| 초록 |
CO2 from the combustion of fossil fuel has been a primary source for global warming. Various CO2 capture technologies have been developed to reduce CO2 emission at the combustion process for power generation. In this work, we have investigated CO2 capture technolohy using NaMg double salt as a dry absorbent. The absorbent was synthesized using simple coprecipitation of sodium carbonate, sodium nitrate and magnesium nitrate under vigorous stirring at low pH. The structrual change of the NaMg salt during absorption process was monitored with in-situ variable temperature X-ray powder diffraction combined FT IR. The result suggested that the reversible transformation of MgO to MgCO3 during the temperature cycle was responsible for the high absorption capacity, 30 wt% while NaNO3 as a catalyst seemed to activate CO2 for the facile absorption. |
