Esters-buliding-blocks

Garg, Nitish K. published the artcileEfficient Conversion of Biomass Derived Levulinic Acid to γ-Valerolactone Using Hydrosilylation, Computed Properties of 539-88-8, the main research area is efficient conversion biomass derived levulinic acid Valerolactone hydrosilylation.

Converting biomass into value-added chems. is of significant interest and we report an efficient hydrosilylation to convert levulinic acid to γ-valerolactone using cost-effective silanes such as PMHS and TMDS with B(C6F5)3 as catalyst. This metal free methodol. works at room temperature reaching TONs and TOFs up to 16000 and 2000 h-1. Insights into the reaction mechanism are reported.

European Journal of Organic Chemistry published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Computed Properties of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Jori, Popat K. published the artcileEfficient Synthesis of γ-Valerolactone-A Potential Fuel from Biomass Derived Levulinic Acid Using Catalytic Transfer Hydrogenation Over Hf@CCSO3H Catalyst, Category: esters-buliding-blocks, the main research area is levulinic acid transfer hydrogenation valerolactone hafnium carbonaceous catalyst.

A new hafnium based carbonaceous catalyst (Hf@CCSO3H) was prepared by simultaneous carbonization and sulfonation of readily available glucose, followed by incorporation of hafnium metal on the surface of catalyst. The catalyst was well characterized using FT-IR, PXRD, EDX, SEM, 13C CPNMR, XPS and BET anal. The catalytic activity of Hf@CCSO3H was evaluated for synthesis of γ-valerolactone-a potential fuel and green solvent. γ-Valerolactone was synthesized from biomass derived levulinic acid by catalytic transfer hydrogenation using 150 wt% of catalyst at 200°C for 24 h in isopropanol solvent as a hydrogen donor. 100% conversion of levulinic acid was achieved with an excellent yield of 96% with more than 99% selectivity of γ-valerolactone as evident from GC anal. The method developed is simple, efficient and economical.

Catalysis Letters published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Jankovic, Bojan published the artcileCharacterization analysis of Poplar fluff pyrolysis products. Multi-component kinetic study, Application of Benzyl acetate, the main research area is Poplar fluff pyrolysis thermal conversion structural property.

This paper describes the pyrolysis of Poplar fluff (from Populus alba) using online apparatus, and carbonization process at 850 °C using the fixed bed reactor. Characteristics of pyrolysis products were examined Elemental and chem. analyses were shown that Poplar fluff has higher energy content characterized by increased content of fibrous structure (particularly cellulose). Independent parallel reactions model very well describes devolatilization process. It was found that increased amount of extractives can significantly affect on increased release of light gaseous products, but declining hydrocarbons, mostly the alkanes. Liquid product is mainly composed of phenolics, aldehydes, acids, esters and ketones. The carbonization process produces the great abundance of polycyclic aromatic hydrocarbons (PAH’s), where naphthalene is the most abundant. Mechanism for PAH’s formation was suggested. This study represents the first step in a much wider and more comprehensive way in thermal conversion processes of this type of fuel.

Fuel published new progress about Biomass. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Application of Benzyl acetate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Yang, Libin published the artcileEnhancing bioenergy production with carbon capture of microalgae by ultraviolet spectrum conversion via graphene oxide quantum dots, Category: esters-buliding-blocks, the main research area is graphene oxide quantum dot carbon capture microalgae bioenergy.

Microalgae play an important role in carbon sequestration by converting solar energy into biomass as an energy reserve. The conversion efficiency is often limited by light absorbed in the chloroplast. It is of great potential to enhance the photosynthesis capability by improving susceptibility of the light absorption by microalgae. Carbon-based quantum dots (QDs) are promising candidates for spectrum conversion, exhibiting remarkable biocompatibility, excellent water solubility, and customizable flexibility. Herein, we introduced graphene oxide quantum dots (GOQDs) with a blue light (465 nm) emission after UV (380 nm) excitation into the microalgae growth media. It is demonstrated that the UV light was effectively absorbed and utilized by the chlorophyll in the GOQDs-Chlorella pyrenoidosa system, resulting in a significantly increased photosynthetic activity. Moreover, a 20% improvement in carbon dioxide fixation and a 34% increase in bioenergy accumulation was found in the system. We further examined the microalgae metabolic pathways to reveal the biol. response mechanism with GOQDs. Results verified that the GOQDs facilitated photosystem II (PSII) energy transfer to improve the photosynthesis of microalgae and upregulated the metabolites of lipid biosynthesis, resulting in a higher biomass and lipid content. This work suggested that using GOQDs as a promising approach for to improve the photosynthetic efficiency of microalgae, as well as a great potential for enhancing carbon capture and bioenergy production, especially in the environments with higher solar UV irradiation

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Biomass. 2044-85-1 belongs to class esters-buliding-blocks, name is 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, and the molecular formula is C24H14Cl2O7, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Block, Sfeve published the artcileCoalescing agents in coatings, Product Details of C7H12O3, the main research area is carbon footprint coating coalescing agent.

The need to develop and implement affordable and sustainable large-scale operations for converting renewable resources to chem. building blocks is increasingly urgent and essential in reducing global dependence on fossil fuels, including the critical aspect of minimising the chem. industry carbon footprint.

European Coatings Journal published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Product Details of C7H12O3.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Li, Yafei published the artcileNano-H-ZSM-5 with Short b-Axis Channels as a Highly Efficient Catalyst for the Synthesis of Ethyl Levulinate from Furfuryl Alcohol, SDS of cas: 539-88-8, the main research area is HZSM5 catalyst ethyl levulinate furfuryl alc.

For the ethanolysis of biomass-derived furfuryl alc. (FA) to value-added Et levulinate (EL), the development of an efficient solid acid catalyst is very important for industrial application with high FA concentration Herein, a H-ZSM-5 catalyst with nano b-axis channels (NB-H-ZSM-5) was synthesized and used for the conversion of FA. Detailed catalyst characterization proved that the NB-H-ZSM-5 catalysts (Si/Al = 25∼125) with ∼70 nm b-axis channels were successfully prepared The NB-H-ZSM-5 catalyst with Si/Al = 75 showed the highest activity. Its structural characteristics allowed for fast diffusion of reactants and products and full utilization of active sites, which endowed it with higher activity compared to com. H-ZSM-5 (C-H-ZSM-5). Its moderate acidity effectively inhibited the polymerization of FA even at a high FA concentration of 20 weight %. The spent catalyst was easily regenerated by coke burn-off to give a good recyclability. Furthermore, based on the proposed reaction network, a method of phys. mixing the NB-H-ZSM-5 (75) catalyst with a small amount of Amberlyst-15 was proposed to further increase the EL yield from 64.7 to 82.1% at an FA concentration of 6 weight %.

ACS Sustainable Chemistry & Engineering published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, SDS of cas: 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

He, Jian published the artcileZrOCl2 as a bifunctional and in situ precursor material for catalytic hydrogen transfer of bio-based carboxides, Application In Synthesis of 539-88-8, the main research area is zirconium oxychloride carboxide catalytic hydrogen transfer.

Herein, we for the first time describe a direct and effective catalytic system based on ZrOCl2·8H2O capable of facilitating the one-pot one-step tandem synthesis of GVL from bio-based furfural or furfuryl alc. in 2-propanol by integrating sequential transfer hydrogenation, ring-opening, and transfer hydrogenation-cyclization reactions. A maximum GVL yield of 63.3% and 52.1% was achieved from furfuryl alc. and furfural at 200°C, resp. The synergistic effect of [ZrO(OH)2]n·xH2O species and Bronsted acid species H+, derived from in situ hydrolysis of ZrOCl2·8H2O, is accountable for its remarkable catalytic performance. Moreover, calcination of the leftover solid after tandem synthesis of GVL could fabricate a hollow microrod ZrO2 material, in which the formation of a microrod morphol. and hollow structure was probably attributed to the electrostatic repulsion forces among particles in the alc. solution and removal of generated humins/coke during the reactions within collected solids via calcination, resp. Importantly, hollow microrod ZrO2 innovatively featuring a high BET surface area, a large amount of acid-base sites and facile active-site accessibility thereby exhibited a superior performance in the catalytic transfer hydrogenation of biomass-derived aldehydes or ketones to ZrO2 prepared by the precipitation method.

Sustainable Energy & Fuels published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application In Synthesis of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhang, Qifang published the artcileAcidic ion functionalized N-doped hollow carbon for esterification of levulinic acid, Quality Control of 539-88-8, the main research area is acidic ion nitrogen doped hollow carbon esterification levulinate.

Acidic ion functionalized N-doped hollow carbon (NHC-[C4N][SO3CF3]) has been successfully synthesized by quaternization of N-doped hollow carbon (NHC) with 1,4-butanesultone, followed by ion exchange with trifluoromethanesulfonic acid. The catalyst was characterized by Fourier transform IR (FT-IR), SEM (SEM), acid-base titration techniques and other methods. A hollow spherical catalyst with regular morphol., high acid d. (2.72 mmol g-1) and good stability was obtained. Various characterizations showed that NHC-[C4N][SO3CF3] possesses abundant nanopores (3.41 nm), large Brunauer-Emmett-Teller (BET) surface area (154 m2 g-1) and strong and controllable Bronsted acid sites. The as-prepared NHC-[C4N][SO3CF3] was then used for the acid-catalyzed esterification of levulinic acid with ethanol. At the optimum conditions, the highest conversion of levulinic acid reached 94.17% and high conversion was maintained after recycling four times. Further investigation of the catalytic activity in the esterification of different aliphatic and aromatic alcs. with levulinate was carried out, showing good results.

New Journal of Chemistry published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Quality Control of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Peixoto, Andreia F. published the artcileProduction of ethyl levulinate fuel bioadditive from 5-hydroxymethylfurfural over sulfonic acid functionalized biochar catalysts, Product Details of C7H12O3, the main research area is hydroxymethylfurfural ethyl levulinate fuel bioadditive sulfonated biochar catalyst.

In this work, a series of novel -SO3H functionalized biochar materials were prepared and investigated for the first time as catalysts for the production of fuel additive Et levulinate (EL) from biomass-derived 5-hydroxymethylfurfural (HMF). The employed biochar was directly produced from vineyard pruning wastes by a simple hydrothermal treatment using water in subcritical conditions followed by 3 different one-step sulfonation processes. The effects of sulfonating agent, reaction temperature, reaction time and alc. solvent were examined Full HMF conversion together with outstanding EL yields (over 84%) were achieved at 130°C and after 6 h over the biochar functionalized with the organosilane 2-(4-chlorosulfonylphenyl)ethyltrimetoxysilane (BioC-S3). Catalyst characterization suggested that the high acid strength (0.983 mmol H+·g-1) derived from the anchoring of arylsulfonic groups were responsible for the promotion of acid-driven etherification and ethanolysis steps. The BioC-S3 catalyst can be recycled without a significant loss of catalytic activity, indicating the stability of – SO3H organosilane group structure in the porous biochar. The obtained results offer a competitive alternative for the production of fuel additives, such as alkyl levulinates, using low-cost and easy-to-prepare biochar-based catalysts, all from lignocellulose resources, as an example to support a future exploitation of a potential biorefinery.

Fuel published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Product Details of C7H12O3.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Kim, Juyeon published the artcileBio-based process for the catalytic production of ethyl levulinate from cellulose, Category: esters-buliding-blocks, the main research area is ethyl levulinate cellulose catalytic production.

This paper presents a bio-based process for the catalytic conversion of cellulose to Et levulinate and an anal. of its techno-economic feasibility. The said bio-based process relies as major feedstock on cellulose, which can be derived from lignocellulosic biomass. Cellulose is converted to Et levulinate via a homogeneous catalytic reaction whereby dilute sulfuric acid in combination with Al salts is the catalyst and ethanol is the solvent and reactant. This approach affords high Et levulinate yields but requires complex procedures for used catalyst and solvent recycling. Based on exptl. results on the homogeneous catalytic reaction and vapor-liquid equilibrium separation in the previous studies, a simulation was conducted that included process design, energy integration, and economic anal. Results from this simulation indicated the proposed bio-based process to afford a min. selling price of US$ 2,830 per ton of Et levulinate, which was highly dependent on an off-site supply of heating energy required for ethanol purification

Applied Energy published new progress about Biomass. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics