The macro-kinetics of methane-steam catalytic reforming reaction with wheel catalysts of original sizes was investigated in an internal recycling gradientless reactor (Type KD-1) under 3.04×106 Pa absolute pressure. Experimental conditions employed were as follows: reaction temperature 600-800℃

H2O/CH4 = 2.0-5.0 (molar ratio)

carbon space velocities 4320-12120 ml/h. g. The methane-steam reforming reactions were described by parallel reaction models and experimental data were regressively computerized. The following macro-kinetics equations were obtained: and Calculations from experimental data indicated that water gas shift reaction is far away from equilibrium; wheel catalyst are about two times as effective as that of normal ring catalysts. Macro-kinetics equations thus obtained were applied on a commercial reformer; claiming reliability for the equations and good equivalence.