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Received September 26, 2006
Accepted December 13, 2006
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메탄올 자열 개질 반응기에서의 온도제어
Temperature Control in Autothermal Reforming Reactor
경북대학교 화학공학과, 702-701 대구시 북구 산격동 1370
Department of Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-gu, Daegu 702-701, Korea
jtlee@knu.ac.kr
Korean Chemical Engineering Research, February 2007, 45(1), 12-16(5), NONE Epub 5 March 2007
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Abstract
Copper-Zinc Oxide를 촉매로 사용하는 메탄올 자열 개질 반응기의 온도제어 연구를 하였다. 반응기 hot-spot에서 1 cm 벗어난 지점의 반응기 내부 온도를 피제어변수로, 공기 유량을 조작변수로 사용하였다. 일차 시간 지연 모델을 얻었으며, 이로부터 IMC-PI 법을 적용하여 제어기 값을 구할 수 있었다. 이 제어기로 100시간 이상 개질 반응기 내부의 온도를 ± 5 ℃ 내에서 제어할 수 있었다. 촉매활성의 저하로 인한 hot-spot 지점의 변화를 조사하여, 적응 제어의 설계에 이용할 수 있게 하였다.
Temperature control of an autothermal methanol reforming reactor which uses the copper-zinc oxide catalyst was studied. Temperature at 1cm below the hot-spot point in the reactor was used for the controlled variable, and the air flow rate was used for the manipulated variable. A first order plus time delay model was identified and controller parameters were obtained by applying the IMC-PI tuning rule to the identified model. With this controller, we could control the reforming reactor temperature within ± 5 ℃ over 100 hours. Change of the hot-spot point due to the catalyst degradation was investigated and it could be used to design an adaptive controller.
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