INFRARED STUDY OF THE HYDROGENATION AND DEHYDROGENATION OF CHEMISORBED OLEFINS AND ACETYLENE
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Publisher:Ohio State University
“Various unsaturated hydrocarbons were chemisorbed on Cabosil-supported nickel and then exposed to hydrogen to form adsorbed alkyl groups. Infrared spectra show that these chemisorbed alkyl groups can be dehydrogenated by evacuation to form a surface carbide type chemisorbed species. By reexposure to hydrogen at room temperature, the surface carbide is easily rehydrogenated to form adsorbed alkyl groups. The spectra show that some polymerization can occur during this procedure. This is especially interesting in the case of acetylene which on chemisorption forms both adsorbed ethyl groups and an appreciable quantity of surface carbide. Subsequent hydrogen exposure results in an infrared spectrum indicating mainly adsorbed butyl groups, consistent with the fact that hydrogenation of acetylene produces a product containing a high percentage of butane.”
Author Institution: Texaco Research Center, Beacon
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