Selective hydrogenation of isoprene over δ-alumina-supported eggshell Pd catalysts: Particle size effects
作者： June-Cheng Chang , Tse-Chuan Chou
DOI: 10.1016/S0926-860X(96)00324-9
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摘要: Abstract The effects of calcination temperature on the metal dispersion δ-alumina-supported eggshell profile Pd catalyst and its catalytic performance in isoprene selective hydrogenation were investigated. CO chemisorption results indicated that particles grew with elevation temperature. Catalytic tests showed conversion increased increasing dispersion, while selectivity to isopentenes decreased. Based programmed desorption (TPD), lower was attributed fewer sites for adsorption. higher isopentenes, however, regarded as a consequence both insufficient active further isopentane electronic interaction between alumina surface. Microscopic photo, electron probe microanalysis (EPMA), TPD, catalysts test coke formed also that, less is formation alumina.
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