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A study on the fluidization of centrifugal fluidized bed for reduction of exhaust gas from diesel powered vehicle

경유차 배기가스 저감용 원심유동층 촉매반응장치의 유동특성에 관한 연구

  • Rhee, Kwan-Seok (Division of Mechanical and Automotive, Kongju National University) ;
  • Kum, Sung-Min (Division of Mechanical and Automotive, Kongju National University)
  • 이관석 (공주대학교 기계자동차공학부) ;
  • 금성민 (공주대학교 기계자동차공학부)
  • Received : 2015.12.07
  • Accepted : 2016.02.04
  • Published : 2016.02.29

Abstract

The characteristics of fluidization in a centrifugal fluidized bed with a 184 mm inner diameter, 50 mm width of the gas distributor was observed by photographs and experimental works using Cu-ZSM-5 zeolite catalysts with a mean diameter of $26{\mu}m$ and $32{\mu}m$ as bed materials at a rotor at 400rpm and 600rpm. Under these experimental ranges, the experimental results clearly showed the effects of the number of rotation of the rotor on the behavior of bubbles in the centrifugal fluidized bed. As the number of rotations of the rotor increased, the gas velocity at which bubbles begin to be formed also increased but the diameter of the bubbles decreased. In addition, the size of the bubbles in the centrifugal fluidized bed were relatively smaller than those in the conventional bubbling fluidized bed.

경유자동차의 질소산화물을 저감하기위한 원심유동층장치를 개발하기 위해, 가스분산판 내경 184mm, 폭 50mm의 원심유동층장치에서 평균입자직경 $26{\mu}m$, $32{\mu}m$의 Cu-ZSM-5 제오라이트 촉매를 유동입자로 사용하여 원심유동층의 유동특성을 조사한 결과, 원심유동층내의 기포직경은 거의 0.3~3.0mm의 작은 범위이며, 기포의 상승속도는 기포직경 및 가스속도와 상관없이 0.0~0.4m/s 정도이다. 또한 원심유동층에서 사용가능한 평균입자 직경은 $60{\mu}m$이며, 층내에서 기체와 고체의 접촉은 양호한 것으로 조사되었다.

Keywords

References

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