Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
Publication date: 18th December 2023
Nowadays, the reduction of the carbon footprint has become a significant concern, which can be achieved, amid different strategies, through CO2 reduction, which mitigates greenhouse gas emissions and produces value-added chemicals and fuels. Developing an effective catalyst for this purpose is vital, as there are currently no industrial-scale operations with this technology due to its low energetic efficiency.1-2
Recently, there has been a growing interest in using biomass as a source of carbonaceous materials for catalysts synthesis due to its abundance, accessibility, and recyclability.3 Almond shells are one of the biggest available biomass resources in Spain. They are approximately composed of 40%, 30% and 30% of cellulose, hemicellulose, and lignin, respectively. This study aims to synthesize ordered mesoporous carbons (OMCs) using the compounds extracted from almond shells as carbon precursors and employing SBA-15 as a template.
Lignin and xylose extracted from almond shells using microwaves, as well as commercial glucose and xylose, were impregnated into pre-synthesized SBA-15. Samples were carbonized under a nitrogen flow at 650 ºC and 900 ºC, followed by the removal of the template. OMCs were successfully obtained since all samples showed the 100-diffraction peak and, in some cases the 110 and 200 diffraction peaks corresponding to the inverse structure of SBA-15 as confirmed by TEM in which the ordered mesoporous channels were perfectly observed.
This work was supported by the project PID2019-110735RB-C22 funded by MCIN/AEI/ 10.13039/501100011033. J. Lozano thanks to URV for the 2022PMF-INV-4 grant.
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