頁籤選單縮合
題 名 | Analysis and Modeling of Hydrogen Permeation through Alumina Membranes with Finely Dispersed Palladium=氫氣透過分散型鈀/氧化鋁膜之分析模式 |
---|---|
作 者 | 黃定加; 魏明治; 陳慧英; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 31:4 2000.07[民89.07] |
頁 次 | 頁339-349 |
分類號 | 461.1 |
關鍵詞 | 氫氣透; 分散型鈀/氧化鋁膜; Palladium-based composite membrane; Knudsen diffusion; Hydrogen permselectivity; Solution-diffusion; Hydrogen permeation; |
語 文 | 英文(English) |
中文摘要 | 本研究首先以旋轉含浸法製備分散型鈀/氧化鋁膜,並以阻力模式為理論基礎來探討氣體在此膜之透過行為,結果發現氫氣透過此膜具有兩種不同的控制機構。在較低溫(423-473K)下,氫氣透過通量是隨著溫度增加而降低,分析結果顯示妁有41-58%之氫氣透過通量係由Knudsen擴散機構所提供,其氫與氮氣之分離係數是低於Knudsen擴散機構的理論值(3.74)。反之,在較高溫(523-573K)下,氫氣透過通量係溫度增加的函數,分析檢驗顯示,溶解-擴散機構是氫氣透過此膜之主要傳送機構(52-73%),其氫與氮氣之分離係數可至4.4。 |
英文摘要 | The α-alumina disk with 0.85 μm-thickness finely dispersed palladium was prepared by spin dipping. The fluxes of pure hydrogen and nitrogen through this membrane were measured at temperatures of 423-573 K and pressures difference up to 225 kPa. In the case of the pressure difference of 80 kPa, the ideal separation factor of H₂/N₂ increased from 3.4 at 423 K to 4.4 at 573 K. Furthermore, the effects of operating temperature and pressure on the transport behaviors of hydrogen through the membrane were analyzed based on the resistance model. The results demonstrated that the hydrogen permeation through this membrane was categorized into two regimes. About 41-58 % of hydrogen flux was contributed by Knudsen diffusion in the temperature range of 423-473 K. Within the temperature ranging from 523 K to 573 K, the hydrogen penneance increased with increasing temperature. This is about 52-73% of the overall permence and is attributed to the solution-diffusion mechanism in this regime. |
本系統中英文摘要資訊取自各篇刊載內容。