Carbon-Based Catalysts from H3PO4 Activation of Olive Stones for Sustainable Solketal and γ-Valerolactone Production DOI Open Access
Javier Torres-Liñán, Miguel García-Rollán, Ramiro Ruíz-Rosas

et al.

Catalysts, Journal Year: 2024, Volume and Issue: 14(12), P. 869 - 869

Published: Nov. 28, 2024

The use of activated carbon-based catalysts for the production solketal and γ-valerolactone (GVL), two products interest biorefinery processes, was investigated. Activated carbons (ACs) were prepared by chemical activation olive stones, an agricultural byproduct, using H3PO4 to stone mass impregnation ratios (IRs) 1:1 3:1, under nitrogen or air atmosphere. ACs showed SBET values 1130–1515 m2/g, owing presence micropores (0.45–0.60 cm3/g). IR 3:1 delivered a wider pore size distribution, with mesopore volume increasing up 1.36 cm3/g. XPS confirmed phosphorus groups surface concentrations 2.2–3.2 wt% strongly bonded AC through C-O-P bonds. tested as acid acetalization glycerol in stirred batch reactor at temperatures 30–50 °C, 1.5 3.4 mol/L, 1–3 catalytic loading. activity clearly correlated quantity determined TPD, which increased when achieved full selectivity solketal, energy 49 kJ/mol conversion 70%, matching equilibrium value optimum reaction conditions. A bifunctional catalyst over this deposition 5 zirconium hydrogenation levulinic (LA) isopropyl alcohol (IPA) solvent H2 donor, LA:IPA from 1:7 between 160–200 °C. reached LA GVL yield higher than 80% after only 12 h 200 test conducted water revealed that it inhibitor reaction. identification levulinate intermediate suggests most likely pathway dehydration, followed cyclization, obtain GVL. Kinetic modelling results 42 step. reusability five consecutive cycles, maintaining towards

Language: Английский

Production of γ-Valerolactone from levulinic acid via selected transfer hydrogenation pathway by FeAl-framework ZSM-5 supporting ZrO2 DOI
Xiaozhou Chen, Hailong Tian,

Longbin Deng

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160796 - 160796

Published: Feb. 1, 2025

Language: Английский

Citations

0
A Review on Zeolites for Adsorptive Desulfurization of Crude Oil and Natural Gas: Kinetics, Isotherms, and Thermodynamics Studies DOI

Zaharaddeen N. Garba,

Zakariyya Uba Zango, Haruna Adamu

et al.

Deleted Journal, Journal Year: 2025, Volume and Issue: unknown, P. 100063 - 100063

Published: March 1, 2025

Language: Английский

Citations

0
Minimizing Energy Demand in the Conversion of Levulinic Acid to γ‑Valerolactone via Photothermal Catalysis Using Raney Ni DOI Creative Commons
Roger Bujaldón, Arnau Fons, Jaume García‐Amorós

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Abstract The valorization of lignocellulosic wastes emerges as a prime strategy to mitigate the global carbon footprint. Among multiple biomass derivatives, γ‐valerolactone is particularly attractive precursor high‐value chemicals, biofuel, green solvent or perfumery. γ‐Valerolactone can be synthesized through hydrogenation reaction from levulinic acid, obtained cellulose. However, high energy requirements this synthetic pathway have hindered its industrial viability. To drastically reduce requirements, here novel strategy, based on solvothermal‐photothermal processes using cost‐effective Raney‐Ni photothermal catalyst, proposed. First, use hydrogen gas avoided by selecting isopropanol safer and greener H‐source. Second, photothermocatalytic process used minimize temperature time with respect conventional reactions. This approach exploits broadband optical absorption Raney®‐Ni, due highly damped plasmonic behavior, achieve fast efficient catalyst heating inside reactor. required less than 2 h just 132 °C reach over 95% conversion, thereby reducing consumption compared Importantly, these conditions granted reusability. could offer sustainable alternative for production γ‐valerolactone.

Language: Английский

Citations

0
Zirconium Phosphate-Pillared Zeolite MCM-36 for Green Production of γ-Valerolactone from Levulinic Acid via Catalytic Transfer Hydrogenation DOI Creative Commons

Pan Hou,

Haopeng Su,

Keyan Jin

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(16), P. 3779 - 3779

Published: Aug. 9, 2024

γ-valerolactone (GVL), derived from biomass, is a crucial platform compound for biofuel synthesis and various industrial applications. Current methods synthesizing GVL involve expensive catalysts high-pressure hydrogen, prompting the search greener alternatives. This study focuses on novel zirconium phosphate (ZrP)-pillared zeolite MCM-36 derivative catalyst converting levulinic acid (LA) to using alcohol as hydrogen source. The incorporation of ZrP significantly contributes mesoporosity greatly enhances acidity catalysts. Additionally, we employed 31P MAS NMR comprehensively investigate influence phosphorus species both catalytic conversion LA GVL. By adjusting Zr-to-P ratios, synthesized with enhanced acidity, achieving high selectivity exhibited recyclability, showing only minor deactivation over course five cycles. Furthermore, was successfully applied one-pot furfural GVL, showcasing its versatility in biomass conversion. highlights potential MCM-ZrP1 sustainable offers insights future research renewable energy technologies.

Language: Английский

Citations

0
Carbon-Based Catalysts from H3PO4 Activation of Olive Stones for Sustainable Solketal and γ-Valerolactone Production DOI Open Access
Javier Torres-Liñán, Miguel García-Rollán, Ramiro Ruíz-Rosas

et al.

Catalysts, Journal Year: 2024, Volume and Issue: 14(12), P. 869 - 869

Published: Nov. 28, 2024

The use of activated carbon-based catalysts for the production solketal and γ-valerolactone (GVL), two products interest biorefinery processes, was investigated. Activated carbons (ACs) were prepared by chemical activation olive stones, an agricultural byproduct, using H3PO4 to stone mass impregnation ratios (IRs) 1:1 3:1, under nitrogen or air atmosphere. ACs showed SBET values 1130–1515 m2/g, owing presence micropores (0.45–0.60 cm3/g). IR 3:1 delivered a wider pore size distribution, with mesopore volume increasing up 1.36 cm3/g. XPS confirmed phosphorus groups surface concentrations 2.2–3.2 wt% strongly bonded AC through C-O-P bonds. tested as acid acetalization glycerol in stirred batch reactor at temperatures 30–50 °C, 1.5 3.4 mol/L, 1–3 catalytic loading. activity clearly correlated quantity determined TPD, which increased when achieved full selectivity solketal, energy 49 kJ/mol conversion 70%, matching equilibrium value optimum reaction conditions. A bifunctional catalyst over this deposition 5 zirconium hydrogenation levulinic (LA) isopropyl alcohol (IPA) solvent H2 donor, LA:IPA from 1:7 between 160–200 °C. reached LA GVL yield higher than 80% after only 12 h 200 test conducted water revealed that it inhibitor reaction. identification levulinate intermediate suggests most likely pathway dehydration, followed cyclization, obtain GVL. Kinetic modelling results 42 step. reusability five consecutive cycles, maintaining towards

Language: Английский

Citations

0