ZrO2-Promoted Ni/MgO Catalyst for Methan Dry Reforming
著者
和文:
日野出洋文,
Teddy Go Monroy,
Leonila Cobacha Abella,
Susan Manalastas Gallardo.
英文:
HIROFUMI HINODE,
Teddy Go Monroy,
Leonila Cobacha Abella,
Susan Manalastas Gallardo.
言語
English
掲載誌/書名
和文:
英文:
Jounal of Material Science and Engineering A
巻, 号, ページ
vol. 2
7
544-549
出版年月
2012年7月10日
出版者
和文:
英文:
会議名称
和文:
英文:
開催地
和文:
英文:
アブストラクト
Dry reforming is one of the primary routes in the conversion of methane to synthesis gas. The catalysts used are often composed of transition metals like nickel, supported on metallic and non-metallic oxides such as alumina and silica. In the industry, methane dry reforming is not widely-used because of rapid catalyst deactivation by excessive carbon deposits. Researchers have shown that noble metals like platinum were able to reduce carbon deposits through time. However, use of these metals lead to more expensive catalysts. Studies have also shown that the use of appropriate support materials can also minimize the rate of carbon deposition. The catalyst used in this study is zirconia-promoted nickel on magnesia. 5, 10 and 15 wt% nickel was impregnated on a 1:1 mole ratio of MgO-ZrO2, using Ni(NO3)2 ·6H2O solution as precursor. The catalysts were dried at 40 °C for 24 hours, 120 °C for four hours and calcined in air at 800 °C for another four hours. They were pelletized, crushed, and screened to produce catalyst particle sizes ranging from 0.0165 to 0.0331 inch (–20/+40 mesh). Finally, the catalysts were reduced at 500 °C by a stream of 20/80 H2/He flowing at 100 ml/min. The catalysts were characterized using the Atomic Absorption Spectroscopy for nickel content, Quantachrome Autosorb for surface area, pore volume, and particle size distribution, X-ray diffractometer for crystal structure, Temperature Programmed desorption experiment for number of active and basic sites, Scanning Electron Microscopy for surface morphology, and Transmission electron microscopy for detailed chemical identity and crystal orientation.
Key words: Methane, dry reforming, catalysis, impregnation.
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