Preparation of some rare earth oxide supported rhodium catalysts: Study of the supports

摘要: Abstract The present work deals with the preparation of some lanthana, samaria and ytterbia supported rhodium catalysts. three oxides used as starting supports are actually hydrated carbonated in bulk; intensity processes, even nature resulting phases quite different from each other. It has been found that impregnation process induces further carbonation to such an extent phase becomes major component support. No similar effects could be detected on ytterbia. From study reduction step, experimental conditions which allow true rare earth oxide catalysts have devised. In order achieve this, temperatures ranging 723 K (La 2 O 3 ) 623 (Yb were necessary. case lanthana use lower also studied. can concluded behaviour support lanthanide oxides, particularly is more complex than had presumed earlier.