2023-08-112023-08-112020CATHARIN, Caroline Winter; CHAVES, Andréa Rodrigues; SOUZA, Paulo Sérgio de; NODA PÉREZ, Caridad. Babassu activated carbon as catalyst for chalcone production by Claisen?Schmidt reaction: kinetic study, mechanism proposal and continuous flow bed reactor. Brazilian Journal of Chemical Engineering, São Paulo, v. 37, p. 415-423, 2020. DOI: 10.1007/s43153-020-00034-w. Disponível em: https://link.springer.com/article/10.1007/s43153-020-00034-w. Acesso em: 10 ago. 2023.e- 1678-43830104-6632https://link.springer.com/article/10.1007/s43153-020-00034-wPowdered and granulated activated carbons from babassu were submitted to alkaline treatment with 2 mol L–1 NaOH solution, washed with distilled water to pH 8 and dried. The prepared carbons were tested as catalysts in the Claisen–Schmidt reaction between acetophenone and 4-nitrobenzaldehyde using methanol as solvent at room temperature for 24 h. Babassu granular carbon (BGC) and basic babassu granular carbon (BBGC) exhibited the highest conversions, of 69.26% and 66.59%, respectively. The kinetic study was carried out with BBGC, which led to values of kinetic constant k of 5.26 L mol–1 h–1 at 35 °C and 7.35 L mol–1 h–1 at 50 °C. The activation energy of the reaction was 18.91 kJ mol–1. This study proposes a second-order pseudo-homogeneous reaction catalyzed by BBGC. A continuous fixed-bed reactor operation was carried out with BBGC catalyst and the best conversion was 60% in 120 min using of 0.05 mol L–1 reactants concentration.engAcesso RestritoBabassu activated carbonChalconeHeterogeneous catalysisKinetic studyClaisen–schmidt mechanismArtigo10.1007/s43153-020-00034-w