SBA-15 supported Ni-Cu catalysts for hydrodeoxygenation of m-cresol to toluene - Unité de Chimie Environnementale et Interactions sur le vivant
Article Dans Une Revue ChemSusChem Année : 2024

SBA-15 supported Ni-Cu catalysts for hydrodeoxygenation of m-cresol to toluene

Résumé

Amidst concerns over fossil fuel dependency and environmental sustainability, the utilization of biomass-derived aromatic compounds emerges as a viable solution across diverse industries. In this scheme, the conversion of biomass involves pyrolysis, followed by a hydrodeoxygenation (HDO) step to reduce the oxygen content of pyrolysis oils and stabilize the end products including aromatics. In this study, we explored the properties of size controlled NiCu bimetallic catalysts supported on ordered mesoporous silica (SBA-15) for the catalytic gas-phase HDO of m-cresol, a lignin model compound. We compared their performances with monometallic Ni and Cu catalysts. The prepared catalysts contained varying Ni to Cu ratios and featured an average particle size of approximately 2 nm. The catalytic tests revealed that the introduction of Cu alongside Ni enhanced the selectivity for the direct deoxygenation (DDO) pathway, yielding toluene as the primary product. Optimal performance was observed with a catalyst composition comprising 5 wt.% Ni and 5 wr.% Cu, achieving 85 % selectivity to toluene. Further increasing the Cu content improved turnover frequency (TOF) values, but reduced DDO selectivity. These findings underscore the importance of catalyst design in facilitating biomass-derived compound transformations and offer insights into optimizing catalyst composition for more selective HDO reactions.

Domaines

Catalyse
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mardi 14 janvier 2025
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Dates et versions

hal-04676105 , version 1 (23-08-2024)

Identifiants

Citer

Roger Deplazes, Camila Abreu Teles, Carmen Ciotonea, Pardis Simon, Elias El Rassi, et al.. SBA-15 supported Ni-Cu catalysts for hydrodeoxygenation of m-cresol to toluene. ChemSusChem, 2024, ChemSusChem, pp.e202400685. ⟨10.1002/cssc.202400685⟩. ⟨hal-04676105⟩
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