TY - JOUR
T1 - Investigation of reusability and deactivation mechanism of supported platinum catalysts in the practical isomerization of allylic esters
AU - Huang, Qi An
AU - Murayama, Haruno
AU - Yamamoto, Eiji
AU - Honma, Tetsuo
AU - Tokunaga, Makoto
N1 - Funding Information:
This work was financially supported by the ALCA program (No. 11102798) from the Japan Science and Technology Agency and Mitsubishi Chemical Corporation. The XAFS experiments were performed at the BL14B2 of SPring-8 with the approval of the Japan Synchrotron Radiation Institute (JASRI), proposal nos. 2017A1576, 2017B1827, 2018A1736, 2019B1840, and 2022A1786.
Funding Information:
This work was financially supported by the ALCA program (No. 11102798 ) from the Japan Science and Technology Agency and Mitsubishi Chemical Corporation .
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/2/15
Y1 - 2023/2/15
N2 - Metal oxides supported platinum catalysts with residual chloride are known to be reusable soft Lewis acid catalysts for the isomerization of allylic esters. To deepen the understanding of the industrial application of the catalytic system and optimize the catalyst design, an investigation on the reusability and deactivation mechanism of supported platinum catalysts in the isomerization of but-3-ene-1,2-diyl diacetate was conducted. A great reactivation effect was observed by treating the used catalysts with HCl, rather than that of calcination. Pt-Cl/CeO2 showed the best reusability among the catalysts prepared with other metal oxides, and it was uncovered that the reduction of PtOxCly species should be the main reason for deactivation with the assistance of X-ray absorption fine structure (XAFS) analysis. Besides, a relatively stable state was also observed from the XAFS spectra of Pt-Cl/CeO2 catalysts in the reusing test, and it could effectively prevent the active species from further deactivation. Furthermore, in an extended evaluation of the stability of the catalysts, reusability, and a limited deactivation were also verified through a 10-run batch reaction. Additionally, the continuous flow reaction was also proven to be feasible.
AB - Metal oxides supported platinum catalysts with residual chloride are known to be reusable soft Lewis acid catalysts for the isomerization of allylic esters. To deepen the understanding of the industrial application of the catalytic system and optimize the catalyst design, an investigation on the reusability and deactivation mechanism of supported platinum catalysts in the isomerization of but-3-ene-1,2-diyl diacetate was conducted. A great reactivation effect was observed by treating the used catalysts with HCl, rather than that of calcination. Pt-Cl/CeO2 showed the best reusability among the catalysts prepared with other metal oxides, and it was uncovered that the reduction of PtOxCly species should be the main reason for deactivation with the assistance of X-ray absorption fine structure (XAFS) analysis. Besides, a relatively stable state was also observed from the XAFS spectra of Pt-Cl/CeO2 catalysts in the reusing test, and it could effectively prevent the active species from further deactivation. Furthermore, in an extended evaluation of the stability of the catalysts, reusability, and a limited deactivation were also verified through a 10-run batch reaction. Additionally, the continuous flow reaction was also proven to be feasible.
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U2 - 10.1016/j.cattod.2022.06.007
DO - 10.1016/j.cattod.2022.06.007
M3 - Article
AN - SCOPUS:85132509688
SN - 0920-5861
VL - 410
SP - 215
EP - 221
JO - Catalysis Today
JF - Catalysis Today
ER -