Effects of feed gas concentration, temperature and process parameters on vacuum swing adsorption performance for CO2 capture

Abstract

Vacuum swing adsorption (VSA) is a commercial technology for gas separation, and is promising for CO2 removal from a range of process gases. In this study, a parametric analysis and process characterisation was conducted of VSA for CO2 capture from a variety of gas steams, using the commercial zeolite 13X-APIII as a benchmark adsorbent. Because deep vacuum levels (<5kPa) is not practical at large scale, vacuum pressures of up to 25kPa were tested in our experiments; inlet CO2 concentrations of 15%, 30% and 50% with varying operation temperatures from 20 to 120°C were studied to cover the range of concentration and temperatures expected in industry. The studies were conducted using both singl..