期刊
ACS ENGINEERING AU
卷 2, 期 5, 页码 436-449出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsengineeringau.2c00015
关键词
hydrodeoxygenation; bimetallic catalyst; platinum; rhenium; activated carbon; jet fuel
资金
- Magnus Ehrnrooth Foundation
- Biocenter Finland
In this study, bimetallic platinum-rhenium catalysts supported on activated carbon were characterized and tested for the hydrodeoxygenation of isoeugenol. The catalyst with the highest rhenium loading, Pt-Re(1:5)/C, showed the highest activity, achieving complete conversion of isoeugenol and high yield of propylcyclohexane.
Bimetallic platinum-rhenium catalysts supported on activated carbon were tested for the hydrodeoxygenation (HDO) of isoeugenol at 250 degrees C and 30 bar of H-2 in a batch reactor. The catalysts were characterized by inductively coupled plasma atomic emission spectrometry (ICP-IES), N-2 physisorption, electron microscopy (high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), transmission electron microscopy (TEM)), temperature-programmed reduction, X-ray absorption spectroscopy (X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS)), and temperature-programmed desorption of ammonia. Bimetallic catalysts containing Pt and Re were much more active than monometallic Pt/C and Re/C. Complete isoeugenol conversion, high propylcyclohexane yield (99%), and a high liquid-phase mass balance (77%) were obtained for the catalyst with the highest Re loading, Pt-Re(1:5)/C. Such high activity is attributed to a synergistic effect between the reduced Pt and the Re-oxide species, as both metal active sites and oxygen vacancies are required for HDO. The apparent activation energy for the HDO of isoeugenol with Pt-Re(1:5)/C was 44 kJ/mol.
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