TY - JOUR
T1 - Tuning Cu+ species/Brønsted acids of copper phyllosilicate by K+ doping for selective hydrogenation of methyl palmitate to hexadecanol
AU - Prasanseang, Warot
AU - Choojun, Kittisak
AU - Poo-arporn, Yingyot
AU - Huang, Ai Lin
AU - Lin, Yu Chuan
AU - Chen, En
AU - Lee, Hsin Hui
AU - Chung, Po Wen
AU - Sooknoi, Tawan
N1 - Funding Information:
This work is supported by King Mongkut's Institute of Technology Ladkrabang (KMITL), National Research Council of Thailand (NRCT), Higher Education Sprout Project, Ministry of Education to the Headquarters of University Advancement at National Cheng Kung University (NCKU). In addition, this project is funded by National Research Council of Thailand (NRCT) and King Mongkut's Institute of Technology Ladkrabang (KMITL): (N42A660796). We would like to thank Synchrotron Light Research Institute (Public organization), Thailand, for the in situ TR-XANES experiments and the Scientific Instruments Center, School of Science, KMITL for characterization techniques.
Funding Information:
This work is supported by King Mongkut’s Institute of Technology Ladkrabang (KMITL), National Research Council of Thailand (NRCT), Higher Education Sprout Project, Ministry of Education to the Headquarters of University Advancement at National Cheng Kung University (NCKU). In addition, this project is funded by National Research Council of Thailand (NRCT) and King Mongkut’s Institute of Technology Ladkrabang (KMITL): (N42A660796). We would like to thank Synchrotron Light Research Institute (Public organization), Thailand, for the in situ TR-XANES experiments and the Scientific Instruments Center, School of Science, KMITL for characterization techniques.
Publisher Copyright:
© 2023 Elsevier Inc.
PY - 2023/12
Y1 - 2023/12
N2 - Selective hydrogenation of methyl palmitate to hexadecanol can be manipulated by tuning Cu+ species and Brønsted acid sites (BAS) of copper phyllosilicate (CuPS) catalysts with K+ doping. The catalysts were prepared by impregnating K+ onto reduced and non-reduced CuPS. The reactions were carried out in a fixed-bed flow reactor at 250 °C under atmospheric H2. In situ TR-XANES and Py-IR suggest that the presence of K+ could stabilize Cu+ species and neutralize BAS. As compared to the non-reduced sample, K+ loading (0.01–0.10 wt%) on the reduced CuPS provide higher Cu+ fraction (10–16%), lower BAS (0.82 to 0.16μ mol/g) and lower Cu dispersion (75 to 52%). A balance between Cu0 active surface and Cu+ content provides an optimum hydrogenation activity (up to 80 %). The increased Cu+ species, together with the decreased BAS, does not only enhance the catalyst stability, but also hexadecanol selectivity (from 35 to 60%, at ∼50% conversion).
AB - Selective hydrogenation of methyl palmitate to hexadecanol can be manipulated by tuning Cu+ species and Brønsted acid sites (BAS) of copper phyllosilicate (CuPS) catalysts with K+ doping. The catalysts were prepared by impregnating K+ onto reduced and non-reduced CuPS. The reactions were carried out in a fixed-bed flow reactor at 250 °C under atmospheric H2. In situ TR-XANES and Py-IR suggest that the presence of K+ could stabilize Cu+ species and neutralize BAS. As compared to the non-reduced sample, K+ loading (0.01–0.10 wt%) on the reduced CuPS provide higher Cu+ fraction (10–16%), lower BAS (0.82 to 0.16μ mol/g) and lower Cu dispersion (75 to 52%). A balance between Cu0 active surface and Cu+ content provides an optimum hydrogenation activity (up to 80 %). The increased Cu+ species, together with the decreased BAS, does not only enhance the catalyst stability, but also hexadecanol selectivity (from 35 to 60%, at ∼50% conversion).
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U2 - 10.1016/j.jcat.2023.115115
DO - 10.1016/j.jcat.2023.115115
M3 - Article
AN - SCOPUS:85171754169
SN - 0021-9517
VL - 428
JO - Journal of Catalysis
JF - Journal of Catalysis
M1 - 115115
ER -