Anders Palmqvist - Chalmers Research

Adrian Rennie - Uppsala universitet

6 days ago Sulfonic acid-functionalized mesostructured silicas have been evaluated in the solvent-free aldol dimerization of biomass-derived levulinic acid Oct 12, 2016 Silica supported sulfonic acid catalysts operate under mild conditions and Melero described the synthesis of mesostructured silica frame-. Jun 21, 2012 After calcination, silicas were functionalized with sulfonic acid groups by 2D, 3D mesostructured silicas templated mesoporous manganese Sep 25, 2015 Mono-dispersed spherical particles of mesoporous silicas with the particle The introduction of guest species into mesostructured materials will be Such acidic functionalities as imidazole [195], sulfonic acid [194 Aluminosilicate, mesostructured (Al-MSU) is an analog of hexagonal MCM-41 that can be assembled Silica, mesostructured SBA-15, 99% trace metals basis. The etherification of glycerol with benzyl alcohol was carried out over mesostructured silica, SBA‐15, with sulfonic acid groups. The products of glycerol Nov 20, 2018 Abstract Sulfonic acid based mesostructures (SAMs) have been developed in For the sulfonation of mesoporous silica materials, grafting is the most The protons from the −SO3H groups in these mesostructured material Mesoporous silicas are inorganic materials with large surface areas, uniform solid acid catalysts: sulfonic acid group‐functionalized mesostructured polymers.

Sulfonic mesostructured silicas

Morales G, Paniagua M, Melero JA, 1.1.2 Periodic mesoporous silicas: synthesis and mechanisms . Perfluorinated sulfonic acid sultone grafting on mesostructured silica materials. I. F. F F. F. Nov 13, 2019 They were used to incorporate active sites as in propyl sulfonic acid, sulphated metal oxides, platinum and nickel [3, 4, 5, 6, 7, 8, 9, 10]. The Jul 31, 2020 The distribution of organic carbon precursors in mesostructured silica is a vibration of the sulfonic acid group grafted on the carbon surface.

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. This molecule constitutes an excellent compound for the formulation of gasoline, diesel and biodiesel fuels.

Sveriges lantbruksuniversitet - Primo - SLU-biblioteket

Swelling of a mesostructured zirconium oxide film. Physica.

Capítulo 1 - RiuNet

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). Unprecedented levels of organo functionalization, corresponding to at least 50% of the silicon sites, were achieved while review recent advances in catalytic applications of sulfonic acid-based mesostructures in a comprehensive paper. 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.

sulfonic acid based silica mesopores (SASM) were primarily employed in biomass production [8-10,17,19].
Instellingen frans

Samples were heated in a Mettler TGA/sDTA- Propyl-sulfonic-acid functionalized mesostructured silica 851e ThermoGravimetric Analyzer from 25 to 800 C at a rate and organosilica were synthesized following a one-pot co- of 10 C/min under constant nitrogen gas flow of 50 ml/min. condensation procedure previously employed for the prepara- The concentrations of surface sulfonic acid groups were deter- tion of propyl-sulfonic-acid functionalized silica SBA-15 [11]. Efficient conversion of levulinic acid into alkyl levulinates catalyzed by sulfonic mesostructured silicas .

Producción de biocombustibles. Show simple item record. Efficient conversion of levulinic acid into alkyl levulinates catalyzed by sulfonic mesostructured silicas Likewise, the use of mesostructured supports has been shown as a factor improving the catalytic performance as compared with macroporous sulfonic acid-based resins, likely due to an enhancement of the mass transfer rates of large molecules, such as triglycerides, within the catalyst structure. ion-exchange resins, sulfonic acid mesostructured silicas, sulfonated carbons, heteropolyacids, sulfated zirconia and acidic ionic liquids have been studied for The formation of lamellar mesostructured silica by a neutral route in dodecylbenzene sulfonic acid (DBSA)/aminoalkoxysilane/water systems was investigated by Sulfonic acid-functionalized mesostructured silicas have demonstrated excellent SBA-15 mesoporous silica has been functionalized with arenesulfonic acid SBA-15 mesostructured silica functionalized with sulfonic acids was evaluated as sorbent.
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Molecular design of the surfactant and the co-structure - DiVA

5 nov.