Elucidating the Role of Addenda and Hydrogen Atoms on the Acidity of Heteropolyacid to Produce Butyl Levulinate as a Green Diesel Additive DOI
Khwaja Alamgir Ahmad, Hussein Znad, Ejaz Ahmạd

и другие.

Advanced Sustainable Systems, Год журнала: 2024, Номер unknown

Опубликована: Дек. 30, 2024

Abstract The present study explores the synthesis of butyl levulinate (BL), a green diesel additive, using vanadium‐incorporated Keggin phosphomolybdic acid (HPVM) catalysts. This highlights effect addenda and hydrogen atoms on HPVM catalysts for BL production, thereby elucidating correlation between atoms, acidity, yield. are characterized Raman spectroscopy, FTIR, XRD, ammonia‐TPD, SEM‐EDX, ICP‐OES techniques to determine their structural properties, elemental composition. Reaction parameters, including time, temperature, catalyst concentration, stirring rate, solvent volume, systematically evaluated optimize conversion levulinic (LA) BL. A significant yield (>96%) is obtained 25 wt.% H 4 PMo 11 VO 40 (H PVM) at 100 °C in min. Kinetic analysis unveiled pseudo‐first‐order reaction mechanism with activation energies 66.73, 68.81, 71.19 kJ.mol −1 PVM), 5 10 V 2 O 6 9 3 catalysts, respectively. Additionally, thermodynamic such as enthalpy (ΔH*), entropy (ΔS*), Gibbs free energy (ΔG*), determined. Overall, this complex interplay energy, yield, emphasizing significance number vanadium performance.

Язык: Английский

Production of alkyl levulinates as a versatile precursor by phosphomolybdate-impregnated g-C3N4 catalysts DOI
Nazanin Orash, Alireza Najafi Chermahini, Rafael Luque

и другие.

Journal of Industrial and Engineering Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Июнь 1, 2024

Язык: Английский

Процитировано

1

Sustainable Exploitation of Posidonia oceanica Balls through an Integrated Biorefinery Approach DOI
Sara Fulignati, Anna Maria Raspolli Galletti,

Francesca Barsotti

и другие.

ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 13(1), С. 91 - 104

Опубликована: Дек. 20, 2024

This work proposes the integrated exploitation of fibrous balls seagrass Posidonia oceanica (PO), which annually accumulate along sandy Mediterranean beaches, causing significant management and economic problems. Preliminarily, organic extractives PO were removed by ethanol, their characterization highlighted presence biologically active molecules. The successive alkaline pretreatment allowed fractionation biomass, leading to a solid enriched in polysaccharides "black liquor" containing extracted lignin. butanolysis provided yield up 52.3 mol % butyl levulinate, strategic intermediate, valuable bioblendstock for diesel. Finally, pure acid-insoluble lignin acid-soluble fractions recovered from liquor". These deeply characterized proposed as UV-blocker antioxidant agents.

Язык: Английский

Процитировано

0

Elucidating the Role of Addenda and Hydrogen Atoms on the Acidity of Heteropolyacid to Produce Butyl Levulinate as a Green Diesel Additive DOI
Khwaja Alamgir Ahmad, Hussein Znad, Ejaz Ahmạd

и другие.

Advanced Sustainable Systems, Год журнала: 2024, Номер unknown

Опубликована: Дек. 30, 2024

Abstract The present study explores the synthesis of butyl levulinate (BL), a green diesel additive, using vanadium‐incorporated Keggin phosphomolybdic acid (HPVM) catalysts. This highlights effect addenda and hydrogen atoms on HPVM catalysts for BL production, thereby elucidating correlation between atoms, acidity, yield. are characterized Raman spectroscopy, FTIR, XRD, ammonia‐TPD, SEM‐EDX, ICP‐OES techniques to determine their structural properties, elemental composition. Reaction parameters, including time, temperature, catalyst concentration, stirring rate, solvent volume, systematically evaluated optimize conversion levulinic (LA) BL. A significant yield (>96%) is obtained 25 wt.% H 4 PMo 11 VO 40 (H PVM) at 100 °C in min. Kinetic analysis unveiled pseudo‐first‐order reaction mechanism with activation energies 66.73, 68.81, 71.19 kJ.mol −1 PVM), 5 10 V 2 O 6 9 3 catalysts, respectively. Additionally, thermodynamic such as enthalpy (ΔH*), entropy (ΔS*), Gibbs free energy (ΔG*), determined. Overall, this complex interplay energy, yield, emphasizing significance number vanadium performance.

Язык: Английский

Процитировано

0