Assembly of ordered mesoporous alumina-supported nickel nanoparticles with high temperature stability for CO methanation
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- 作者：Hao Tian ; Shuirong Li ; Liang Zeng ; Hongyan Ma ; Jinlong Gong
- 刊名：Science China Materials
- 出版年：2015
- 出版时间：January 2015
- 年：2015
- 卷：58
- 期：1
- 页码：9-15
- 全文大小：1310KB
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Shuirong Li (1) (2)
Liang Zeng (1) (2)
Hongyan Ma (1) (2)
Jinlong Gong (1) (2)
1. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
2. Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China - 刊物类别：Materials Science, general; Chemistry/Food Science, general;
- 刊物主题：Materials Science, general; Chemistry/Food Science, general;
- 出版者：Science China Press
- ISSN：2199-4501
文摘
The high-temperature methanation of CO is an important reaction in the processes used to produce substitute natural gas, while the Ni-based catalysts prepared using the conventional impregnation method tend to deactivate under high-temperature reaction conditions. This paper describes the design and assembly of ordered mesoporous alumina (OMA) using highly disperse nm nickel nanoparticles (Ni NPs), via a one-pot, evaporation-induced self-assembly (EISA) method. Small-angle X-ray diffraction (XRD), transmission electron microscope (TEM), and N2 adsorption and desorption results revealed that this catalytic material had highly ordered mesopores, which were retained even after long-term stability tests. The catalyst exhibited excellent sintering-resistant and anti-coking properties in high-temperature CO methanation reactions (60% CO conversion after 50 hours of accelerated deactivation at 700°C). The improved catalytic performance was attributed to the matrix of the OMA, which effectively improved the dispersion of the nickel particles, and prevented the Ni NPs from sintering, via a particle migration and coalescence mechanism. The Ni-OMA catalyst demonstrated here shows promise for high-temperature methanation. CO , “”( nm). XRDTEMN2 . CO .