Design and parallel synthesis of novel selective hydrogen oxidation catalysts and their application in alkane dehydrogenation

摘要

A library of 19 supported metal oxides of group IIIA,IVA,and VA metals is prepared using a simple gram-scale reactor for parallel pore impregnation.The activity,stability,and selectivity of these potential hydrogen combustion catlaysts in the dehydrogenation of ethane to ethylene at 600degC is eaminedover severalredox cycles using gas mixtures that simulae real process conditions.Lead,indium,and thallium oxides are highly selective (>99.9%) to hydrogen combustion.Low-loading catalysts are found to exhibit higher oxygen exchange activity.Differences between co-fed and redox oxidative dehydrogenation are discussed.