TY - JOUR
T1 - Conversion of levulinic acid over rhenium oxide catalysts
T2 - Effect of metal content
AU - Bassi, R.
AU - Baeza, P.
AU - Sepulveda, C.
AU - Ghampson, I. T.
AU - Camu, E.
AU - Brückner, A.
AU - Bentrup, U.
AU - Fierro, J. L.G.
AU - Escalona, N.
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/9/5
Y1 - 2021/9/5
N2 - The conversion of levulinic acid over rhenium oxide catalysts supported on ZrO2 and SiO2 in a batch reactor at 200 °C and 5 MPa of H2 pressure was studied. The catalysts were prepared by incipient wetness impregnation with nominal loadings of 5–18 wt.%. The catalysts were characterized by N2 physisorption, field emission scanning electron microscopy, X-ray diffraction, H2-temperature programmed reduction, Fourier transform infrared spectroscopy of adsorbed pyridine, and X-ray photoelectron spectroscopy. The catalysts were highly active and selective to γ-valerolactone. Catalytic activity, expressed as initial reaction rate and based on catalyst weight, was correlated with dispersion. The difference in the activity trend was attributed to ReOx-support interaction: ZrO2 interacted more strongly with ReOx and modified the electronic character of the sites, whereas SiO2 interacted weakly with ReOx, leading to unmodified Re active sites, irrespective of Re loading. All the catalysts exceeded 90 % selectivity to GVL.
AB - The conversion of levulinic acid over rhenium oxide catalysts supported on ZrO2 and SiO2 in a batch reactor at 200 °C and 5 MPa of H2 pressure was studied. The catalysts were prepared by incipient wetness impregnation with nominal loadings of 5–18 wt.%. The catalysts were characterized by N2 physisorption, field emission scanning electron microscopy, X-ray diffraction, H2-temperature programmed reduction, Fourier transform infrared spectroscopy of adsorbed pyridine, and X-ray photoelectron spectroscopy. The catalysts were highly active and selective to γ-valerolactone. Catalytic activity, expressed as initial reaction rate and based on catalyst weight, was correlated with dispersion. The difference in the activity trend was attributed to ReOx-support interaction: ZrO2 interacted more strongly with ReOx and modified the electronic character of the sites, whereas SiO2 interacted weakly with ReOx, leading to unmodified Re active sites, irrespective of Re loading. All the catalysts exceeded 90 % selectivity to GVL.
KW - Biomass
KW - Levulinic acid
KW - Rhenium oxide catalysts
KW - γ-Valerolactone
UR - http://www.scopus.com/inward/record.url?scp=85113531228&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2021.118328
DO - 10.1016/j.apcata.2021.118328
M3 - Review article
AN - SCOPUS:85113531228
SN - 0926-860X
VL - 625
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
M1 - 118328
ER -