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HWAHAK KONGHAK,
Vol.41, No.1, 129-133, 2003
Vol.41, No.1, 129-133, 2003
펠렛형 제올라이트를 이용한 이산화황의 흡착특성
Adsorption Characteristics of Sulfur Dioxide on Pellet Type Zeolites
KA, NaA, CaA 및 NaX 제올라이트가 충전된 실험실 규모의 흡착층을 이용하여 SO2 유입농도, 충전층 높이 및 공간속도를 변화시키면서 SO2 흡착실험을 수행하였다. 평형흡착량과 파과시간 모두 제올라이트 세공크기에 따라 KA, NaA, CaA, NaX 순으로 증가하였다. NaX상에서 SO2를 흡착시킬 경우 SO2 유입농도 504 ppm 이하에서 파과시간은 증가하나 역시 물질전달범위도 증가하여 물질전달 속도는 감소하였다. Wheeler 식으로부터 제올라이트상의 파과시간에 대한 평형흡착량, 공간속도 및 1/C0의 관계를 확인한 결과, 504 ppm 이상보다 504 ppm 이하의 저농도에서 파과시간이 상대적으로 증가하였다.
The experimental of SO2 adsorption, with varying SO2 concentration, packed-bed depth, and space velocity, was carried out using a lab-scale fixed bed with zeolites, such as KA, NaA, CaA and NaX. Both of an equilibrium adsorption capacity and a breakthrough time increased with zeolite pore size, in order of KA, NaA, CaA and NaX. Breakthrough time of NaX increased under
SO2 concentration of 504 ppm, but mass transfer rate decreased due to expansion of mass transfer zone. Breakthrough time is relatively increased in the low gas concentration(<504 ppm) more than high concentration(>504 ppm), which is proved by the effects of equilibrium adsorption capacity, space velocity and 1/C0 for the zeolite from the relationship of Wheeler equation.
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