THE MACROKINETICS OF WATER-GAS SHIFT REACTION ON B113-2 SHIFT CATALYST

Experiments are made on water-gas shift reaction on the industrial ferrochrome shift catalyst B113-2,produced in an internal-circulation gradientless reactor working at a pressure below 3.0 MPa.Different dependencies of the macrokinetics are evaluated by use of a power function kinetic model,and an excellent representation of the kinetic data is given.It is found that the inter-grain diffusion has remarkable impact on the macrokinetics.The influence of CO_2 on the reaction is less significant than that of other traditional ferrochrome shift catalysts,which,very possibly,results from the diffusion or the behavior of Cu in this catalyst.As CO_2,to a certain extent,inhibits the shift reaction rate,some way must be found to reduce the adverse effect of CO_2in order to increase the shift reaction rate.The influence of H_2on the reaction rate is negligible.The increase of the reaction pressure favors the reaction rate and the latter rises linearly with the former below 3.0 MPa.