Recent trends in sustainable biodiesel production using heterogeneous nanocatalysts: Function of supports, promoters, synthesis techniques, reaction mechanism, and kinetics and thermodynamic studies

Energy Conversion and Management, Год журнала: 2023, Номер 280, С. 116821 - 116821

Опубликована: Фев. 22, 2023

Язык: Английский

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Bio-coal and bio-coke production from agro residues

Chemical Engineering Journal, Год журнала: 2023, Номер 473, С. 145340 - 145340

Опубликована: Авг. 10, 2023

Язык: Английский

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Esterification of levulinic acid over tetravalent metal phosphates: An efficient route to fuel additives

Catalysis Today, Год журнала: 2024, Номер 442, С. 114905 - 114905

Опубликована: Июнь 26, 2024

Layered materials, including tetravalent metal phosphates and phosphonates, have been widely investigated in several fields acting as good, selective catalysts a great number of reactions. In the present work, α- γ-zirconium (α- γ-ZrP) were prepared evaluated esterification reactions levulinic acid (LA) with ethanol (EtOH) or methanol (MeOH) using conventional reflux method (CV) microwave assisted (MW). The best selectivities for ethyl methyl levulinates conversions LA achieved γ-ZrP MW are strongly related properties structure this catalyst used. Two intermediates, 5-ethoxy-5-methyldihydrofuran-2-one also designated by pseudo-ethyl levulinate (pseudo-EL) 5-methoxy-5-methyldihydrofuran-2-one pseudo-methyl (pseudo-ML) formed.

Язык: Английский

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Production of butyl levulinate from the solvolysis of high-gravity fructose over heterogeneous catalyst: In-depth kinetic modeling

Chemical Engineering Journal, Год журнала: 2023, Номер 465, С. 142914 - 142914

Опубликована: Апрель 11, 2023

Язык: Английский

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Insights on butyl levulinate bio-blendstock: From model sugars to paper mill waste cellulose as feedstocks for a sustainable catalytic butanolysis process

Catalysis Today, Год журнала: 2023, Номер 418, С. 114054 - 114054

Опубликована: Фев. 22, 2023

Butyl levulinate (BL) represents a novel diesel bio-blendstock and versatile intermediate solvent. The one-pot acid-catalyzed conversion of C6-feedstocks, employing n-butanol as the solvent/reagent, implies upgrading low-cost or, even better, waste biomasses for developing prompt process intensification. In this paper, butanolysis has been studied, moving from model glucose microcrystalline cellulose to feedstock deriving real papermaking process. performances obtained with biomass have optimized, achieving BL yields up 46 mol %, adopting high-gravity approach, in presence diluted sulfuric acid catalyst. optimization was carried out also perspective minimizing alcohol etherification dibutyl ether, carbonization char by-product, whose characterization performed identify its suitable applications. combined production both valuable bio-fuel an exploitable carbonaceous bio-material can pave way development cellulosic or lignocellulosic environmentally sustainable integrated perspective, agreement principles circular bio-economy.

Язык: Английский

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Levulinic Acid Esterification with n-Butanol over a Preyssler Catalyst in a Microwave-Assisted Batch Reactor: A Kinetic Study

Industrial & Engineering Chemistry Research, Год журнала: 2023, Номер 62(28), С. 10915 - 10929

Опубликована: Июль 5, 2023

A Preyssler-type heteropolyacid supported on silica, synthesized and characterized by FTIR, was tested for levulinic acid (LA) esterification with n-butanol under microwave-assisted batch reaction conditions. The optimal conditions were found to be 40 mg of catalyst, a 5:1 n-butanol/LA molar ratio at 160 °C 3 h, resulting in 77% conversion 100% selectivity. catalytic effect observed low temperatures (100 °C), the microwave high (160 °C). Yield levulinate improved (82%) CuSO4 as dehydrating agent. kinetic study using pseudohomogeneous reversible model (PH, EForward = 31.60 kJ mol–1 EReverse 11.53 mol–1) Eley–Rideal (ER, E 31.06 provided best fitting experimental data. Preyssler-based catalyst has potential sustainable synthesis n-butyl levulinate, promising fuel additive can used least five times without loss activity.

Язык: Английский

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From biomass-derived fructose to γ-valerolactone: Process design and techno-economic assessment

Bioresource Technology, Год журнала: 2024, Номер 401, С. 130753 - 130753

Опубликована: Апрель 28, 2024

Язык: Английский

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Synthesis of carrageenan/DFNS composite and its application in the esterification of levulinic acid and alcohols

Inorganic Chemistry Communications, Год журнала: 2024, Номер 169, С. 113054 - 113054

Опубликована: Авг. 28, 2024

Язык: Английский

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The Chemistry of Levulinic Acid: Its Potential in the Production of Biomass‐based Chemicals

Advanced Synthesis & Catalysis, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 1, 2024

Abstract Biomass has been identified as the ultimate sustainable resource for all carbon‐based consumer products of chemical industries in future. Its catalytic conversion leads to formation various platform chemicals that could partially or even fully replace fossil‐based building blocks have currently used synthetic processes. Among these compounds, levulinic acid (LA) recognized a member “Top Value Added Chemicals from Biomass” and attracted significant attention since seminal paper reported by Werpy Petersen 2004. This review summarizes properties, recent advances, developments chemistry acid. The production LA both plant animal‐based carbohydrate feedstocks via 5‐hydroxymethylfurfural furfuryl alcohol is discussed mechanistic perspective, highlighting intrinsic molecular‐level limitations formation. efficiencies recently developed systems are also summarized compared. Furthermore, into high‐value‐added downstream chemicals, including its role synthesis complex molecular structures, overviewed. section reactions points view transformations on carbonyl‐, carboxy‐, methyl‐, methylene functional groups. functionalities with C −, N O S ‐nucleophiles, alcohols, amines, organometallic reagents, oxygen etc. were thematically summarized. Our outlooks highlight challenges opportunities associated extensive research area organic

Язык: Английский

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Upgradation of hemicellulose-derived furfuryl alcohol to butyl levulinate by using magnetic acidic deep eutectic solvents as catalysts

Catalysis Today, Год журнала: 2025, Номер unknown, С. 115276 - 115276

Опубликована: Март 1, 2025

Язык: Английский

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