Journal
JOURNAL OF POROUS MATERIALS
Volume 26, Issue 6, Pages 1593-1606Publisher
SPRINGER
DOI: 10.1007/s10934-019-00756-4
Keywords
Methane dry reforming reaction; Nickel catalysts; La2O3; Catalytic activity; Catalytic stability
Funding
- National Natural Science Foundation of China [21403304]
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Nickel catalysts are vulnerable to suffering from carbon deposition and metal sintering in the methane dry reforming process under high temperature. Based on these problems, in this paper, La2O3-KIT-6 materials with different La2O3 contents were designed and prepared in order to take advantage of the basic sites of La2O3 and rich mesoporous structure of KIT-6, and then nickel catalysts supported on La2O3-KIT-6 materials were synthesized. In contrast, the Ni/KIT-6 catalyst was also prepared by the same method. XRD, TEM, SEM, physisorption of N-2, XPS, H-2-TPR, Raman, and TG were used for fresh and spent catalysts characterization in this work. The catalytic performance of these Ni/La2O3-KIT-6 catalysts was tested under high temperature methane dry reforming reaction. Our work showed that the La2O3-modified catalysts showed reasonably superior catalytic activity and high long term stability compared with the nickel catalyst supported on KIT-6 without modification of La2O3. The high dispersion of nickel nanoparticles on La2O3-KIT-6 as well as the basic property of La2O3 were both helpful to the resistance towards carbon deposition, and the interaction between Ni nanoparticles and support material in Ni/La2O3-KIT-6 was helpful to the resistance towards nickel sintering on account of the special physicochemical properties of La2O3.
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