Gamma-valerolactone-based solvents

Fegyverneki, Dániel; Orha, László; Ланг, Г.; Horváth, István T.

doi:10.1016/j.tet.2009.11.013

Cited by 163 publications

(129 citation statements)

References 12 publications

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“…in comparison to (Sn) SSIE -beta1), suggests that the Lewis acidity of (SnAl) SSIE -beta1 was mainly due to Al-sites. The materials (SnAl) SSIE -beta1 (Si/Al=30) and H-beta (Si/Al=12.4) were more similar in terms of Si/Al and L/B ratios, and exhibited comparable 27 Al MAS NMR spectra (Figure 4), supporting the predominance of acid Al-sites in (SnAl) SSIE -beta1.…”

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confidence: 70%

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One-pot conversion of furfural to useful bio-products in the presence of a Sn,Al-containing zeolite beta catalyst prepared via post-synthesis routes

Antunes

Lima

Neves

et al. 2015

Journal of Catalysis

137

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Aiming at the valorisation of furfural (Fur) via sustainable routes based on process intensification and heterogeneous catalysis, the one-pot conversion of this renewable platform chemical to useful bio-products, namely furfuryl alkyl ethers (FEs), levulinate esters (LEs), levulinic acid (LA), angelica lactones (AnLs) and -valerolactone (GVL), was investigated using a single heterogeneous catalyst, in 2-butanol, at 120 ºC. Various chemical 2 reactions are involved in this process, which requires catalysts with active sites for acid and reduction chemistry. For this purpose, it was explored for the first time the catalytic potentialities of modified versions of zeolite beta containing Al and Sn sites prepared from commercially available nanocrystaline zeolite beta via post-synthesis partial dealumination followed by solid-state ion-exchange. The post-synthesis conditions influenced considerably the catalytic performances of these types of materials. The best-performing catalyst was (Sn) SSIE -beta1 with Si/(Al+Sn)=19 (Sn/Al=27.6), which led to total yield of bio-products of 83% at 86% Fur conversion, and exhibited steady catalytic performance for six consecutive runs. A systematic catalytic study using the prepared catalysts with different bio-products as substrates, together with the molecular level and microstructural characterisation of the materials, helped understand the effects of different material properties on the specific reaction pathways in the overall system. These studies led to mechanistic insights into the reaction network of Fur to the bio-products in alcohol media, upon which a kinetic model was developed for the first time. The superior performance of (Sn) SSIE -beta1 in various steps was related to the dealumination degree, dispersion and amount of Sn-sites, and acid properties.

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confidence: 70%

“…-Angelica lactone (AnL) is used for food flavouring and as aromas in the tobacco industry [24], pheromones [25] and fuel additives [14,26], while GVL is used as solvent for biomassrelated reactions [27,28], chemical intermediates [16][17][18][29][30][31][32][33] and fuels [16,17,34,35].…”

Section: Introductionmentioning

confidence: 99%

One-pot conversion of furfural to useful bio-products in the presence of a Sn,Al-containing zeolite beta catalyst prepared via post-synthesis routes

Antunes

Lima

Neves

et al. 2015

Journal of Catalysis

137

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“…GVL is a five carbons cyclic ester which have applications for production of perfumes, food additives 46 and as a solvent as well as a precursor for other green solvents [47][48] . Additionally, GVL can be used as fuel additive to current fuels derived from petroleum in similar way as ethanol.…”

Section: Reduction Of Levulinic Acid To Gamma-valerolactone (Gvl)mentioning

confidence: 99%

Conversion of biomass platform molecules into fuel additives and liquid hydrocarbon fuels

2014

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In this work some relevant processes for the preparation of liquid hydrocarbon fuels and fuel additives from cellulose, hemicellulose and triglycerides derived platform molecules are discussed. Thus, it is shown that a series of platform molecules such as levulinic acid, furans, fatty acids and polyols can be converted into a variety of fuel additives through catalytic transformations that include reduction, esterification, etherification, and acetalization reactions. Moreover, we will show that liquid hydrocarbon fuels can be obtained by combining oxygen removal processes (e.g. dehydration, hydrogenolysis, hydrogenation, decarbonylation/descarboxylation etc.) with the adjustment of the molecular weight via C-C coupling reactions (e.g. aldol condensation, hydroxyalkylation, oligomerization, ketonization) of the reactive platform molecules.

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“…Recently, supported nickel catalysts were reported for various organic transformations such as hydrogenation 8,9 , steam reforming reactions 10 reductive amination of alcohols 11 hydrodechlorination 12 partial oxidation 13 , and dry reforming of methane 14 . Amongst, hydrogenation is of great interest for both industry and academia.…”

Section: Literature Reviewmentioning

confidence: 99%

Untitled

2018

juc

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Highly dispersed nickel nanoparticles on supports such as rice extracted SiO 2 , and Activated carbon's were prepared by impregnation and reductive deposition method by using hydrazine as reducing agent. The high light of this work is to compare the characteristics and activity of the catalysts prepared by both impregnation and reductive deposition method. All catalysts were characterized by various techniques such as BET, SEM, XRD, reduction behavior by using TPR technique. XRD results suggests that all the catalytic systems showing peaks corresponding to the supports as well as metal precursor. Ni/RHSiO 2 , catalyst prepared by reductive deposition method show excellent conversion of nitrobenzene to aniline. This is due to the presence of higher number of well dispersed surface Ni species than other catalysts as evidenced by SEM studies. TPR results reveal the formation of metallic Ni species in the reductive deposition method.

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Gamma-valerolactone-based solvents

Cited by 163 publications

References 12 publications

One-pot conversion of furfural to useful bio-products in the presence of a Sn,Al-containing zeolite beta catalyst prepared via post-synthesis routes

One-pot conversion of furfural to useful bio-products in the presence of a Sn,Al-containing zeolite beta catalyst prepared via post-synthesis routes

Conversion of biomass platform molecules into fuel additives and liquid hydrocarbon fuels

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