Cleanup and Conversion of Biomass Liquefaction Aqueous Phase to C3–C5 Olefins over ZnxZryOz Catalyst
| Autor: | Marco Tomasi Morgano, Alan R. Cooper, Matthew Flake, Stephen D. Davidson, Yaseen Elkasabi, Vanessa Lebarbier Dagle, Karl O. Albrecht, Juan A. Lopez-Ruiz, Robert A. Dagle |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Aqueous solution
010405 organic chemistry Aqueous two-phase system Liquefaction oxide catalyst zinc–zirconia lcsh:Chemical technology 010402 general chemistry 01 natural sciences complex mixtures Catalysis 0104 chemical sciences lcsh:Chemistry Hydrothermal liquefaction chemistry.chemical_compound Corn stover lcsh:QD1-999 chemistry Chemical engineering biomass-derived aqueous phase upgrading Acetone olefin production lcsh:TP1-1185 Physical and Theoretical Chemistry Pyrolysis |
| Zdroj: | Catalysts Volume 9 Issue 11 Catalysts, Vol 9, Iss 11, p 923 (2019) |
| ISSN: | 2073-4344 |
| DOI: | 10.3390/catal9110923 |
| Popis: | The viability of using a ZnxZryOz mixed oxide catalyst for the direct production of C4 olefins from the aqueous phase derived from three different bio-oils was explored. The aqueous phases derived from (i) hydrothermal liquefaction of corn stover, (ii) fluidized bed fast pyrolysis of horse litter, and (iii) screw pyrolysis of wood pellets were evaluated as feedstocks. While exact compositions vary, the primary constituents for each feedstock are acetic acid and propionic acid. Continuous processing, based on liquid&ndash liquid extraction, for the cleanup of the inorganic contaminants contained in the aqueous phase was also demonstrated. Complete conversion of the carboxylic acids was achieved over ZnxZryOz catalyst for all the feedstocks investigated. The main reaction products from each of the feedstocks include isobutene (> 30% selectivity) and CO2 (> 23% selectivity). Activity loss from coking was also observed, thereby rendering deactivation of the ZnxZryOz catalyst, however, complete recovery of catalyst activity was observed following regeneration. Finally, the presence of H2 in the feed was found to facilitate hydrogenation of intermediate acetone, thereby increasing propene production and, consequently, decreasing isobutene production. |
| Databáze: | OpenAIRE |
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