The objectives of this study were to investigate the influence of ethylene addition on the hydrogenation of CO over Ru/SiO/sub 2/ and to compare the product distribution obtained with those for CO hydrogenation in the absence of ethylene and ethylene homologation in the absence of CO. To enable identification of the source of carbon in the products, /sup 13/C-labeled CO and unlabeled C/sub 2/H/sub 4/ were used. Products were analyzed by isotope-ratio gas chromatography-mass spectrometry. Among the issues investigated were the influence of ethylene addition on the reactions of CO and the participation of ethylene in processes of hydrocarbon chain initiation and growth. The influence of ethylene addition on methane formation was also examined.
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