JOURNAL OF CHEMICAL ENGINEERING OF JAPAN | |
Effect of Impregnation Conditions of Cobalt Nano Particles in Mesoporous Silica Using Supercritical Fluid Solvent | |
Hiroshi Inomata1  Yoshiyuki Sato1  Ikuo Ushiki1  Masaki Ota1  Taichi Shimizu1  | |
[1] Research Center of Supercritical Fluid Technology, Graduate School of Engineering, Tohoku University | |
关键词: Supercritical Carbon Dioxide; Co Catalysts; Mesoporous Silica; | |
DOI : 10.1252/jcej.11we242 | |
来源: Maruzen Company Ltd | |
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【 摘 要 】
References(35)Cited-By(6)Cobalt nanoparticles were synthesized in mesoporous silica via a supercritical CO2 impregnation technique using methanol as an entrainer at temperatures from 313 to 353 K, pressures from 20 to 25 MPa, and methanol concentrations from 5 to 20 mol%. The loading of cobalt particles in the materials, as quantified by energy-dispersive X-ray spectroscopy, was found to depend strongly on methanol concentration and slightly on temperature, and was revealed to reach a maximum of 3.8 wt% after calcination at 333 K, 20 MPa, a methanol concentration of 10 mol%, and a fixed reaction time of 5 h. Repeated treatment under the optimized conditions improved the Co loading up to 6.6 wt%, where the Co particles were observed by transmission electron microscopy (TEM) to be in the silica mesopores.
【 授权许可】
Unknown
【 预 览 】
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RO201912080696860ZK.pdf | 19KB | ![]() |