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Microemulsion을 이용한 신규 촉매 제조법에서의 Pt-Cr 금속 입자의 상호 배치와 CO 수소화반응특성
Mutual Arrangement of Pt-Cr Particles and CO Hydrogenation over Novel Catalyst Preparation Method Using w/o Microemulsion
영남대학교 응용화학공학부, 경산 712-749
School of Chemical Emgineering & Technology, Yeungnam University, Kyongsan 712-749, Korea
HWAHAK KONGHAK, February 2000, 38(1), 7-12(6)
https://doi.org/NONE
https://doi.org/NONE
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Abstract
Microemulsion을 이용한 신규 촉매 제조법에 의해서 제조되어진 Pt 촉매에서의 CO 수소화반응특성에 대한 연구를 수행하였다. ME법 (microemulsion method)으로 제조한 Pt 미립자의 평균 입자경은 종래의 함침법으로 제조한 입자경보다 현저히 작다는 사실을 알 수 있었다. 그로인해서, ME법 촉매는 CO 수소화반응에서 촉매 활성이 함침법 촉매보다 매우 높다는 것을 알 수 있었다. ME법으로 제조한 Pt-Cr/ZrO2계 촉매의 경우는 CO 전환율이 담지순서에 의존하며 Pt를 나중에 합성하여 ziconia 담지체에 고정화시킨 Pt/Cr/ZrO2 촉매에서 가장 높게 나타났다.
The hydrogenation of carbon monoxide was carried out over platinum catalysts prepared by a novel preparation method using water-in-oil microemulsion. The average size of the platinum particles prepared by the mirocemulsion method was much smaller than that prepared by the impregnation method. The catalysts prepared by the microemulsion method were found to exhibit a much higher activity for the hydrogenation of carbon monoxide than the catalysts obtained from impregnation method. In the case of the Pt-Cr/ZrO2 catalysts prepared by the microemulsion method, the CO conversion was dependent on the supporting procedures and became the highest with the Pt/Cr/ZrO2 catalysts prepared by later Pt microparticles immobilization.
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References
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Hanaoka T, Kim WY, Kishida M, Nagata H, Wakabayashi K, Chem. Lett., 645 (1997)
Kishida M, Kim WY, Nagata H, Wakabayashi K, Appl. Surf. Sci., 121, 347 (1997)
Scherrer P, Gohinger Nachrichen, 2, 98 (1918)
Kurihara K, Kizling J, Stenius P, Fendler JH, J. Am. Chem. Soc., 105, 2574 (1983)
Sermon PA, Bond GC, Catal. Rev., 8, 211 (1987)
Robinson BH, Towey TF, Zourab S, Colloids Surf., 61, 175 (1991)
Yang AC, Garland CW, J. Chem. Phys., 61, 1504 (1957)
Rice CA, Worely SD, Curtis CW, Guin JA, Tarrer AR, J. Chem. Phys., 74, 6487 (1981)
