Study of a novel rapid vacuum pressure swing adsorption process with intermediate gas pressurization for producing oxygen

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• 作者：Xianqiang Zhu ; Yingshu Liu ; Xiong Yang ; Wenhai Liu
• 关键词：Miniature oxygen concentrator ; Rapid pressure swing adsorption ; Vacuum ; Pressurization ; Numerical simulation
• 刊名：Adsorption
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：23
• 期：1
• 页码：175-184
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Industrial Chemistry/Chemical Engineering; Surfaces and Interfaces, Thin Films; Engineering Thermodynamics, Heat and Mass Transfer;
• 出版者：Springer US
• ISSN：1572-8757
• 卷排序：23

文摘

A novel rapid vacuum pressure swing adsorption process with intermediate gas pressurization for producing oxygen is proposed to improve the performance of miniature oxygen concentrator based rapid pressure swing adsorption technology. The effects of intermediate gas pressurization and desorption pressure on the performance of the process are evaluated by experiments and simulations. Results showed that pressurization with intermediate gas from product end can effectively improve the oxygen purity of the product. The pressure and oxygen purity of intermediate gas before pressurization were key parameters that affected the oxygen purity of the product. When the adsorption pressure was 240 kPa and the desorption pressure was 60 kPa, the test unit for the process produced 0.75 L min−1 of ~90% O₂ with 29.45% of oxygen recovery from compressed air. The minimum bed size factor (BSF) for ~90% O₂ product was 82.84 kg TPD−1. The BSF could be effectively reduced by lowering the desorption pressure. Moreover, oxygen recovery could be improved by lowering the desorption pressure.