著者

三原 直人 奥村 諭 小島 義弘 松田 仁樹

出版者

無機マテリアル学会

雑誌

Journal of the Society of Inorganic Materials, Japan (ISSN:21854378)

巻号頁・発行日

vol.13, no.320, pp.51-58, 2006-01-01 (Released:2011-03-07)

参考文献数

7

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Effect of Fe2O3 on reductive decomposition of gypsum was investigated. The experiments were carried out by employing CaSO4 powder of the mean particle size of 80, um which was mixed with 150 mass% Fe2O3, under CO : 2%-CO2 : 30%-N2 : balance and CO : 10%-N2 : balance atmosphere at 1273 K, in a gas-flow type tubular reactor. Furthermore, SO2 absorption characteristic of CaO thus regenerated from CaSO4-Fe2O3 mixture by CO reductive gas was studied.It was found that the rate of reductive decomposition of CaSO4 was drastically enhanced by addition of Fe2O3. Moreover, the formation of CaS was inhibited by the addition of Fe2O3. Calcium ferrite such as 2CaO.Fe2O3 was detected in the reaction product after reductive decomposition of the mixture of CaSO4-Fe2O3. As the result of SO2 absorption experiment, it was found that CaO regenerated. from CaSO4-Fe2O3 by CO reductive gas had a lower SO2 absorption performance than CaO regenerated from CaSO4. due to a decrease in Dore volume.