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Search / Korean Journal of Chemical Engineering
HWAHAK KONGHAK,
Vol.34, No.4, 435-442, 1996
고온석탄가스에서 아연계 탈황제에 의한 H2S의 제거
Re- moval of H2S by Zinc-Based Sorbents from High Temperature Coal-Derived Gases
이태진, 박노국, 김장희, 김기석, 박영우, 이창근
복합금속산화물인 zinc ferrite와 zinc titanate 탈황제를 사용하여 석탄가스에서 H2S의 제거 가능성을 연구하였다. 고온가스에 함유한 H2S와 탈황제의 반응에 있어서 최적반응온도를 찾기 위해서 500-750℃ 범위에서 조사하였으며, 실험결과 zinc ferrite와 zinc titanate의 H2S제거 효율은 각각 550℃와 650℃에서 최적조건을 나타내었다. 또한 SEM과 BET분석을 통해서도 최적온도에 대한 입자의 특징을 확인할 수 있었다. 황하-재생의 연속반응 10-cycle 실험은 탈황제의 연속적인 사용가능성을 평가하기 위해서 충전층 반응기에서 수행하였으며 표본시료에 대한 BET표면적, XRD, SEM 등의 분석도 같이 수행하였다. 황화-재생반응의 cycle이 반복되는 동안 zinc ferrite는 탈황제의 화학적 변형으로 인해서 황수용 능력이 증가하는 특이한 결과가 나타났으며, zinc titanate는 연속적인 cycle에서 거의 일정한 황수용 능력을 보였다.
Removal of H2S by mixed-metal oxides was studied experimentally to demonstrate the potential use of zinc ferrite and zinc titanate as a sorbent in high temperature desulfuri- zation of coal gas. To find optimal temperature, the reactions of sorbents with a hot gas con- taining H2S were investigated over a temperature range of 500-750℃. The experimental results showed that optimal H2S removal efficiency of zinc ferrite and zinc titanate sorbents was obtained at 550℃ and 650℃ respectively, and SEM and BET analyses were in accord with this feature. Ten cycles of sulfidation and regeneration were sequentially conducted in the packed-bed reactor to determine the long-term performance of the sorbents. A series of characterizations were also performed sample including BET surface area, XRD, and SEM. Zinc ferrite sorbent exhibited a significant rise in sulfur capacity during the repeated cycles of absorption and regeneration due to the chemical transformations of the sorbent, while zinc ti- tanate sorbent showed nearly constant sulfur capacity with the successive cycle operation.
Keywords: H2S Removal; Zinc Ferrite; Zinc Titanate; Absorption and Regeneration
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  2. Choi JH, Yi CK, Son JE, Kim SD, HWAHAK KONGHAK, 38(5), 698, 2000
  3. Lim CJ, Cha YK, Park NK, Ryu SO, Lee TJ, Kim JC, HWAHAK KONGHAK, 38(1), 111, 2000
  4. Oh SC, Lee HP, Kim HT, Lee JB, Yoo KO, HWAHAK KONGHAK, 38(1), 117, 2000
  5. Jo SH, Lee BH, Jin GT, Yi CK, HWAHAK KONGHAK, 39(6), 739, 2001
  6. Yi CK, Park J, Cho SH, Jin GT, Son JE, HWAHAK KONGHAK, 37(1), 81, 1999
  7. Na JI, Park SJ, Wi YH, Yi CK, Lee TJ, HWAHAK KONGHAK, 37(4), 499, 1999
  8. Jo SH, Lee BH, Lee JB, Ryu CK, Jin GT, Yi CK, HWAHAK KONGHAK, 40(2), 231, 2002
  9. Kang SH, Rhee YW, Kang Y, Han KH, Lee CK, Jin GT, HWAHAK KONGHAK, 35(5), 642, 1997
  10. Lee TJ, Kwon WT, Chang WC, Kim JC, Korean Journal of Chemical Engineering, 14(6), 513, 1997
  11. Kim BS, Lee JD, Park NK, Ryu SO, Lee TJ, Kim JC, HWAHAK KONGHAK, 41(5), 572, 2003
  12. Kim BS, Lee JD, Jun JH, Park NK, Ryu SO, Lee TJ, Kim JC, Korean Chemical Engineering Research, 42(2), 139, 2004
  13. Park YS, Jo SH, Son JE, Yi CK, Korean Chemical Engineering Research, 47(6), 710, 2009
  14. Kyung DH, Kim JY, Jo SH, Park YC, Moon JH, Yi CK, Baek JI, Korean Chemical Engineering Research, 50(3), 492, 2012
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