CO2 Capture with Structured Sorbents Containing Multiwalled Carbon Nano Tubes and Polyethyleneimine (PEI)

Abstract

In this work monolithic adsorbents containing polyethyleneimine (PEI) and multiwalled carbon nanotubes obtained by 3D printing. CO2 and N2 isotherms were measured using a commercial volumetric apparatus. Breakthrough experiments were carried out with a synthetic flue gas containing 15% CO2 and the rest N2. The information was used to simulate and optimize a 6-step Vacuum swing Adsorption (VSA) cycle for postcombustion CO2 capture from a flue gas stream containing 15% CO2 and 85% N2. Detailed process optimization revealed that it was indeed possible to achieve 95% CO2 purity and 90% CO2 recovery targets.