期刊
RESEARCH ON CHEMICAL INTERMEDIATES
卷 44, 期 6, 页码 3867-3878出版社
SPRINGER
DOI: 10.1007/s11164-018-3389-x
关键词
Ni catalyst; Impregnation; Mesoporous silica; Methane reforming; Carbon dioxide
资金
- Mid-Career Researcher program though the National Research Foundation of Korea [NRF-2017R1A2B2004484]
- National Natural Science Foundation of China [21562043, 21164013]
- Open Projects of the Key Laboratory of Natural Resource of the Changbai Mountain and Functional Molecular, Ministry of Education, Yanbian University, China
Mesoporous silica KIT-6-, SBA-15-, and MCM-41-supported Ni catalysts (Ni/KIT-6, Ni/SBA-15, and Ni/MCM-41) were prepared via impregnation method and studied for CO2 reforming of CH4. The catalysts were characterized by X-ray diffraction analysis, N-2 physisorption measurements, scanning electron microscopy, transmission electron microscopy, and temperature-programmed oxidation (O-2-TPO). The Ni/KIT-6 catalyst exhibited higher catalytic activity and long-term stability compared with Ni/SBA-15 or Ni/MCM-41. The conversion of CH4 and CO2 over Ni/KIT-6 was 99 and 99 %, respectively. The superior catalytic behavior of Ni/KIT-6 is closely related to the large-pore cubic Ia3d structure of KIT-6, which enhanced dispersion of Ni nanoparticles, reduced carbon deposition, and increased diffusion of reactant and products. [GRAPHICS] .
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