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고온건식탈황 유동층 반응기 설계를 위한 zinc titanate 탈황제의 반응특성 연구

Reaction Characteristics of Zinc Titanate Sorbent for the Design of a Hot Gas Desulfurization Fluidized Reactor

이창근 박재현 조성호 진경태 손재익

Yi CK Park J Cho SH Jin GT Son JE

HWAHAK KONGHAK, February 1999, 37(1), 81-86(6), NONE

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Abstract

고온고압 유동층 탈황반응기에서 구해진 실헙자료와 semi-batch 유동층 탈황모델을 제시하여 탈황제의 반응속도상수를 구하였고 TGA로부터 나온 값과 비교를 하였다. 내경 7.5 cm 크기의 유동층 반응기로부터의 황화실험결과를 비교하여 얻어진 반응속도상수(k_s)는 1,276cm³ gas/gmole H₂S/sec이었고, TGA에서 얻은 값과는 5배정도의 작은 값을 보였다. 이렇게 실험으로부터 구해진 반응속도상수치는 유동층내의 기포특성, 물질전달 등의 효과들을 함유한 실험치이기 때문에 scale-up 설계에 유용하게 이용할 수 있다. 제안한 모델을 사용하여 각 조업변수들이 유동층 반응기 성능에 미치는 민감도를 분석하였다.

A reaction rate of a zinc titanate sorbent with H₂S for scale-up design was obtained from a simplified semi-batch fluidized reaction model and experimental data from a hot gas desulfurization fluidized bed reactor at high pressure condition. The global reaction rate from a fluidized bed reactor of 7.5 cm inside diameter was 1,276 cm³ gas/gmole H₂S/sec, which is 5 times smaller than that from TGA. The global reaction rate can be used in the design for the scale-up because the reaction rate includes the effects in fluidized bed such as bubble charateristics, mass transfer, entrainments, and solid mixing etc. Sensitivity of parameters on a fluidized reactor performance was analyzed with the simplified model.

Keywords

Hot Gas Desulfurization Global Reaction Rate Zinc Titanate Fluidized Bed Reactor H₂S Removal Semi-Batch Fluidized Bed Reaction Model

References

Gupta RP, Gangwal SK, "Enhanced Durability of Desulfurization Sorbents for Fluidized-Bed Applications," DOE Report, DOE/MC/25006-3271 (1992)
Lee TJ, Park NK, Kim JH, Kim KS, Park YW, Yi CK, HWAHAK KONGHAK, 34(4), 435 (1996)
Kang SH, Rhee YW, Kang Y, Han KH, Lee CK, Jin GT, HWAHAK KONGHAK, 35(5), 642 (1997)