Abstract
In order to determine the conditions of decreasing activity and ageing of a low-temperature catalyst for carbon monoxide conversion in the course of operation in an industrial reactor, changes in the state of the catalyst surface were followed. The catalyst samples were taken from an industrial reactor by a special procedure at different intervals during its operating life of 23 months and then investigated under laboratory conditions. It was determined by X-ray diffraction analysis, X-ray photoelectron spectroscopy, as well as by investigating the activity, that the decrease in activity and catalyst ageing arises due to the growth of active component particles and to poisoning of the catalyst surface by chlorine.
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