Selective conversion of biomass-derived levulinic acid to ethyl levulinate catalyzed by metal organic framework (MOF)-supported polyoxometalates

Guo, Tian-Meng; Qiu, Mo; Qi, Xinhua

doi:10.1016/j.apcata.2019.01.004

Cited by 61 publications

(28 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Se comprobó por CG-masa la existencia de un producto secundario (-angélica lactona), proveniente de la deshidratación del AL. Los mejores resultados se obtuvieron con la muestra M100% U-T. Estas reacciones de esterificación se dan mediante un mecanismo de activación dual ácido-base, en el que los sitios Zr interactúan con él AL adsorbido mientras que el grupo amino, cerca del Zr, forma un aducto unido al hidrógeno en la molécula de alcohol, lo que aumenta el carácter nucleófilo del átomo de O favoreciendo el primer paso de reacción (Liang et al, 2020;Cirujano et al, 2015;Syahirah et al, 2017;Di et al, 2019;Guo et al, 2019).…”

Section: Evaluación Catalíticaunclassified

UiO-66-NH_2 para la obtención de ésteres levulínicos derivados de biomasa

Crivello¹,

Heredia²,

Castellón³

2020

AJEA

View full text Add to dashboard Cite

Como resultado de la explotación masiva del petróleo y su agotamiento, el estudio de materias primas alternativas para reacciones orgánicas provenientes de la biomasa, es una tendencia de investigación en la actualidad. En este contexto, el presente trabajo plantea la obtención de metil y etil levulinato mediante la reacción catalítica de esterificación del ácido levulínico como molécula plataforma, con metanol y etanol. El catalizador utilizado es el MOF UiO-66-NH2, constituido por circonio como precursor metálico y ácido aminotereftálico como agente ligante orgánico. Se presenta una vía de síntesis con condiciones ambientales y económicas más favorables, utilizándose solventes alternativos. Se planteó el remplazo de la tradicional dimetilformamida (DMF), usada en la síntesis solvotermal, por un 50% v/v de acetona. Además, las síntesis se realizaron con agitación por vía magnética y ultrasónica, buscando mejorar las propiedades estructurales de los catalizadores. Para comprender la estructura cristalina, morfología y porosidad, los materiales se analizaron por difracción de rayos X, microscopía electrónica de barrido, espectroscopia infrarroja, espectroscopía fotoelectrónica de rayos X, espectroscopia de emisión atómica por plasma de microondas, medición de acidez y adsorción de N2. El progreso de la reacción catalítica fue seguido por cromatografía gaseosa y espectroscopía de masa. Dentro de los materiales sintetizados, el que presentó la mayor actividad, fue el obtenido con un 100% de DMF mediante la síntesis con ultrasonido. La conversión fue del 63,57% para el levulinato de metilo y del 38,69% para el levulinato de etilo.

show abstract

Section: Evaluación Catalíticaunclassified

UiO-66-NH_2 para la obtención de ésteres levulínicos derivados de biomasa

Crivello¹,

Heredia²,

Castellón³

2020

AJEA

View full text Add to dashboard Cite

show abstract

“…Considerable strategies were adopted to overcome these drawbacks. Among them, transition metals substitution was proven to effectively decrease their water solubility and enhance their reusability [ 17 , 18 , 19 , 20 , 21 ]. Immobilization of POMs on the supporters were also proven effective to enhance their performances, while different materials which include mesoporous silica, metal-organic frameworks (MOFs), metal oxides, and carbon materials were employed as supporters [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

“…Xu et al employed cesium substituted heterogeneous polyoxometalates as catalysts to improve birch lignin depolymerization in a mixture of CH 3 OH and H 2 O 2 (4:1, v / v ), and found that the catalyst was easily separated from products and possessed perfect reusability [ 17 ]. Ru/POM nanocatalyst also displayed high activity and selectivity in oxidative depolymerization and could be recovered easily [ 18 ]. Keggin-type polyoxometalate-supported Au nanoparticles were conducted as catalysts to converse cellobiose into gluconic acid in the presence of O 2 when the highest cellobiose conversion and gluconic acid selectivity were ≥95% and 85%, respectively [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Magnetic Catalyst Fe3O4-SiO2-V3 and Its Application on Lignin Extraction from Corncob in Deep Eutectic Solvent

et al. 2021

View full text Add to dashboard Cite

Fe3O4-SiO2-V3 was prepared by deposited H6PMo9V3O40 on Fe3O4-SiO2 and employed as a catalyst to extract lignin from corncob in deep eutectic solvent (choline chloride/lactic acid = 1/10). Batch experiments were conducted in an autoclave under the conditions of 500 kPa, 90–130 °C and 15 h, while the dosage of the catalyst was set as a variable. Results indicated that the catalyst could effectively improve the qualities of the lignin, while the characteristics of the lignin showed prominent changes with the participation of the catalyst: the extraction rate increased from 71.65% to 98.13%, the purity was improved from 85.62% to 97.09%, and both the number average molecular weight and the weight average molecular weight also decreased significantly. Besides, the molecular distribution of the lignin achieved from the CC-LA-Fe-Si-V3 reaction system was found to be more highly concentrated (Polydispersity index = 1.746). Results from 2D NMR HSQC analysis indicated that lignin fractions achieved from the CC-LA-Fe-Si-V3 system showed distinct destruction involving C2-H2 in guaiacyl units (G), C5-H5 in guaiacyl units (G), and the Cγ-Hγ in γ-hydroxylated β-O-4′ substructures, but little changes in the Cγ-Hγ in phenylcoumaran substructures.

show abstract

“…is concern is an irritation for the researchers for renewable and replaces sustainable resources instead of non-renewable fossil-based fuels. Because biomass is a green, highly abundant, and carbon-natural process available, it is served as a promising and replacing one to be transformed through bio-refinery and catalytic valorization into an extensive series of valueadded chemicals, which has a relatively low impact on the environment [3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Functionalized Metal-Organic Framework Catalysts for Sustainable Biomass Valorization

Liu

Wang

2020

Advances in Polymer Technology

View full text Add to dashboard Cite

Currently, pristine and functionalized metal-organic frameworks (MOFs) are introduced in heterogeneous catalysis for biomass upgrading owing to the specific texture properties including regular higher-order structure, high specific surface area, and the precisely tailored diversity. The purpose of this review is to afford a comprehensive discussion of the most applications in biomass refinery. We highlight recently developed four types of MOFs like pristine MOFs and their composites, MOF-supported metal NPs, acid-functionalized MOFs, and biofunctionalized MOFs for production of green, sustainable, and industrially acceptable biomass-derived platform molecules: (1) upgrading of saccharides, (2) upgrading of furan derivatives, and (3) upgrading of other biobased compounds.

show abstract

Selective conversion of biomass-derived levulinic acid to ethyl levulinate catalyzed by metal organic framework (MOF)-supported polyoxometalates

Cited by 61 publications

References 41 publications

UiO-66-NH_2 para la obtención de ésteres levulínicos derivados de biomasa

UiO-66-NH_2 para la obtención de ésteres levulínicos derivados de biomasa

Fabrication of Magnetic Catalyst Fe3O4-SiO2-V3 and Its Application on Lignin Extraction from Corncob in Deep Eutectic Solvent

Functionalized Metal-Organic Framework Catalysts for Sustainable Biomass Valorization

Contact Info

Product

Resources

About