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Received September 2, 2010
Accepted October 2, 2010
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세리아 첨가 제오라이트 촉매를 이용한 디메틸 에테르 합성
Dimethyl Ether Formation Using a Zeolite Catalyst Impregnated with Ceria
한국화학연구원 그린화학연구단, 305-600 대전광역시 유성구 장동 100 1충남대학교 화학공학과, 305-764 대전광역시 유성구 궁동 220
Green Chemistry Research Division, KRICT, 100 Jang-dong, Yuseong-gu, Daejeon 305-600, Korea 1Department of Chemical Engineering, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 305-764, Korea
mwhan@cnu.ac.kr
Korean Chemical Engineering Research, April 2011, 49(2), 155-160(6), NONE Epub 12 April 2011
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Abstract
디메틸 에테르(DME)는 최근 청정 연료로서 주목을 받고 있다. 본 연구에서는 메탄올 탈수반응을 통한 디메틸 에테르(DME)의 제조에 대하여 조사하였다. 이때 촉매는 제올라이트 계열인 고체산 촉매를 이용하였다. 조촉매로서 세리아가 반응전환율뿐만 아니라 DME 생성 선택도도 증가시키는 것을 발견하였다. 실리카/알루미나의 조성비와 촉매 표면의 세리아의 무게함량을 변화시켜 최적의 촉매를 선정하였다. 5 wt%의 세리아가 첨가된 ZSM5-30의 DME에 대한 반응선택성이 가장 뛰어났으며, 이 촉매는 메탄올 내에 포함되어 있는 수분의 영향을 거의 받지 않았다. 마이크로 반응기에서 얻은 데이터를 가지고 반응 속도식을 구하였다.
Dimethyl ether draws an attention as a green fuel in recent years. In this study, we investigated dehydration of methanol to produce DME using solid-acid catalysts, a series of zeolite. We found that ceria took a role of promoting the reaction conversion as well as selectivity of DME formation as a cocatalyst to the zeolite catalyst. We varied Si/Al ratio and ceria percentage on the surface of the catalyst to get high performance catalyst. ZSM5-30 with 5 wt% ceria on the surface was found to have excellent DME selectivity and to be little influenced by water content in methanol_x000D_
feed. We proposed a reaction model and obtained kinetic parameters for the DME formation using the catalyst based on experimental results using a microreactor.
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Jun KW, Lee HS, Roh HS, Park SE, Bull. Korean Chem. Soc., 23, 803 (2002)
Xu MT, Lunsford JH, Goodman DW, Bhattacharyya A, Appl. Catal. A: Gen., “Synthesis of Dimethyl Ether (DME) from Methanol over Solid-acid Catalysts.", 149(2), 289 (1997)
Koo Y, Han M, Korean Chem. Eng. Res., “Dimethyl Ether Production Using a Reactive Distillation Process.", 42(1), 44 (2004)
Yaripour F, Baghaei F, Schmidt I, Perregaard J, Catal. Commun., “Catalytic Dehydration of Methanol to Dimethyl Ether(DME) over Solid-acid Catalysts.", 6, 147 (2005)
Semelsberger TA, Ott KC, Borup RL, Greene HL, Appl. Catal. B: Environ., “Role of Acidity on the Hydrolysis of Dimethyl Ether(DME) to Methanol.”, 61(3-4), 281 (2005)
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