| タイトル | Synthesis and Characterization of Cobalt Containing Nanoparticles on Alumina A Potential Catalyst for Gas to Liquid Fuels Production |
| 本文（外部サイト） | http://hdl.handle.net/2060/20160011333 |
| 著者（英） | Cowen, Jonathan; Hepp, Aloysius F. |
| 著者所属（英） | NASA Glenn Research Center |
| 発行日 | 2016-09-01 |
| 言語 | eng |
| 内容記述 | Fisher-Trpsch synthesis (FTS) is a century-old gas-to-liquid (GTL) technology that commonly employs cobalt (Co, on an oxide support) or iron (supported or not) species catalysts. It has been well established that the activity of the Co catalyst depends directly upon the number of surface Co atoms. The addition of promoter (mainly noble) metals has been widely utilized to increase the fraction of Co that is available for surface catalysis. Direct synthesis of Co nanoparticles is a possible alternative approach; our preliminary synthesis and characterization efforts are described. Materials were characterized by various transmission microscopies and energy dispersive spectroscopy. Tri-n-octylphosphine oxide (TOPO) and dicobalt octacarbonyl were heated under argon to a temperature of 180 deg with constant stirring for 1 hr. Quenching the reaction in toluene produced Co-containing nanoparticles with a diameter of 5 to 10 nm. Alternatively, an alumina support (SBA-200 Al2O3) was added; the reaction was further stirred and the temperature was decreased to 140 deg to reduce the rate of further growth/ripening of the nucleated Co nanoparticles. A typical size of Co-containing NPs was also found to be in the range of 5 to 10 nm. This can be contrasted with a range of 50 to 200 nm for conventionally-produced Co-Al2O3 Fischer-Trpsch catalysts. This method shows great potential for production of highly dispersed catalysts that are either supported or unsupported. |
| NASA分類 | Chemistry and Materials (General); Inorganic, Organic and Physical Chemistry; Energy Production and Conversion |
| レポートNO | E-19262
NASA/TM-2016-219138
GRC-E-DAA-TN33754 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
