Optimal design of dual-reflux pressure swing adsorption units via equilibrium theory: Process configurations employing heavy gas for pressure swing

Process intensification in duplex pressure swing adsorption

As an alternative to the pressure swing adsorption (PSA) based on the Skarstrom cycle or its variants, a novel two-bed PSA--called duplex PSA--has been proposed by Hirose and independently by Leavitt to get both products of high purities. Simulation and experimental studies on duplex PSA for CO2 capture indicate that CO2 can be enriched to 95 mol% of feed containing 20 mol% CO2 and 80 mol% N2. ...

Producing Nitrogen via Pressure Swing Adsorption

Nitrogen gas is a staple of the chemical industry. Because it is an inert gas, nitrogen is suitable for a wide range of applications covering various aspects of chemical manufacturing, processing, handling, and shipping. Due to its low reactivity, nitrogen is an excellent blanketing and purging gas that can be used to protect valuable products from harmful contaminants. It also enables the safe...

Extraction of Xenon Using Enriching Reflux Pressure Swing Adsorption

Measuring radioactive xenon isotopes in the atmosphere is an important technique used for monitoring within the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Several process steps are needed to capture and prepare a xenon sample suitable for transfer to a nuclear detector. These processes include air drying, xenon collection, concentration, and purification. The ideal xenon sampling system woul...

Robust Control of a Pressure Swing Adsorption Process

This paper presents the H∞ control of a pressure swing adsorption process. This separation process is characterized by periodic operations. The objective of the control is to assign the trajectory of the output system purity and to reject the perturbation on the inlet composition. The control design is synthetized from some Hammerstein model that approximates the cyclic process. The control sch...

Biogas Upgrading by Pressure Swing Adsorption