Development of Ultra Rapid Pressure Swing Adsorption

为了将变压吸附(PSA)技术应用于更多的领域，开发紧凑、高容量和高能效的变压吸附(PSA)技术的突破性方法是必不可少的。到目前为止，文献中已经找到了满足上述需求的新型吸附剂、新型构型等的开发。我们已经开发出周期时间在秒或更短数量级的极短周期的超快速PSA，使生产能力得以大幅提高1。以空气富氧为模型，研制了活塞驱动的超快速变压吸附装置，并通过实验室实验和简化的数值模拟，阐明了其基本特性。通过活塞的上下运动引入吸气和排气，实际上可以实现周期为一秒或更短的变压吸附操作。新型变压吸附技术在烟道气二氧化碳回收中的应用近年来倍受关注。研究发现，疏水沸石的开发和应用是必要的。疏水沸石使得在高水分条件下充分去除二氧化碳成为可能。蜂窝沸石的提出和发展蜂窝沸石的开发和制备是为了获得压降小得多的高性能URPSA。然而，遗憾的是，人们发现，要达到基于数学模型的数值模拟估计的分离性能，还需要进一步的技术改进。

In order to apply the pressure swing adsorption (PSA) technologies to a more variety of the area, breakthrough approaches are essential in terms of the development of the compact, high-capacity and energy-efficient PSAs. Development of novel adsorbents, novel configurations and so on have been found in the literature so far to meet the above-mentioned demand. We have developed the ultra rapid PSA having extremely short cycle time in the order of the magnitude of second or shorter, enabling the drastic enhancement of the production capacity.1. Development of piston-driven ultra rapid PSABy employing the oxygen enrichment form the air as a model case, the piston-driven ultra rapid PSA was developed and its basic characteristics were clarified by laboratory-scale experiments and simplified numerical simulations. The PSA operations with the cycle time of one second or shorter were practically possible by introducing suction and exhaust by the up-and-down motion of the piston.2. Application to the carbon dioxide recovery from stack gasThe application of this novel PSA to the recovery of carbon dioxide from stack gases which has been paid attention to in these days. It was found that the development and employment of the hydrophobic zeolite are necessary for this purpose. The hydrophobic zeolite has made it possible to sufficiently remove the carbon dioxide in high moisture conditions.3. Proposal and development of honeycomb zeoliteThe honeycomb zeolite was developed and prepared to derive the high performance of the URPSA,which has much less pressure drop. However, unfortunately it was found that the further technical improvements are needed to achieve the separation performance estimated by the numerical simulations based on a mathematical model.