MFI Acid Catalysts with Different Crystal Sizes and Porosity for the Conversion of Furanic Compounds in Alcohol Media
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DOI: 10.1002/cctc.201601236
Abstract: Solid acid catalysts possessing MFI topology and different crystal sizes and porosities were explored for the conversion of carbohydrate‐biomass‐derived α‐angelica lactone and 5‐(hydroxymethyl)furfural, in 1‐butanol at T=120–170 °C, to give levulinate esters and furanic ethers. Micro/mesoporous… read more here.
Keywords: mfi acid; conversion; crystal sizes; different crystal ... See more keywords
Octyl Co‐grafted PrSO3H/SBA‐15: Tunable Hydrophobic Solid Acid Catalysts for Acetic Acid Esterification
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DOI: 10.1002/cctc.201601370
Abstract: Propylsulfonic acid (PrSO3H) derivatised solid acid catalysts have been prepared by post‐modification of mesoporous SBA‐15 silica with mercaptopropyltrimethoxysilane (MPTMS), and the impact of co‐derivatisation with octyltrimethoxysilane (OTMS) groups to impart hydrophobicity to the catalyst was… read more here.
Keywords: solid acid; sba; acid catalysts; acid esterification ... See more keywords
Pyrolysis of the Cellulose Fraction of Biomass in the Presence of Solid Acid Catalysts: An Operando Spectroscopy and Theoretical Investigation.
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DOI: 10.1002/cssc.201802073
Abstract: Biomass pyrolysis by solid acid catalysts is one of many promising technologies for sustainable production of hydrocarbon liquid fuels and value-added chemicals, but these complex chemical transformations are still poorly understood. A series of well-defined… read more here.
Keywords: solid acid; pyrolysis; spectroscopy; acid catalysts ... See more keywords
Rational Optimization of Lewis-Acid Catalysts for the Direct Amination of Alcohols, Part 1 - Activity Descriptors for Metal Triflates and Triflimides
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DOI: 10.1002/ejoc.202000229
Abstract: Herein we report a comparison of Lewis acidity indicators (affinity scales, electronegativity, Fukui functions, global electrophilicity index) with a new in silico Beckett-Childs descriptor based on the build-up of partial charge, computed by DFT, on… read more here.
Keywords: lewis acid; rational optimization; acid catalysts; optimization lewis ... See more keywords
Preparation and Characterization of Biomass Carbon–Based Solid Acid Catalysts for the Esterification of Marine Algae for Biodiesel Production
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DOI: 10.1007/s12155-019-9965-0
Abstract: Biomass carbon derived from rice husk (RH), Moringa oleifera seeds (MOR), and biomass of lipid extracted marine algae (BM) bearing sulfuric acid groups, were investigated for the potential application to environmental benign biodiesel production. The… read more here.
Keywords: solid acid; carbon; biomass; biodiesel production ... See more keywords
Niobium-doped TiO2 solid acid catalysts: Strengthened interfacial polarization, amplified microwave heating and enhanced energy efficiency of hydroxymethylfurfural production
Sign Up to like & getrecommendations! Published in 2019 at "Applied Catalysis B: Environmental"
DOI: 10.1016/j.apcatb.2018.11.013
Abstract: Abstract TiO2 solid acid catalysts with different niobium (Nb) doping ratios (8, 16, and 24 mol%) were synthesized for microwave-assisted catalytic conversion of fructose to hydroxymethylfurfural (HMF). Nb doping has been demonstrated effective to enhance the… read more here.
Keywords: energy efficiency; tio2 solid; solid acid; acid catalysts ... See more keywords
Screening of solid acid catalysts for etherification of glycerol with isobutene under identical conditions
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DOI: 10.1016/j.cattod.2019.07.025
Abstract: Abstract We compared the performance of more than 70 solid acid catalysts with Bronsted acid function for the etherification of glycerol with isobutene under identical reaction conditions of 75 °C, 10 bar, 6 h and with an isobutene/glycerol… read more here.
Keywords: glycerol isobutene; solid acid; glycerol; acid catalysts ... See more keywords
Preparation of chemically uniform and monodisperse microparticles as highly efficient solid acid catalysts for aldol condensation
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DOI: 10.1016/j.ces.2017.09.052
Abstract: Abstract Highly active heterogeneous catalysts are in high demand, but realizing an efficient heterogeneous catalyst with uniform active sites remains challenging. In this study, we present a facile preparation of carboxylic acid-incorporated monodisperse microparticles (COOH-MPs)… read more here.
Keywords: solid acid; aldol condensation; cooh mps; acid catalysts ... See more keywords
Improvement of levoglucosenone selectivity in liquid phase conversion of cellulose-derived anhydrosugar over solid acid catalysts
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DOI: 10.1016/j.fuproc.2020.106625
Abstract: Abstract The pyrolysis of cellulose produces anhydrosugars, levoglucosan (LGA) in particular, as a primary product. In this work, the liquid phase conversion of anhydrosugars over solid acid catalysts was investigated, mainly using LGA, as a… read more here.
Keywords: solid acid; phase conversion; liquid phase; acid catalysts ... See more keywords
New approach for sulfonation of carbonaceous materials: Highly efficient solid acid catalysts for benzaldehyde acetalization with ethylene glycol
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Physics and Chemistry of Solids"
DOI: 10.1016/j.jpcs.2020.109846
Abstract: Abstract Three kinds of carbonaceous solid materials, namely activated carbon (AC), graphene oxide (GO), and graphene oxide–magnetite nanocomposite (GO/SCMNPs), have been utilized as catalyst supports to immobilize active acid sites on their surfaces. In this… read more here.
Keywords: solid acid; acid catalysts; acetalization; ethylene glycol ... See more keywords
Heteropoly acid catalysts for the valorization of biorenewables: Isomerization of caryophyllene oxide in green solvents
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DOI: 10.1016/j.mcat.2017.12.019
Abstract: Abstract The isomerization of caryophyllene oxide, one of the most widespread sesquiterpenes found in various essential oils, is catalyzed by the acidic Cs salt of tungstophosphoric heteropoly acid, Cs2.5H0.5PW12O40, to give rare polycyclic oxygenated sesquiterpenes… read more here.
Keywords: heteropoly acid; caryophyllene oxide; isomerization caryophyllene; valorization biorenewables ... See more keywords