Hydrogen-free carbon monoxide production through decomposition of formic acid over a HPW/TiO2 catalyst
- Authors
- Kang, Dong-Chang; Pyen, Seung Hee; Kim, Eun-Jeong; Kim, Young Wook; Suh, Young-Woong; Kim, Dong-Pyo; Shin, Chae-Ho; Min, Hyung-Ki
- Issue Date
- Jul-2023
- Publisher
- ELSEVIER SCIENCE INC
- Keywords
- Phosphotungstic acid; Formic acid; Acidity; Dehydration; Carbon monoxide
- Citation
- JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.123, pp.396 - 403
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
- Volume
- 123
- Start Page
- 396
- End Page
- 403
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/192033
- DOI
- 10.1016/j.jiec.2023.03.056
- ISSN
- 1226-086X
- Abstract
- The dehydration of formic acid over supported phosphotungstic acid (H3PW12O40, HPW) catalysts was investigated for the production of hydrogen-free carbon monoxide (CO). The variations in the support type (SiO2, Al2O3, ZrO2, and TiO2) and HPW content (0.0–20.0 wt.%) affect the acidity of catalysts, which was demonstrated by the temperature-programed desorption of iso-propanol (IPA-TPD) and pyridine-adsorbed infrared spectroscopy (Py-IR). The catalytic activity in formic acid dehydration exhibited a volcano-type distribution in accordance with the HPW content and was maximized at 15 wt.% loading. Furthermore, the catalytic activity was more closely related to the density of Brønsted acids than that of Lewis acids and inversely proportional to the peak temperature of propylene desorption during IPA-TPD. The strongly adsorbed H2O on the catalysts, which is generated during formic acid dehydration, induces deactivation of the catalyst, particularly at lower reaction temperatures (<230 °C).
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