Hydrogenation of C2H2:C2H4 mixtures using a double labelling method has been studied. Both in the presence and absence of ethylene the rate of acetylene hydrogenation on its partial pressure proceeds through a maximum and the rate is higher when ethylene is added. Using14C-C2H2 it was demonstrated that at low acetylene partial pressures the main route of acetylene hydrogenation was the formation of ethane and C4 hydrocarbons. Using14C-C2H4 it was also shown that at certain acetylene partial pressures the formation of ethane from ethylene completely ceased. Different surface species are suggested and a reaction mechanism is proposed.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry