resumo
The hydrogenation of furfural by catalytic hydrogen transfer to produce furfuryl alcohol has been investigated over a series of mixed oxides derived from hydrotalcite catalysts. Three different catalysts containing Ni, Co and Zn phases on an Al-rich amorphous support were synthesized and characterised. The catalytic performances were evaluated in a batch stirred reactor using 2-propanol as a solvent and hydrogen donor, with Co3O4-Al2O3 showing the highest activity and selectivity to FA (74 % yield; 97 % selectivity). The effects of temperature (T=120-180 degrees C) and reaction time (t=30 min-24 h) were also studied, reaching a FA maximum yield of 92 % at 150 degrees C after 24 h. The Co3O4-Al2O3 catalyst showed a loss of activity after the first run, which can be easily restored by a simple calcination treatment. The results establish a catalytic route to produce valuable furfuryl alcohol over 3d-transition metal-based catalysts without any external hydrogen supply.
palavras-chave
LAYERED DOUBLE HYDROXIDES; LIGNOCELLULOSIC BIOMASS; FORMIC-ACID; LEWIS-ACID; ALCOHOL; CU; CONVERSION; PLATFORM; ISOPROPANOL; CONDENSATION
categoria
Chemistry
autores
Ramos, R; Peixoto, AF; Arias-Serrano, BI; Soares, OSGP; Pereira, MFR; Kubicka, D; Freire, C
Grupos
agradecimentos
This work was funded by Fundacao para a Ciencia e a Tecnologia FCT/MCTES through national funds, projects: UID/QUI/50006/2019, PTDC/BII-BIO/30884/2017 and UID/EQU/50020/2019. RRV thanks the project PTDC/BII-BIO/30884/2017 contract based on DL57/2016 funded by FCT/MCTES through national funds. AFP thanks FCT/MCTES for their work contract (in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19) supported by national funds (OE).