<P><B>Abstract</B></P> <P>The present study proposes a multi-stage CO<SUB>2</SUB> capture process that incorporates heat-exchangeable fluidized-bed reactors. For continuous multi-stage heat exchange, three dr...
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https://www.riss.kr/link?id=A107518403
2015
-
SCOPUS,SCIE
학술저널
704-713(10쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>Abstract</B></P> <P>The present study proposes a multi-stage CO<SUB>2</SUB> capture process that incorporates heat-exchangeable fluidized-bed reactors. For continuous multi-stage heat exchange, three dr...
<P><B>Abstract</B></P> <P>The present study proposes a multi-stage CO<SUB>2</SUB> capture process that incorporates heat-exchangeable fluidized-bed reactors. For continuous multi-stage heat exchange, three dry regenerable sorbents: K<SUB>2</SUB>CO<SUB>3</SUB>, MgO, and CaO, were used to create a three-stage temperature-dependent reaction chain for CO<SUB>2</SUB> capture, corresponding to low (50–150 °C), middle (350–650 °C), and high (750–900 °C) temperature stages, respectively. Heat from carbonation in the high and middle temperature stages was used for regeneration for the middle and low temperature stages. The feasibility of this process is depending on the heat-transfer performance of the heat-exchangeable fluidized bed reactors as the focus of this study. The three-stage CO<SUB>2</SUB> capture process for a 60 Nm<SUP>3</SUP>/h CO<SUB>2</SUB> flow rate required a reactor area of 0.129 and 0.130 m<SUP>2</SUP> for heat exchange between the mid-temperature carbonation and low-temperature regeneration stages and between the high-temperature carbonation and mid-temperature regeneration stages, respectively. The reactor diameter was selected to provide dense fluidization conditions for each bed with respect to the desired flow rate. The flow characteristics and energy balance of the reactors were confirmed using computational fluid dynamics and thermodynamic analysis, respectively.</P> <P><B>Highlights</B></P> <P> <UL> <LI> CO<SUB>2</SUB> capture process is proposed using a multi-stage process. </LI> <LI> Reactor design is conducted considering heat exchangeable scheme. </LI> <LI> Reactor surface is designed by heat transfer characteristics of fluidized bed. </LI> </UL> </P>