CO2 absorption and desorption of Bi2O3-La2O3 powders prepared by mechanical synthesis |
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Authors: | Takao Esaka Kohichi Moto-ike |
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Affiliation: | Department of Materials Science, Faculty of Engineering, Tottori University, Minami 4-101, Koyamacho, Tottori 680-0945, Japan |
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Abstract: | In order to obtain CO2-absorbents to eliminate CO2 concentration locally, Bi2O3-La2O3 mixed powders were prepared by mechanical alloying (MA) method using a planetary ball-milling machine. CO2-absorption and desorption properties were checked by TG-DTA for the obtained powder samples. As a result, the sample shown by (Bi2O3)1−x(La2O3)x x≤0.50] was found to form α-Bi2O3-solid solution with repeated CO2-adsorption and desorption around 400- 500 °C. Absorbed and desorbed CO2 contents varied with MA time: the 72 h MA’ed sample had a larger CO2 content than the 24 h MA’ed sample. The performance depended on the sample composition, and (Bi2O3)0.70(La2O3)0.30 was found to have the highest performance in the present system. |
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Keywords: | A Oxides C Thermogravimetric analysis C X-ray diffraction D Phase equilibria |
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