TY - JOUR
T1 - Operando Raman Spectroscopy of the Microwave-Enhanced Catalytic Dehydration of 2-Propanol by WO3
AU - Tsubaki, Shuntaro
AU - Matsuzawa, Tomoki
AU - Suzuki, Eiichi
AU - Fujii, Satoshi
AU - Wada, Yuji
N1 - Funding Information:
The authors thank Dr. Toshiyuki Yokoi and Y. Kunitake (Tokyo Institute of Technology) for CHNS analysis. The authors thank Prof. T. Yano (Tokyo Institute of Technology) for XPS analysis. This work was supported in part by Grant-in-Aid for Scientific Research (A) 25249113, Grant-in-Aid for Scientific Research (S) 17H06156, and JSPS Grant-in-Aid for Young Scientists (A) 17H05049.
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/2/5
Y1 - 2020/2/5
N2 - Operando Raman spectroscopy was performed to understand the mechanism of a microwave (MW)-enhanced fixed-bed catalytic reaction. An MW operando Raman spectroscopy system was constructed by integrating a Raman spectroscopy probe (785 nm) with a single-mode (TM110) MW cavity resonator equipped with a semiconductor MW generator. MW heating enhanced the dehydration of 2-propanol to diisopropyl ether and propylene by +54 to +60% under the air flow condition. In the argon flow condition, the conversion of 2-propanol was further enhanced by +71 to +83% with >99.9% selectivity toward propylene when MW heating was used. Operando Raman spectroscopy revealed that MW irradiation enhances the reduction of the WO3 surface and exhibits intense light emission, especially under the argon flow condition. The enhanced generation of WO3-x species on the surface of the WO3 catalyst should be, therefore, a key factor in the enhancement of the dehydration of 2-propanol under MW irradiation.
AB - Operando Raman spectroscopy was performed to understand the mechanism of a microwave (MW)-enhanced fixed-bed catalytic reaction. An MW operando Raman spectroscopy system was constructed by integrating a Raman spectroscopy probe (785 nm) with a single-mode (TM110) MW cavity resonator equipped with a semiconductor MW generator. MW heating enhanced the dehydration of 2-propanol to diisopropyl ether and propylene by +54 to +60% under the air flow condition. In the argon flow condition, the conversion of 2-propanol was further enhanced by +71 to +83% with >99.9% selectivity toward propylene when MW heating was used. Operando Raman spectroscopy revealed that MW irradiation enhances the reduction of the WO3 surface and exhibits intense light emission, especially under the argon flow condition. The enhanced generation of WO3-x species on the surface of the WO3 catalyst should be, therefore, a key factor in the enhancement of the dehydration of 2-propanol under MW irradiation.
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U2 - 10.1021/acs.iecr.9b03876
DO - 10.1021/acs.iecr.9b03876
M3 - Article
AN - SCOPUS:85079795778
VL - 59
SP - 1781
EP - 1788
JO - Industrial & Engineering Chemistry Research
JF - Industrial & Engineering Chemistry Research
SN - 0888-5885
IS - 5
ER -