CRCU

Chemical Research in Chinese Universities ›› 2012, Vol. 28 ›› Issue (1): 129-132.

• Articles • Previous Articles     Next Articles

Separation of H2O/CO2 Mixtures with Layered Adsorption Method for Greenhouse Gas Control

XU Dong1,2, ZHANG Jun2, LI Gang2, XIAO Penny2, ZHAI Yu-chun1*   

  1. 1. School of Material and Metallurgy, Northeastern University, Shenyang 110004, P. R. China;
    2. Department of Chemical Engineering, Monash University, Victoria 3800, Australia
  • Received:2011-01-04 Revised:2011-09-22 Online:2012-01-25 Published:2011-12-27
  • Contact: Dong XU E-mail:zhaiyc@smm.neu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.51074205) and the Fund of Corporate Research Centre for Greenhouse Gas Technology, Australia.

PDF (PC)

Abstract: Multiple-layered vacuum swing adsorption technique was used and investigated in order to effectively keep the feed gas that flows into zeolite 13X zone being dry and keep the CAPEX down(not adding pre-treatment equipment). Activated carbon fiber(ACF) and alumina CDX were laid at the lower parts of the column as pre-layers to selectively adsorb moisture. Zeolite 13X was laid on the top of those two adsorbents as the main layer to capture CO2. Systematic cyclic experiments show that water vapor was successfully contained within the ACF and CDX layers at cyclic steady states. It was also found that ultimate vacuum pressure played a decisive factor for stabilizing the water front, and achieving good CO2 purity and recovery. The findings also reveal the pathway for large-scale CO2 capture process.

Key words: Separation, Carbon dioxide, Water vapor, Vacuum swing adsorption