Comparison of Radial- and Axial-Flow Rapid Pressure Swing Adsorption Processes

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• 作者：Wen-Chun Huang and Cheng-tung Chou
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2003
• 出版时间：April 30, 2003
• 年：2003
• 卷：42
• 期：9
• 页码：1998 - 2006
• 全文大小：162K
• 年卷期：v.42,no.9(April 30, 2003)
• ISSN：1520-5045

文摘

Compared to axial-flow rapid pressure swing adsorption (RPSA) processes, radial-flow RPSAprocesses can have the larger cross section for the same volume of adsorbers. Radial-flow RPSAprocesses, thus, may have the advantage of a low-pressure drop for the same volumetric flowand a small particle size of the adsorbent can be used for the same pressure drop. After aninnovative coordinate transformation, the governing equations of both radial- and axial-flowRPSA processes carry a similar form. Therefore, only a simulation program is needed and isdeveloped to simulate the dynamics of the adsorbers for both systems. The simulation results ofan axial-flow RPSA were compared with the experimental data in the literature. For the modelingof radial-flow RPSA processes, the parameter of effective length is equivalent to the length ofthe packed bed of axial-flow RPSA processes. For the same feed pressure and the same amountof adsorbent, the separation performance of the radial-flow RPSA processes would be betterthan that of axial-flow RPSA processes if small adsorbent particles and long effective lengthswere used. The effects of the particle size of the adsorbent, feed pressure, production rate, andfeed direction on the performance of radial-flow RPSA were also explored.