Abstract
The aim of the present work was to study the possibilities provided by XRS in the study of catalytic processes for the case of the hydrogenation ofhex-l-ene on palladium-containing zeolites in the presence of thiophene. This catalytic system was chosen for a number of reas'ons. Firstly, the study of this system is of interest because the reaction with sulfurcontaining compounds is considered to be one of the principal causes of the poisoning of petroleum-processing catalysts. Secondly, from available data on the x-ray spectra of organic molecules and their complexes with metals, it was expected that XRS might be most effectively used to study processes involving sulfur-containing compounds. It may be noted that the hydrogenation of n-hexene in the presence of thiophene has previously been used many times as a model process in the study of the mechanism of the poisoning of zeolite catalysts by sulfur, and has been characterized chemically in considerable detail [9]. In addition to XRS, we also used radiospectroscopic and diffuse reflectance methods.
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