Nitrogen rejection from methane using dual-reflux pressure swing adsorption with a kinetically-selective adsorbent

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...

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...

Biogas Upgrading by Pressure Swing Adsorption

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. ...

Modelling Cryogenic Pressure Swing Adsorption for Methane and N2 Separation for Natural Gas Purification

Natural gas is processed to control purity and bring it to sales standard. A part of this processing involves the removal of N2 and CO2 which may exist in large quantities in the gas. These impurities are often removed using Cryogenic Pressure Swing Adsorption (CPSA). PSA uses pressure changes to maximise the efficiency of adsorption and desorption. A fundamental mathematical model was develope...