Speakers

CO2 Capture from Humid Flue Gases and Humid Atmosphere using a Microporous Coppersilicate and Conversion of Solar Energy to Hydrogen

Kyungbyung_Yoon - 복사본
Kyung Byung Yoon
Sogang University, Korea
11:25~12:10,November 20th, 2015

Abstract:

In an effort to curtail the increase in atmospheric CO2 concentrations, economic methods need to be developed to capture CO2 from flue gas and the atmosphere. One possible approach involves the capture of CO2 by using physical adsorption on microporous materials that have high surface areas. To date, various materials which possess high CO2 sorption capabilities have been developed. However, these materials require the incoming gas stream to be completely dehydrated as water causes

In an effort to curtail the increase in atmospheric CO2 concentrations, economic methods need to be developed to capture CO2 from flue gas and the atmosphere. One possible approach involves the capture of CO2 by using physical adsorption on microporous materials that have high surface areas. To date, various materials which possess high CO2 sorption capabilities have been developed. However, these materials require the incoming gas stream to be completely dehydrated as water causes drastic reduction in the CO2 sorption capabilities or may even promote their decomposition. Although such moisture-sensitive CO2 sorbents can still be used to capture CO2 directly from non-pretreated humid flue gases by charging the column with a water-sorbing layer before the CO2-sorbing layer, the use of a single moisture-insensitive layer would be preferable. Thus, capturing CO2 from humid flue gases and atmosphere without prior dehydration of the gases is necessary to reduce capture costs. A highly stable microporous coppersilicate which has H2O-specific and CO2-specific adsorption sites but not H2O/CO2-sharing sites will be introduced. It readily adsorbs both H2O and CO2 from the humid flue gases and atmosphere but the adsorbing H2O does not interfere with the adsorption of CO2. It is also highly stable after adsorption of H2O and CO2 because it was synthesized hydrothermally.

The solar electricity driven water electrolysis is receiving great attention as a means to mitigate the rapid climate change caused by the severe use of fossil fuels. For this method to be practically used in industry their overpotential and production cost should be low. A heavy duty stainless-steel based hydrogen production cathode with very low overpotentials at high current densities will be introduced.

 

Professional Experience:

  • 2015-present Member, Editorial Board , Energy and Environmental Science (EES)
  • 2013-present Associate Editor, Current Opinion in Colloid & Interface Science (COCIS)