서지주요정보
Y 제올라이트에 담지된 나노미터 크기의 루테늄 금속 클러스터의 반응성 = Reactivities of ruthenium metal clusters of nanometer size supported on the Y zeolite
서명 / 저자 Y 제올라이트에 담지된 나노미터 크기의 루테늄 금속 클러스터의 반응성 = Reactivities of ruthenium metal clusters of nanometer size supported on the Y zeolite / 조일현.
저자명 조일현 ; Cho, Ihl-Hyeon
발행사항 [대전 : 한국과학기술원, 1993].
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소장정보

등록번호

8003894

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 93042

SMS전송

도서상태

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초록정보

The size dependence of activities and selectivities in the hydrogenation of cyclopropane (CP) was studied on the precisely controlled and measured ruthenium clusters of nanometer size supported on NaY zeolite over reaction temperature from 200 K to 240 K. The hydrogenolysis of ethane was also studied over reaction temperature from 423 K to 473 K with the same method as CP hydrogenation. The existence of ruthenium metal clusters in t zeolite supercage was proved by $^{129}Xe$ NMR and the cluster size (number of atoms) was determined by the xenon adsorption method. For the clusters of between 20 and 200-atom size, the activity for ethane hydrogenolysis decreased as the cluster size decreased. However, the activity for CP hydrogenation to propane increased as the cluster size decreased from 55-atoms to 2-atoms. At the temperature close to 200 K, the fragmentation of CP into methane was dominant. This reaction did not occur in the metal clusters on the external surface of zeolite crystal. The selectivity for propane increased as the reaction temperature became close to 240 K. The selectivities were remained constant with the change of cluster size. The activation energies for CP hydrogenation and ethane hydrogenolysis were almost constant for different cluster size, which indicates that the reaction paths were same for all different size clusters.

서지기타정보

서지기타정보
청구기호 {MCHE 93042
형태사항 vii, 63 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A, Drawing for the NMR tube, vacuum/adsorption rig and flow-recirculation system. - B, Cluster size determination by xenon adsorption method. - C, Typical chromatogyam for ethane hydrogenoltsis and cyclopropane hydrogenation
저자명의 영문표기 : Ihl-Hyeon Cho
지도교수의 한글표기 : 박승빈
지도교수의 영문표기 : Seung-Bin Park
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 50-55
주제 Zeolites.
Hydrogenation.
제올라이트. --과학기술용어시소러스
수소화. --과학기술용어시소러스
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