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題名 | Kinetics and Mechanism of Ilmenite Reduction with Carbon Monoxide=鈦鐵礦還原反應動力學及其機理 |
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作者 | 趙毅; 施德曼; | 書刊名 | 吳鳳學報 |
卷期 | 5 1997.06[民86.06] |
頁次 | 頁173-182 |
分類號 | 345.5 |
關鍵詞 | 鈦鐵礦; 還原反應; 動力學; 機理; Ilmenite; Reduction; Kinetics; Mechanism; |
語文 | 英文(English) |
中文摘要 | 本研究應用微重力反應裝置,及電子顯微鏡技術探討月球鈦鐵礦 (FeTiO��)於高 溫下的一氧化碳還原反應動力學及其反應機理。 結果顯示鈦鐵礦 (FeTiO �� ) 轉化率對時 間之關係曲線呈 S 形狀,表征活化能為 29.6 kcal/mole,反應產物鐵 (Fe) 在反應過程中 由反應區域穿過產物二氧化鈦層 (TiO �� ) 輸送至粒子邊緣。 |
英文摘要 | The kinetics and mechanism of reduction of ilmenite by carbon monoxide at 900 to 1,100 ℃ were investigated. The temporal profiles of conversion have a sigmoidal shape and indicate the presence of three different stages (induction, acceleration and deceleration) during CO reduction at all temperatures. The apparent activation energies based on the initial rates are 29.6 kcal/mole for CO reduction. The reaction is first order with respect to carbon monoxide under the experimental conditions studies. Both SEM and DEX analyses show that the diffusion of Fe product away from the reaction front and through the TiO �� phase, followed by the nucleation and growth of a separate Fe phase are important steps in the reduction process. |
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