首页|Sustainable metal-lignosulfonate catalyst for efficient catalytic transfer hydrogenation of levulinic acid to gamma-valerolactone
Sustainable metal-lignosulfonate catalyst for efficient catalytic transfer hydrogenation of levulinic acid to gamma-valerolactone
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NSTL
Elsevier
Production of gamma-valerolactone (GVL) from biomass-derived platform levulinic acid (LA) via catalytic transfer hydrogenation (CTH) over renewable lignosulfonate-derived catalyst is reported herein. Lignosulfonate-derived catalysts were prepared by assembled Zr-metals with sodium lignosulfonate (LigS) derived from the industry paper waste. The resulting Zr-LigS catalyst exhibited excellent catalytic performance in 92.5% GVL yield under mild conditions. With the combination of detail catalyst characterizations, catalytic performance of the Zr-LigS catalyst, in-situ ATR-FTIR and poisoning experiments, the hydrothermal treatment of Zr4+ and LigS resulted in the formation of basic sites, which contributed significantly to the CTH reaction. Kinetic experiments demonstrated that the activation energy was as low as 41.9 kJ/mol. Furthermore, isotopic labeling experiments suggested that the beta-H in isopropanol is transferred to the C=& nbsp;O bond of LA by the formation of six-membered intermediates on the basic sites, which is the rate-determining step.
Catalytic transfer hydrogenationBiomassRenewable catalystBiofuelsHeterogeneous catalystsETHYL LEVULINATECONVERSIONFUELSHEMICELLULOSEREDUCTIONHYBRID
NSTL
Elsevier
