催化作用
水煤气变换反应
煅烧
结晶度
制氢
比表面积
色散(光学)
化学工程
金属有机骨架
氢
多孔性
材料科学
化学
无机化学
吸附
物理化学
复合材料
有机化学
工程类
物理
光学
作者
Hak-Min Kim,Jeong Yong Lee,Min-Ju Park,Dae‐Woon Jeong
标识
DOI:10.1016/j.ijhydene.2023.04.093
摘要
The development of catalysts for the water-gas shift (WGS) reaction is attracting attention because of the increased interest in on-site small-scale hydrogen production, which requires highly active and stable catalytic performance under severe conditions. In this study, metal–organic frameworks (MOF), which have been adopted in various fields because of their high surface area, diversity of assemblies, and uniform porosity, were applied to prepare Cu/CeO2 catalysts for the WGS reaction. MOF-derived CeO2 (MDC) was obtained from a Ce-BTC-based MOF calcined at different temperatures. Various techniques were used to investigate the physicochemical properties of the Cu/MDC catalysts. Important properties that determine the catalytic performance, such as crystallinity, surface area, Cu dispersion, reducibility, and oxygen storage capacity (OSC), were affected by the treatment temperature of MDC. Among the Cu/MDC catalysts, Cu/MDC prepared with MDC that was treated at 400 °C (Cu/MDC(400)) exhibited the highest CO conversion at reaction temperatures of 200–400 °C. In addition, Cu/MDC(400) maintained 80% of its initial CO conversion after 48 h on stream, even at a very high gas hourly specific velocity of 50,233 mL·gcat−1·h−1. This result was attributed to the high surface area, Cu dispersion, OSC, and easier reducibility of the Cu/MDC(400) catalyst compared to Cu supported on MDC calcined at other temperatures.
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