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本文以程序升温还原(TPR)和脱附(TPD)为主要手段,研究了Pt/Al_2O_3体系在焙烧-还原-再氧化各过程中的金属-担体相互作用,并进而考察了不同温度还原后催化剂的氢吸附性能,以及还原温度、金属含量和添加第二金属组元对其正庚烷转化选择性的影响。 TPR结果表明,Pt/Al_2O_3上的金属担体间络合物在干燥阶段已经生成。随焙烧温度提高,主要
In this paper, temperature-programmed reduction (TPR) and desorption (TPD) as the main means to study the metal-support interaction of Pt / Al_2O_3 system in the process of roasting-reduction-reoxidation, and then investigated the effect of different temperature reduction catalyst Hydrogen adsorption performance, as well as the reduction temperature, the metal content and the addition of the second metal component on its n-heptane conversion selectivity. TPR results show that the intermetallic intermetallic complexes on Pt / Al 2 O 3 have been formed in the drying stage. With the roasting temperature increases, the main