Continuous flow hydrogenolysis of 5-hydroxymethylfurfural into 2,5-dimethylfuran over alumina-supported nickel-iron alloy catalysts
Issued Date
2023-01-11
Resource Type
eISSN
23984902
Scopus ID
2-s2.0-85147219989
Journal Title
Sustainable Energy and Fuels
Volume
7
Issue
4
Start Page
934
End Page
948
Rights Holder(s)
SCOPUS
Bibliographic Citation
Sustainable Energy and Fuels Vol.7 No.4 (2023) , 934-948
Suggested Citation
Kalong M., Srifa A., Ratchahat S., Koo-Amornpattana W., Poo-Arporn Y., Limphirat W., Khemthong P., Assabumrungrat S., Tomishige K., Kawi S. Continuous flow hydrogenolysis of 5-hydroxymethylfurfural into 2,5-dimethylfuran over alumina-supported nickel-iron alloy catalysts. Sustainable Energy and Fuels Vol.7 No.4 (2023) , 934-948. 948. doi:10.1039/d2se01683d Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/82944
Title
Continuous flow hydrogenolysis of 5-hydroxymethylfurfural into 2,5-dimethylfuran over alumina-supported nickel-iron alloy catalysts
Other Contributor(s)
Abstract
Catalytic transformation of furan derivatives into the next generation of biofuels in a continuous operation is a promising platform for application in sustainable biorefining. In this study, as-synthesized γ-Al2O3 supported-NiFe catalysts with different Ni to Fe molar ratios were applied for the continuous hydrogenolysis of 5-hydroxymethylfurfural (5-HMF) to 2,5-dimethylfuran (2,5-DMF). The Ni to Fe molar ratio of 0.74 : 0.97 revealed the highest yield of 2,5-DMF in comparison to monometallic NiAl and FeAl catalysts. The comprehensive characterizations disclosed that Ni added into Fe/Al2O3 catalysts alleviated the metal and supported the interactions and reduction behavior; however, the number of acidic sites was increased by the Ni species. The in situ XANES experiments confirmed the coexistences of major amounts of metallic Ni and Fe with minor amounts of NiO and FeOx species in the bimetallic Ni0.74Fe0.97Al catalyst, while the alloy NiFe structure was noticed in the XRD analysis. Additionally, the time-resolved XANES investigations elucidated the evolution of the catalyst structure's transformation during the H2-reduction process. Under the optimizing conditions of weight hourly space velocity (WHSV), the reaction temperature, and the hydrogen pressure, the Ni0.74Fe0.97Al catalyst gave a maximum 90.5% yield of 2,5-DMF with 100% 5-HMF conversion at a reaction temperature of 160 °C, H2 pressure of 40 bar, and WHSV of 0.3 h−1. The possible reaction mechanism was explained in detail based on the structural characterizations and major product distributions.