KINETICS OF HYDROGENATION OF CARBON DIOXIDE OVER COPPER AND NICKEL CATALYSTS ON CARBONACEOUS SUPPORTS

摘要

The authors have studied the reaction of interaction of CO_2 and H_2 on supported copper and nickel catalysts. It is shown that on a copper catalyst CO and H_2O are formed. On a nickel catalyst, apart from these products, there is also formed CH_4. As the degree of conversion increases the selectivity decreases for CO and increases for CH_4. A consecutive scheme has been established for the formation of CH_4 on a nickel catalyst. Kinetic equations were deduced for the formation of reaction products and the stepwise scheme of the process is proposed.