서지주요정보
Cu / ZnO 촉매상에서의 고급알코올 생성 반응기구 연구 = A study on the mechanism of higher alcohol formation over Cu / ZnO
서명 / 저자 Cu / ZnO 촉매상에서의 고급알코올 생성 반응기구 연구 = A study on the mechanism of higher alcohol formation over Cu / ZnO / 정문조.
저자명 정문조 ; Chung, Moon-Jo
발행사항 [대전 : 한국과학기술원, 1992].
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등록번호

8002478

소장위치/청구기호

학술문화관(문화관) 보존서고

DCE 92021

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초록정보

Experimental investigation has been carried out in order to elucidate the reaction mechanism of higher alcohol (mixture of $C_1-C_6$ alcohols) formation from syngas over Cu/ZnO catalysts. $^{13}CH_3OH$ and $D_2O$ were used to investigate the behavior of $C_1$ oxygenated species and the dehydrogenation characteristics of $C_2$ oxygenated species, respectively. In the reaction between $C_1$ oxygenated species, only methylformate was formed as a coupled product, and it was found from the $^{13}C$ labeling study that the major reaction route was methanol-formaldehyde reaction over Cu under lower CO pressure, and the methanol-CO reaction over ZnO under higher CO pressure. The major route of methylformate formation over ZnO changed from methanol-CO reaction to methanol-formaldehyde reaction with increasing temperature. In the reaction between $C_2$ oxygenated species, many kinds of higher oxygenates were formed as coupled products. The coupling reaction was promoted markedly by the interaction of Cu and ZnO, but the dissolved copper in the ZnO lattice did not play any crucial role. It was found from the H-D exchange study that the dehydrogenation takes place mostly on the α-carbon over Cu, while on the β-carbon over ZnO. The reaction mechanism for the coupling of $C_2$ species was proposed on the basic assumptions comprised of (1) metal-oxygen bond adsorption of the reaction intermediates, (2) nucleophilic addition of β-carbon to the electrophilic α-carbon, and (3) bond cleavage at the weakest point between the two adsorption sites. The proposed reaction mechanism could be also applied to the chain growth scheme in higher alcohol formation from syngas, and most of the product formations could be explained systematically.

서지기타정보

서지기타정보
청구기호 {DCE 92021
형태사항 vii, 243 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Moon-Jo Chung
지도교수의 한글표기 : 임선기
공동교수의 한글표기 : 박건유
지도교수의 영문표기 : Son-Ki Ihm
공동교수의 영문표기 : Kun-You Park
학위논문 학위논문(박사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 223-233
주제 Alcohols.
Couplings.
촉매. --과학기술용어시소러스
고급 알콜. --과학기술용어시소러스
커플링 반응. --과학기술용어시소러스
Catalysts.
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