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Title

Stable Continuous Production of γ-Valerolactone from Biomass-Derived Levulinic Acid over Zr–Al-Beta Zeolite Catalyst

AuthorsLópez-Aguado, Clara; Paniagua, Marta; Melero, Juan Antonio; Iglesias, Jose; Juárez, Pablo; López Granados, Manuel ; Morales, Gabriel
KeywordsBiomass valorization
Levulinic acid
Y-valerolactone (GVL)
Zirconium
Beta zeolite
Fixed bed
Continuous flow
Issue Date17-Jun-2020
PublisherMultidisciplinary Digital Publishing Institute
CitationCatalysts 10(6): 678 (2020)
AbstractThe one-pot conversion of biomass-derived platform molecules such as levulinic acid (LA) and furfural (FAL) into γ-valerolactone (GVL) is challenging because of the need for adequate multi-functional catalysts and high-pressure gaseous hydrogen. As a more sustainable alternative, here we describe the transfer hydrogenation of LA to GVL using isopropanol as a hydrogen donor over a Zr-modified beta zeolite catalyst in a continuous fixed-bed reactor. A stable sustained production of GVL was achieved from the levulinic acid, with both high LA conversion (ca. 95%) and GVL yield (ca. 90%), for over at least 20 days in continuous operation at 170 °C. Importantly, the small decay in activity can be advantageously overcome by the means of a simple in situ thermal regeneration in the air atmosphere, leading to a complete recovery of the catalyst activity. Key to this outstanding result is the use of a Zr-modified dealuminated beta zeolite with a tailored Lewis/Brønsted acid sites ratio, which can synergistically catalyze the tandem steps of hydrogen transfer and acid-catalyzed transformations, leading to such a successful and stable production of GVL from LA.
Description© 2020 by the authors.
Publisher version (URL)https://doi.org/10.3390/catal10060678
URIhttp://hdl.handle.net/10261/215654
DOIhttp://dx.doi.org/10.3390/catal10060678
ISSN2073-4344
E-ISSN2073-4344
Appears in Collections:(ICP) Artículos
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