The influence of catalyst structure on acidic strength of –SO3H groups for alkyl levulinate synthesis from biomass–derived feedstocks using sulfonic acid functionalized flexible MOF catalyst

Vaishnavi, B.J.; Rajashekhar Vaibhava, K.M.; Sujith, S.; Harsha, M.; Meghana, A.; Vetrivel, Rajappan; Shanbhag, Ganapati V.

doi:10.1016/j.cej.2024.151724

Chemical Engineering Journal

2024

DOI: 10.1016/j.cej.2024.151724

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The influence of catalyst structure on acidic strength of –SO3H groups for alkyl levulinate synthesis from biomass–derived feedstocks using sulfonic acid functionalized flexible MOF catalyst

B.J. Vaishnavi,

K.M. Rajashekhar Vaibhava,

S. Sujith

et al.

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2024

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Cited by 2 publications

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A type of polyaniline with H+ reservoirs for dual-mechanism NH4+ and I3−/I2 storage

Zhi,

Jin,

Zhang

et al. 2024

Chemical Engineering Journal

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A type of polyaniline with H+ reservoirs for dual-mechanism NH4+ and I3−/I2 storage

Zhi,

Jin,

Zhang

et al. 2024

Chemical Engineering Journal

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Amine-Modulated Lanthanum-Based Metal–Organic Frameworks for Levulinic Acid Conversion to Alkyl Levulinate

Pradeepan,

Anjali,

Nishimura

2024

Ind. Eng. Chem. Res.

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Lanthanide metal–organic frameworks (Ln-MOFs) have attracted considerable interest in heterogeneous catalysis due to their tunable channel sizes, stable network structures, and diverse active sites. Here, a series of lanthanum (La)-based MOFs were synthesized in the presence of various amine modulators of ethylene diamine (ED), 1,4-diazabicyclo[2.2.2]octane (DABCO), butylamine (BA), triethylamine (TEA), and heptylamine (HA) under identical conditions. These modulators play a crucial role in both the nucleation and growth processes of the La-MOFs. The impact of these modulators on crystallinity, porosity, acidity, thermal stability, bonding, morphology, and oxidation state of the metal was investigated. Textural analysis confirmed that the MOFs possess identical crystalline structures but different morphologies. The catalytic performance of the as-prepared La-MOF catalysts was evaluated for levulinic acid (LA) esterification. La-MOF-DABCO exhibited the highest yield, producing 92% ethyl levulinate (EL) in 2 h at 190 °C. Kinetic parameters indicated an activation energy of 20.7 kJ mol–1 and a reaction order of 0.5 with respect to LA. Thermodynamic analysis classified the reaction as endergonic, nonspontaneous, and more ordered. The study illuminated the influence of Brønsted–Lewis acid sites of La-MOF on catalytic esterification, highlighting a modulator-driven approach to MOF synthesis and its potential in heterogeneous catalysis. These findings offer insights for modeling and simulation studies in industrial applications.

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The influence of catalyst structure on acidic strength of –SO3H groups for alkyl levulinate synthesis from biomass–derived feedstocks using sulfonic acid functionalized flexible MOF catalyst

Cited by 2 publications

References 94 publications

A type of polyaniline with H+ reservoirs for dual-mechanism NH4+ and I3−/I2 storage

A type of polyaniline with H+ reservoirs for dual-mechanism NH4+ and I3−/I2 storage

Amine-Modulated Lanthanum-Based Metal–Organic Frameworks for Levulinic Acid Conversion to Alkyl Levulinate

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