화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Clean Technology, Vol.19, No.2, 165-172, June, 2013
Export Citation
고정층 반응기에서 K-계열 흡수제의 압력에 따른 HCl 흡수 거동 연구
Effect of Pressure on HCl Absorption Behaviors of a K-based Absorbent in the Fixed Bed Reactor
김재영, 박영철, 조성호, 류호정, 백점인1, 박영성2, 문종호†
  • 한국에너지기술연구원 온실가스연구단, 305-343 대전광역시 유성구 가정로 102
  • 1한국전력공사 전력연구원, 305-380 대전광역시 유성구 문지동 103-16
  • 2대전대학교 환경공학과, 300-716 대전광역시 동구 용운동 96-3
Jae-Young Kim, Young Cheol Park, Sung-Ho Jo, Ho-Jung Ryu, Jeom-In Baek1, Yeong Seong Park2, and Jong-Ho Moon†
  • Greenhouse Gas Center, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Korea
  • 1Korea Electric Power Research Institute, 103-16 Munji-dong, Yuseong-gu, Daejeon 305-380, Korea
  • 2Department of Environmental Engineering, Daejeon University, 96-3 Yongun-dong, Dong-gu, Daejeon 300-716, Korea
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초록
본 연구에서는 고정층 반응기(높이 15 cm, 내경 0.5 cm)에서 K-계열 건식 흡수제(K2CO3/Al2O3, 한국전력공사 전력연구원)를 이용하여 반응압력 변화에 따른 염화수소 흡수 실험을 수행하였다. 반응온도는 가스화 직후, 필터를 거쳐서 주입되는 것을 가정하여 400 ℃로 설정하였으며, 반응기체 농도는 750 ppm HCl (N2 balance)으로 설정하였다. 반응압력은 1, 5, 10, 15, 20 bar로 증가시켰다. 압력이 증가할수록 K-계열 흡수제의 흡수 성능이 증가하였다. 흡수제를 구성하고 있는 주요 물질인 K2CO3가 HCl 가스와 반응하여 KCl 결정을 형성하였으며, 강한 결합에너지로 인하여 흡수제의 재생이 실질적으로 불가능 하였다. 이에 대한 광학적, 물리적, 화학적 특성을 SEM, EDX, BET, TGA, XRD를 이용하여 분석하였다. 400 ℃, 20 bar 조건(가스화 이후 탈할로겐 공정의 온도 및 압력조건)에서 K2CO3 흡수제는 Ca 계열 및 Mg 계열의 흡수제에 비해 높은 HCl 흡수능 및 HCl/N2 분리 거동을 보였다.
In this study, the hydrogen chloride removal using K-based dry sorbents (K2CO3/Al2O3, KEPRI, Korea) was studied with varying the pressure in a fixed bed reactor (15 cm tall bed with 0.5 cm I.d.). Working temperature was 400℃ and feed gas concentration was 750 ppm (HCl vol%, N2 balance). The chloride sorption capacity of sorbent increases with increasing pressure (1, 5, 10, 15 and 20 bar). Also, after forming KCl crystal by reaction with K2CO3 and HCl, owing to the strong bonding energy, sorbent regeneration was practically impossible. Its optical, physical and chemical characterizations were evaluated by SEM, EDAX, BET, TGA and XRD. At 400 ℃ and 20 bar condition, working condition for the dehalogenation process after gasification, K-based dry sorbent showed high HCl sorption capacity and HCl/N2 separation performances comparing with Ca-based and Mg-based dry sorbents.
Keywords:Hydrogen chloride (HCl);Fixed bed reactor;K-based absorbent;Pressure;Pre-combustion CO2 capture
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