Enhancement of CO2 capture by using synthesized nano-zeolite

In this study synthesized nano-zeolite was evaluated for its potential use in CO2 capture via temperature swing adsorption. Adsorption equilibria of pure CO2 and mixtures containing 20% by volume CO2 and 80% by volume N-2 were determined in a temperature range of 20-50 degrees C and at pressure 0.1-1.5 atm. The identified adsorption capacity of CO2 by nano-zeolite was 4.81 mmol/g at a temperature of 20 degrees C and at pressure of 1 atm. In addition, the identified selectivity of CO2/N-2 onto nano-zeolite, calculated using ideal adsorbed solution theory (LAST), was 18.65 at 20 degrees C and 1 atm. From analysis of regeneration characteristics of CO2 loaded adsorbent, the percentage removal of CO2 was maintained at more than 88% even after 10 cycles of adsorption-desorption. Therefore, synthesized nano-zeolite with much improved CO2 adsorption capacity and a very high recyclability of CO2 loaded adsorbent can be used as an effective and economical adsorbent for CO2 capture. (C) 2016 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.