CO2 capture from humid flue gases and humid atmosphere using a microporous coppersilicate

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Science  16 Oct 2015:
Vol. 350, Issue 6258, pp. 302-306
DOI: 10.1126/science.aab1680

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  • CO2 capture: Challenge of co-reduction
    • Bingtao Zhao, Pollution Control Scientist, School of Energy and Power Engineering, University of Shanghai for Science and Technology

    In their report “CO2 capture from humid flue gases and humid atmosphere using a microporous coppersilicate” (16 Oct 2015, p. 302.), Datta et al. writes that the new microporous coppersilicate adsorbent can readily adsorb both H2O and CO2 but does not have H2O/CO2-sharing sites. CO2 adsorption also faces the challenge of co-capture particularly from real flue gases.

    In addition to the greenhouse gas CO2, real flues gases, e.g., from a power plant, contain the air pollutants such as SO2, NOx (primarily NO and NO2), mercury (elemental and oxidized) as well as particulate matter (PM). To date, it has been demonstrated that the integrated capture of those pollutants and CO2 could be more technic-Economical, e.g., by reducing approximately 17.4% of the total cost, as compared to the separately capture in series (1). In spite of that it has high CO2 capture performance with hydrothermal stability and reusability, this new adsorbent will be faced with the challenges once applied to integrated capture of CO2 from real flue gas: Can the absorbent be effectively modified as a high-performance adsorbent which simultaneously captures SO2, NO2 and CO2 and H2O without competitive interferences in flue gas? In case of coexistence of these air pollutants and greenhouse gas, what are the microcosmic mechanisms to accurately characterize their co-adsorption behaviors? Additionally, how is the net contribution to or combined effect on total CO2 emission reduction when comprehensively c...

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    Competing Interests: None declared.