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Rational design of a porous gel encapsulated bio-hybrid solvent for accelerated CO2 capture and low energy stripping

P. Sahoo,Ravindra Kumar,M. Kumar,S. Puri,S. Ramakumar

Published 2019 in International Journal of Greenhouse Gas Control

ABSTRACT

Abstract The removal of CO2 has become an essential step in many industrial processes including flue gas separation, natural gas, and biogas purification in view of environmental concern. The most commonly used process for CO2 capture is by amine solvents. The amine-based process has inherent limitations such as oxidative or thermal degradation of solvent and energy-intensive solvent regeneration. In the present study, a polymeric porous gel (PPG) was developed using polyvinyl alcohol (PVA) and agarose (AG). This gel showed very high activity for CO2 capture when modified with a sterically hindered amine ‘2-amino-2-methyl-1-propanol’ (AMP) and a thermo-stable enzyme ‘carbonic anhydrase’ (CA) (AMP + CA hereafter designated as bio-hybrid solvent). PPG shows a high porosity of 86% and efficiently encapsulated the bio-hybrid solvent (HS). The resulting material (PPG/HS) shows CO2 uptake of 9.3 wt% and stripping at relatively low temperature. This gel has further ability to regain its porosity once reached to room temperature. Moreover, the oxidative degradation studies confirmed that PPG can significantly enhance the stability of encapsulated amines.

PUBLICATION RECORD

  • Publication year

    2019

  • Venue

    International Journal of Greenhouse Gas Control

  • Publication date

    2019-11-01

  • Fields of study

    Chemistry, Engineering, Environmental Science

  • Identifiers
    DOI 10.1016/J.IJGGC.2019.102785
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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