Synthesis and Characterization of Magnesium Oxide Supported Catalysts with a Meso-Macropore Structure
- Synthesis and Characterization of Magnesium Oxide Supported Catalysts with a Meso-Macropore Structure
- 김상우; 김인호; 문동주
- Synthesis; Characterization; Magnesium Oxide; Catalysts; Meso-Macroporous; Gas to Liquid; SCR; FT; Catalyst Support; Supercritical Fluid
- Issue Date
- Journal of nanoscience and nanotechnology
- VOL 13, NO 8, 5750-5753
- Nanostructured magnesium oxide catalyst support materials with controlled morphology and size were synthesized from a supercritical carbon dioxide/ethanol solution via chemical reaction of soluble precursors and subsequent thermal decomposition. Leaf-like magnesium hydroxide precursors with high specific surface area were formed by a low-temperature chemical reaction at below 140 °C, while magnesium carbonate cubes with a very low surface area less than 3.3 ㎡/g were formed by temperature-induced phase transition from a loose to a dense structure during carbonation reaction at above 150 °C. The specific surface area has significantly increased higher than 90 ㎡/g due to the creation of highly porous MgO cubes with mesopore structure formed after thermal decomposition of the magnesium carbonate precursors. Ni-magnesium oxide catalysts with bimodal pore structure were finally formed by the consequence of packing heterogeneity of the porous magnesium oxides with different morphologies and sizes.
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