Enhanced Levulinic Acid Production from Cellulose by Combined Brønsted Hydrothermal Carbon and Lewis Acid Catalysts
| Autor: | Tetsuya Kida, Mitsuru Sasaki, Panatpong Boonnoun, Armando T. Quitain, Piyaporn Wataniyakul, Navadol Laosiripojana, Bunjerd Jongsomjit, Artiwan Shotipruk, Tat Boonyakarn |
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| Rok vydání: | 2019 |
| Předmět: |
General Chemical Engineering
chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Heterogeneous catalysis Industrial and Manufacturing Engineering Catalysis Chromium chemistry.chemical_compound 020401 chemical engineering chemistry Yield (chemistry) Levulinic acid Lewis acids and bases 0204 chemical engineering Cellulose 0210 nano-technology Selectivity Nuclear chemistry |
| Zdroj: | Industrial & Engineering Chemistry Research. 58:2697-2703 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.8b05332 |
| Popis: | This study presents a synergistic catalytic system using the combination of Bronsted hydrothermal carbon-based acid (HTCG-SO3H) and Lewis acid catalysts for one-pot conversion of cellulose to levulinic acid (LA). Chromium chloride (CrCl3), among a number of other Lewis acidic metal chlorides, was found to give the highest LA yields, and was therefore used in combination with the HTCG-SO3H, for cellulose conversion to LA. With the appropriate amount of HTCG-SO3H, the formation of side products could be reduced, resulting in improved selectivity of LA. Compared with that obtained by CrCl3 alone, at 5 wt % HTCG-SO3H, 0.015 M CrCl3, 200 °C and 5 min reaction time, the LA yield was considerably enhanced from 30 wt % to 40 wt %. Since HTCG-SO3H is a heterogeneous catalyst that can be easily prepared from biomass at moderate temperature, its use in such combined catalyst system offers economic and environmental benefits, thus making large-scale implementation of such process potentially feasible. |
| Databáze: | OpenAIRE |
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