Abstract
Abstract The catalytic oxidation of methane over supported nickel catalysts has been studied using conventional catalytic reactor measurements, temperature programmed reaction spectroscopy and gas pulsing experiments. The influence of support material, catalyst pre-treatment and operating temperature have been studied. The nature of the support material has a large influence on the subsequent activity and CO selectivity of the nickel catalysts. Temperature programmed measurements have been used to study methane activation, the surface reaction pathways and to evaluate the nature and level of any carbon species deposited during reaction. Temperature programmed oxidation reveals several types of carbon are formed on the catalyst during catalytic methane oxidation. Gas pulsing experiments have been carried out at different reaction temperatures to determine how the initial methane conversion, product selectivity and surface carbon yield vary as a function of contact time, and show that metallic nickel provides the active site for methane partial oxidation.
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