期刊
APPLIED SURFACE SCIENCE
卷 280, 期 -, 页码 876-887出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2013.05.082
关键词
Nanocapsular hydrotalcites; Dry reforming of methane; Sol-gel method
类别
资金
- Brazilian National Council for Scientific Development (CNPq)
- FAPESP agency
Nanocapsular hydrotalcites (layered double hydroxides - LDHs) were synthesized by the sol-gel method and used as precursors of nano-structured mixed oxides containing various nickel loads (4, 15 and 19 wt%). The best conditions for the preparation of LDHs were analyzed and the structures of the resulting mixed oxides were studied. The optimal nickel load and calcining conditions were optimized. Finally, the resulting catalysts were tested in the dry reforming of methane for 8 h at 800 degrees C under atmospheric pressure. These materials showed high activity and stability, and the coke deposits were minimal on the catalyst prepared under optimal conditions (19 wt% nickel load and thermal treatment at 650 degrees C). The best catalyst formed amorphous carbon, which seems not to be prejudicial to the reaction. (C) 2013 Elsevier B.V. All rights reserved.
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