionalized with propyl-sulfonic acid groups. Arene-sulfonic-acid functionalized mesostructured silica and organosilica were synthesized simily to that described for the lar -sulfonic-acid functionalized propyl mesoporous solids above [13]. In this case, following the prehydrolysis step of the A series of mercaptopropyl-functionalized wormhole mesostructures, denoted MP-HMS, have been prepared through the S0I0 assembly of alkylamine surfactants (S0) and mixtures of 3-mercaptopropyltrimethoxysilane and tetraethyl orthosilicate as framework precursors (I0). Unprecedented levels of organo functionalization, corresponding to at least 50% of the silicon sites, were achieved while Novel Solid Acid Catalysts: Sulfonic Acid Group‐Functionalized Mesostructured Polymers † R. Xing Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, North Zhongshan Rd. 3663, 200062 Shanghai (P.R.

These two sulfonic acidmodified - mesostructured silicas provide different acid strengths, as introduced by the different molecular environments of the sulfonic acid sites (Pr-SBA-15 < Ar-SBA-15). Commercial acid catalysts: Nafion®-SiO 2 composite (SAC-13) with resin content ion-exchange resins, sulfonic acid mesostructured silicas, sulfonated carbons, heteropolyacids, sulfated zirconia and acidic ionic liquids have been studied for biodiesel synthesis [2],[3].
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Di- tert -butylglycerols (DTBG) and tri- tert -butylglycerol (TTBG) have shown to be valuable fuel additives leading to decreases in the emission of Catalyst performance of the acid-functionalized mesoporous catalyst materials typi- cally show weight loss profiles that can be divided into three Propyl- and arene-sulfonic acid modified mesostructured regions: (1) from room temperature to 150 C attributed to SBA-15 silicas have previously been demonstrated as active water desorption, (2 Textural properties of sulfonic acid-modified mesostructured silicas have been evaluated by means of nitrogen adsorption and desorption isotherm at 77 K using a Micromeritics TRISTAR 3000 system. ata were analyzed using the BJH model and D pore volume was taken at P/Po= 0.975 single point. Structural characterization was Sulfonic mesoporous silicas have demonstrated an outstanding catalytic performance in the esterification of levulinic acid with different alcohols to produce alkyl levulinates, a family of chemicals considered to be excellent oxygenated fuel extenders for gasoline, diesel and biodiesel. sulfonic acid-modified mesostructured silicas provide different acid strengths, as introduced by the different molecular environments of the sulfonic acid sites (Pr-SO 3 Textural properties of sulfonic acid-modified mesostructured silicas have been assessed by means of nitrogen adsorption and desorption isotherm at 77 K using a Micromeritics TRISTAR 3000 system. Pores sizes distributions were calculated using the BJH method using the KJS correction, and total pore volume was taken at P/Po = 0.975 single point. A series of mercaptopropyl-functionalized wormhole mesostructures, denoted MP-HMS, have been prepared through the S0I0 assembly of alkylamine surfactants (S0) and mixtures of 3-mercaptopropyltrimethoxysilane and tetraethyl orthosilicate as framework precursors (I0).

View 0 peer reviews of Efficient conversion of levulinic acid into alkyl levulinates catalyzed by sulfonic mesostructured silicas on Publons Download Web of Science™ My Research Assistant : Bring the power of the Web of Science to your mobile device, wherever inspiration strikes. (B) The pathway used for the preparation of mesostructured MSU-G silicas. ( C ) The XRD patterns for the pristine surfactant were recorded for a 88:12 (v/v) water:ethanol suspension of neutral C° 12-2-0 gemini surfactant at the same concentration (3.0 weight %) used for MSU-G synthesis ( 16 ) and a thin-film sample of the surfactant on glass. Synthesis and characterization of functionalized mesostructured silicas with acid sulphonic groups Universidad Rey Juan Carlos. Biblioteca. DSpace 6.2 Read "Supported and Free‐Standing Sulfonic Acid Functionalized Mesostructured Silica Films with High Proton Conductivity, European Journal of Inorganic Chemistry" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
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Biblioteca. DSpace 6.2 Read "Supported and Free‐Standing Sulfonic Acid Functionalized Mesostructured Silica Films with High Proton Conductivity, European Journal of Inorganic Chemistry" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Acid-catalyzed etherification of bio-glycerol and isobutylene over sulfonic mesostructured silicas Author MELERO, J. A 1; Melero JA, Morales G, Iglesias J, Paniagua M, Hernández B, Penedo S (2013) Efficient conversion of levulinic acid into alkyl levulinates catalyzed by sulfonic mesostructured silicas. Appl Catal A 466:116–122.

2020 Dec 12;9(12):E1854. doi: 10.3390/foods9121854. Abstract Silica‐supported sulfonic acids are a class of solid Brønsted acid catalysts that generally comprise organo‐sulfonic acid groups tethered to silica surfaces. Propyl-sulfonic-acid functionalized mesostructured silica and organosilica were synthesized following a one-pot co-condensation procedure previously employed for the prepara-tion of propyl-sulfonic-acid functionalized silica SBA-15 [11]. For the case of the organosilica, 1,2-bis-(triethoxysilyl)ethane (BTSE, Aldrich) was additionally incorporated. View 0 peer reviews of Efficient conversion of levulinic acid into alkyl levulinates catalyzed by sulfonic mesostructured silicas on Publons Download Web of Science™ My Research Assistant : Bring the power of the Web of Science to your mobile device, wherever inspiration strikes.
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Detection and Recovery of Palladium, Gold and Cobalt Metals

An optimization of the reaction conditions carried out with pharmaceutical glycerol by means of experimental design methodology showed that it is necessary to use a high methyl acetate to 2008-08-31 · Sulfonic acid-functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yield tert-butylated compounds. Their activity and selectivity towards valuable products for fuel bio-additives (DTBG and TTBG) have shown to be comparable or even superior to those of macroporous sulfonic acid resins. The application of this chemistry to prepare pure Brønsted sulfonic acid functionalized mesoporous silicas has stimulated significant research effort in this area, since these materials are interesting alternatives to commercially available sulfonated polymer resins, such as Amberlyst–15 and Nafion-H (sulfonated polystyrene and perfluorinated sulfonic acid resins respectively), which suffer A mesoporous SBA-15 silica catalyst functionalized with phenylsulfonic acid groups (SBA-15-Ph-SO 3 H) as a novel hydrophobic nanoreactor solid acid catalyst for a one-pot three-component synthesis of 2H-indazolo [2,1-b]phthalazine-triones and triazolo [1,2-a]indazole-triones. Sulfonic-acid functionalized mesostructured silicas have demonstrated an excellent catalytic behavior in the etherification of glycerol with isobutylene to yiel Sulfonic acid-modified mesostructured silicas have demonstrated an excellent catalytic performance in the etherification of glycerol with isobutylene. Their activity and selectivity towards valuable products for fuel bio-additives (di- tert -butylglycerols and tri- tert -butylglycerol) have shown to be comparable or even superior to those of macroporous commercial sulfonic acid resins.