An important parameter for synthesis of Al2O3 supported Cu-Zn catalysts in low-temperature water-gas shift reaction under practical reaction condition. (7th June 2019)

• Record Type: Journal Article
• Authors: Shim, Jae-Oh; Na, Hyun-Suk; Ahn, Seon-Yong; Jeon, Kyung-Won; Jang, Won-Jun; Jeon, Byong-Hun; Roh, Hyun-Seog
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 29(2019)
• Page Start: 14853
• Page End: 14860
• Publication Date: 2019-06-07
• Subjects: Aging time and temperature -- Cu-Zn-Al -- LT-WGS -- Physical properties; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.04.042
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: 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 °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 °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. Highlights: Effects of aging temperature/time on Cu-Zn-Al catalyst performance were probed. CO conversion in the LT-WGS reaction was taken as a performance index. Aging temperature/time affected physical properties but not phase composition. Performance was largely determined by surface area and extent of CuO reduction.