頁籤選單縮合
題名 | Analytical Solution and New Approximate Model for a Batch Adsorber=批式吸附器之可解析解與新近似解模式 |
---|---|
作者 | 廖心慈; 蕭敬業; Liao, Hsin-tzu; Shiau, Ching-yeh; |
期刊 | Journal of the Chinese Institute of Chemical Engineers |
出版日期 | 20010300 |
卷期 | 32:2 2001.03[民90.03] |
頁次 | 頁151-161 |
分類號 | 342.8 |
語文 | eng |
關鍵詞 | 批式吸附器; Batch adsorber; Two-stage model; Parabolic concentration profile; |
中文摘要 | 本文考慮孔洞擴聚阻力與外部膜擴散阻力,建立了線性吸附等溫線之吸附器模式,雖然對平板形、圓柱形及球形之吸冷二之可解析解可以求得,但是,當分配值(partition ratio)及/或Biot數較大時,可解析解需要進行複雜的計算才能獲得準確之收斂結果。為解決此一問題,本研究提出計算較簡單之新兩階段模式,對大範圍之分配值及Biot數,此一新模式都可適用整個操作時間範圍。與可解析解的結果比較,本文提出之新模式較拋物線兩階段模式及拋物線濃度分佈模式準確很多。另外,本文也討論操作參數分配值及Biot數對批式吸附器之影響。 |
英文摘要 | A pore diffusion model for the operation of a batch adsorber with external film diffusion resistance and adsorption isotherm is formulated. The analytical solutions for three geometric adsorbents: a slab, a cylinder, and a sphere, with linear adsorption isotherm can be obtained but they converge too slowly to be of much use numerically when the partition ratio is large and/or the Biot number is large. A new two-stage model, which is a close approximation, can give good agreement with the analytical solution throughout the time domain for wide range of partition ratio and Biot number. By comparing with the analytical solution, it is proved that the new two-stage model is much better than the parabolic two-stage model and the parabolic profile approximation. The influences of partition ratio and Biot number on the operation of a batch adsorber are also studied. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。