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http://dx.doi.org/10.11629/jpaar.2014.10.2.075

Analysis of the Effect of Particle Size and Humidity on Reaction Characteristics of $CaCO_3$ Sorbent Particle under Air and $O_2/CO_2$ Atmospheric Conditions  

Jeong, Seongha (Department of Mechanical Engineering, KAIST)
Lee, Kang Soo (Department of Mechanical Engineering, KAIST)
Keel, Sangin (Environmental and Energy Systems Research Division, Korea Institute of Machinery and Materials)
Yun, Jin Han (Environmental and Energy Systems Research Division, Korea Institute of Machinery and Materials)
Kim, Sang Soo (Department of Mechanical Engineering, KAIST)
Publication Information
Particle and aerosol research / v.10, no.2, 2014 , pp. 75-82 More about this Journal
Abstract
It is necessary to find out the reaction characteristics of $CaCO_3$ sorbent particles in air and $O_2/CO_2$ atmospheric conditions in order that an in-furnace desulfurization technique can be applied to oxy-fuel combustion system. In this study, rate of change of GMD(geometric mean diameter) and specific surface area of $CaCO_3$ sorbent particles reacted in DTF(drop tube furnace) experimental setup were analyzed to investigate the effect of particle size and humidity on the reaction characteristics of them. In air atmospheric condition, calcination process occurs actively within shorter residence times as the particle size increases. On the contrary, in $O_2/CO_2$ atmospheric condition, a calcination process is delayed as particle size increases. The increment of humidity accelerates calcination process in an air atmospheric condition and increase rate of calcination in an $O_2/CO_2$ atmospheric condition.
Keywords
Calcination; $CaCO_3$ sorbent particles; $O_2/CO_2$ combustion; Humidity; Particle size;
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