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유동층 촉매 반응기에서 촉매가 폐 Polystyrene의 열분해에 미치는 영향

Effects of Catalyst on the Pyrolysis of Polystyrene Wastes in a Fluidized Bed Catalytic Reactor

이찬기 김준식¹ 송평섭 조용준 강용^† 최명재¹

Chan-Gi Lee Jun-Sik Kim¹ Pyung-Seob Song Yong-Jun Cho Yong Kang^† Myoung-Jae Choi¹

충남대학교 화학공학과, 대전 305-764 ¹한국화학연구원 화학기술부 환경자원팀, 대전 305-600

Dept. of Chemical Engineering, Chungnam National University, Daejeon 305-764, Korea ¹Advanced Chemical Technology Division, KRICT, Daejeon 305-600, Korea

HWAHAK KONGHAK, August 2002, 40(4), 445-449(5), NONE

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Abstract

유동층 촉매 반응기에서 일반용 폴리스티렌(GPPS)과 폐 발포 폴리스티렌(EPSW)을 원료로 하여 단순 열분해 및 촉매를 첨가하여 열분해를 수행하였다. 질소와 모래를 각각 유동화 가스와 층물질로 이용하였고, 촉매로는 Fe2O3, BaO, HZSM-5(Si/Al=30)을 사용하였다. 열분해 온도(400-550 ℃)와 가스 유속(0.3-0.6 m/s) 및 촉매 첨가량을 변화시켜 가면서 단순 열분해의 경우와 촉매를 첨가

Catalytic pyrolysis of polystyrene wastes was investigated in a fluidized-bed catalytic reactor. The feed materials were GPPS(general purpose polystyrene) and EPSW(expanded polystyrene waste). Nitrogen and silica sand were used as a fluidized gas and a bed material, respectively. Powder of Fe2O3, BaO or HZSM-5(Si/Al=30) was used as a catalyst. Effects of pyrolysis temperature(400-550 ℃), gas velocity(0.3-0.6 m/s) and amount of catalyst(Fe2O3) on the yields of oil and styrene monomer were determined, comparing with those in non-catalytic pyrolysis. It was found that the yields of oil as well as styrene monomer in the catalytic pyrolysis reactor were higher than those in the reactor without catalyst. The activity of Fe2O3 was higher than that of BaO or HZSM-5, while the BaO was more active than HZSM-5, thus, Fe2O3 was the best one within this experimental conditions. The optimum amount of Fe2O3 was 5 wt% at 450 ℃ when the gas velocity was 0.5 m/s.

Keywords

Catalytic Pyrolysis Polystyrene Wastes Fluidized-Bed Reactor Oil Recovery Styrene Monomer Recovery

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