Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 44, Issue 29, Pages 14853-14860Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.04.042
Keywords
Aging time and temperature; Cu-Zn-Al; LT-WGS; Physical properties
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Funding
- Korea Institute of Energy Research [B7-2424]
- Yonsei University
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Herein, we investigated the effects of aging time and temperature on the performance of co-precipitation-prepared Cu-Zn-Al catalysts in the low-temperature water-gas shift (LT-WGS) reaction. The highest CO conversion within the employed temperature range as well as very stable activity over 200 h were observed for the catalyst prepared at 80 degrees C and aged for 72 h, which was ascribed to its high surface area and close-to-100% degree of CuO reduction. Conversely, catalysts aged at temperatures below 80 degrees C had poor physical properties, while aging for <72 h resulted in the formation of bulk copper oxide, which was hardly reduced under the low-temperature conditions. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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