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題 名 | 無燄式甲烷高溫催化燃燒動力學研究=Study on Flameless Methane High Temperature Catalytic Combustion Kinetics |
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作 者 | 李新國; 葉早發; 汪成斌; 朱光馨; | 書刊名 | 中正嶺學報 |
卷 期 | 32:2(A) 民93.05 |
頁 次 | 頁151-164 |
分類號 | 460.02 |
關鍵詞 | 甲烷燃燒; 六鋁酸鹽催化劑; 微反應器; Methane combustion; Hexaaluminate catalysts; Micro-reactor; |
語 文 | 中文(Chinese) |
中文摘要 | 甲烷燃燒催化放熱反應速度極快造成燃燒室溫度快速提升到1300 ℃ ~1500℃ 以上,因此開 發耐高溫之六鋁酸鹽催化劑溫度取代支撐性貴金屬催化劑可避免高溫燒結、蒸發等喪失催化活性的現象。本研究分別以沉澱法及溶膠-疑膠法備製了兩種六銘酸鹽催化劑SLMA(Sr[]La[]MnAl[]O[])及SBLMA(Sr[]Ba[]La[]MnAl[]O[]),所製得催化劑以BET量測表 面積,並以自行設計之微反應器進行甲沈催化燃燒,探討高溫催化劑的催化活性及燃燒動力學 機構。其中其高表面積的催化劑(以溶膠-凝膠法備製之 SLMA 及沉澱法備製之SBLMA), 可得到較高的催化燃燒活性。經 Arrhenius 方程式計算,了解高溫區之活性與催化劑表面積有關,而低溫區燃燒反應活性與過渡金屬活性體有關,並從高、低溫區斜率之轉變,可推論得知燃燒過程中會從 Eley-Rideal 機構轉為 Mars-Van krevelen 機構。 |
英文摘要 | Methane catalytic exothermic combustion reaction was high speed to promote temperature above 1300℃~1500℃. Therefore, Supported noble metal replace by durable hexaaluminate catalysts avoided losing catalyst activity phenomena by sinter and vaporization. In this study, the catalysts of (Sr0.8La0.2MnAl11O19.α) and SBLMA (Sr0.3Ba0.5La0.2MnAl11O19.α) were prepared by coprecipiation and sol-gel method. Those catalysts were measure by BET instrument. The micro-reactor experiment of designed myself proceeded methane catalytic combustion and discussed the high temperature catalytic activity and combustion kinetic mechanisms. These catalysts, include of SLMA and SBLMA, have high surface area and higher catalytic combustion activity. Via Arrhenius equation calculator, it is found out that the high and low temperature active energy was related to the surface area and the transient metal site respectively. The slope of high-low temperature area change could be known that the mechanisms were transfer from Eley-Rideal to Mars-van Krevelen mechanisms. |
本系統中英文摘要資訊取自各篇刊載內容。