(397d) Effect of an Equalization Step on the Minimum Bed Size Factor of a Rapid Pressure Swing Adsorption Process
The main objective of this study was to determine what effect operating with a pressure equalization step has on the minimum BSF. An equalization step is often employed to reduce the power requirement of a RPSA process. The process in this study used a commercial LiLSX zeolite (~0.5 mm in diameter) to compare results of traditional 4-step feed pressurization cycles with cycles operating with a product end pressure equalization step. The results from the 4-step cycles demonstrate a definite minimum in BSF at a cycle time ~ 4 seconds for a product oxygen purity ~ 96% (argon free air feed). However, the equalization step cycles were able to go to even lower cycle times without a measurable minimum BSF. Possible reasons for why this is occurring will be discussed.