Fast and Highly Selective Continuous-Flow Catalytic Hydrogenation of a Cafestol-Kahweol Mixture Obtained from Green Coffee Beans.

ABSTRACT: This work investigates batch and continuous-flow heterogeneous catalytic hydrogenation of a mixture of cafestol and kahweol (C&K) to obtain pure cafestol. These diterpenes were extracted from green coffee beans, and hydrogenation was performed using well-established palladium catalysts (Pd/C, Pd/CaCO₃, Pd/BaSO₄, and Pd/Al₂O₃) and a carbon black-supported Pd catalyst coated by a covalently tethered SiO₂ shell with mesoporous texture (Pd/CB@SiO₂), all partially deactivated with quinoline. Pd/C 10% poisoned with 1 wt % quinoline gave the best result for batch reaction, producing cafestol from kahweol with high selectivity (>99%) after 10 min. Excellent selectivity was also obtained with the catalyst Pd/CB@SiO₂ with o

SUBMITTER: Lima FA 

PROVIDER: S-EPMC7557226 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature