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유동층 반응기에서 세 가지 석회석의 CO<sub>2</sub> 흡수능력에 미치는 반복횟수와 SO<sub>2</sub> 농도의 영향
류호정,Ryu, Ho-Jung 한국공업화학회 2006 공업화학 Vol.17 No.1
유동층 반응기에서 세 가지 석회석의 $CO_2$ 흡수능력에 미치는 반복횟수와 $SO_2$ 농도의 영향을 연구하였다. 측정된 $CO_2$ 흡수능력은 반복횟수가 증가하고 $SO_2$ 농도가 증가함에 따라 감소하였다. 한편 $SO_2$ 흡수능력은 반복횟수와 $SO_2$ 농도가 증가함에 따라 증가하였다. 총괄칼슘이용률은 반복횟수가 증가함에 따라 감소하였으나 총괄칼슘이용률에 대한 $SO_2$ 농도의 영향은 석회석의 종류에 따라 다른 경향을 나타내었다. Strassburg 석회석의 경우 총괄칼슘 이용률은 $SO_2$ 농도가 증가함에 따라 감소하는 반면, Luscar 및 단양 석회석의 경우에는 본 연구의 실험범위 내에서 $SO_2$ 농도에 무관한 경향을 나타내었다. 본 연구의 실험결과에 의하면 연소배가스 중 $SO_2$의 존재는 석회석의 $CO_2$ 흡수능력을 감소시키며 석회석의 황하반응 경향이 $CO_2$ 흡수능력에 영향을 미치는 것으로 나타났다. Effects of multiple-cycle operation and $SO_2$ concentration on $CO_2$ capture characteristics of three limestones were investigated in a fluidized bed reactor. For each of these sorbents, the measured $CO_2$ capture capacity decreased as the number of cycles increased and as the $SO_2$ concentration increased. On the other hand, the $SO_2$ capture increased with the increased number of cycles and the $SO_2$ concentration. The total calcium utilization decreased as the number of cycles increased, but the effect of $SO_2$ concentrations on the total calcium utilization depended on the type of limestone. For Strassburg limestone, the total calcium utillization decreased with increasing $SO_2$ concentration. However, for Luscar and Danyang limestones, the total calcium utilization was almost independent of $SO_2$ concentration for the range investigated. The results showed that $SO_2$ in flue gas reduced the $CO_2$ capture capacity of limestone and that the sulfation pattern affected the $CO_2$ capture capacity.
케미컬루핑 연소시스템을 위한 두 가지 산소전달입자들의 고체순환 특성
류호정,이도연,남형석,조성호,백점인,RYU, HO-JUNG,LEE, DOYEON,NAM, HYUNGSEOK,JO, SUNG-HO,BAEK, JEOM-IN 한국수소및신에너지학회 2018 한국수소 및 신에너지학회논문집 Vol.29 No.4
To confirm the operating range of two oxygen carriers for chemical looping combustion system, the effects of operating variables on solid circulation rate were measured and discussed using a two-interconnected circulating fluidized bed system at ambient temperature and pressure. Moreover, suitable operating ranges to avoid choking of the fast fluidized bed (air reactor) were confirmed for two oxygen carriers. A continuous long-term operation of steady-state solid circulation more than 24 hours was also demonstrated within the operating windows. Finally we could confirm that those two oxygen carriers are suitable for chemical looping combustion system with high solid circulation rate and smooth solid circulation.
기포유동층 반응기에서 산소전달입자의 기체연료별 환원반응 특성
류호정(Ho-Jung Ryu),김하나(Hana Kim),이도연(Doyeon Lee),조성호(Sung-Ho Jo),이승용(Seung-Yong Lee),백점인(Jeom-In Baek) 한국에너지기후변화학회 2021 에너지기후변화학회지 Vol.16 No.1
Reduction characteristics of oxygen carrier particle for different gaseous fuels such as methane, syngas and LPG were measured in a bubbling fluidized bed reactor. For all gaseous fuels, high CO₂ selectivity was achieved at high temperature more than 800 °C. Moreover, CO₂ selectivity decreased as the temperature decreased and as the fuel flow rate increased because limitation of oxygen supply from the oxygen carrier. However, CO₂ selectivity increased as the solid height in the reactor increased due to the increment of oxygen supply from more oxygen carrier and the increment of gas residence time in the reactor. Consequently, we could conclude that the high reaction temperature, low gas velocity, and high oxygen carrier inventory are preferable to ensure high reactivity of oxygen carrier in the fuel reactor.