SOME UNUSUAL OBSERVATIONS CONCERNING THE ADSORPTION OF THIOPHENE ON COPPER CHROMITE

Adsorption of thiophene, a poison, on copper chromite catalyst has been studied at conditions close to those used in the reduction of nitrobenzene to aniline (i.e., at temperatures of 150 ° to 300 °C and in the presence of excess hydrogen) by using pulse gas Chromatographic technique. Both irreversible and reversible adsorption on a surface partially saturated with irreversibly adsorbed thiophene showed unusual behaviour: the rate of irreversible adsorption and the extent of reversible adsorption increased with initial surface coverage due to irreversible adsorption. © 1979.