Oxidative upgrade of furfural to succinic acid using SOH-carbocatalysts with nitrogen functionalities based on polybenzoxazine.

07:00 EST 3rd January 2020 | BioPortfolio

Summary of "Oxidative upgrade of furfural to succinic acid using SOH-carbocatalysts with nitrogen functionalities based on polybenzoxazine."

SOH-carbocatalysts with nitrogen functionalities were prepared using the carbonization of polybenzoxazine derived from four different amines (aniline, ethylenediamine, triethylenetetramine, and tetraethylenepentamine) and then sulfonation. The obtained SOH-carbocatalysts underwent catalytic testing for furfural oxidation with HO to produce succinic acid. The effects of nitrogen functionalities were reported for the first time. The results showed that all carbon samples exhibited a microporous characteristic with comparable textural properties and contained various nitrogen functionalities (N-6, N-5, N-Q, and N-X). After sulfonation, the SOH-carbocatalyst prepared from tetraethylenepentamine-based polybenzoxazine had the highest amount of sulfonic acid groups (1.45 mmol g) and a high nitrogen content (4.23%), providing a maximum succinic acid yield of 93.0% within a rapid reaction time of 60 min under the optimized conditions. This was higher than from Amberlyst-type catalysts and SOH-carbocatalyst without nitrogen functionalities and was ascribed to the synergistic activity of the sulfonic acid groups and nitrogen functionalities. The XPS spectra and computational study confirmed that such nitrogen functionalities, especially N-5, are capable of forming hydrogen bonding with furfural, facilitating the formation of an intermediate compound and thereby enhancing the catalytic efficiency. However, after four cycles, the succinic acid yield decreased to 40% due to leaching of the sulfonic acid groups.


Journal Details

This article was published in the following journal.

Name: Journal of colloid and interface science
ISSN: 1095-7103
Pages: 96-109


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