ISOKINETIC EFFECTS IN ETHANE HYDROGENOLYSIS AND THEIR RELATION TO THE MECHANISM OF THE REACTION

被引:17
作者
LARSSON, R
机构
[1] Group of Catalysis Research, Inorganic Chemistry 1, Chemical Center, University of Lund, Lund
关键词
ETHANE HYDROGENOLYSIS; MECHANISM; ACTIVATION ENERGIES; ISOKINETIC EFFECTS; PLATINUM; IRIDIUM; IRON AND COBALT;
D O I
10.1007/BF00764079
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Literature data on the kinetics of ethane hydrogenolysis over metal catalysts are used to indicate the existence of isokinetic temperatures, THETA. For platinum THETA = 725 K, for Ni THETA is probably in the same temperature range. For Fe and Co on the other hand THETA is found at much lower values, about 330 K for Fe and 320 K for Co. From an analysis of the model of selective energy transfer, these values support the proposition of Sinfelt that the elements of high atomic number in one and the same transition metal series favour the splitting of the carbon-carbon bond as rate determining step, whereas those elements that have lower atomic numbers cause the splitting of the metal-carbon bond to be the rate determining step.
引用
收藏
页码:137 / 148
页数:12
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