The macrokinetics of CO gas coupling reaction on Pd catalyst was studied in a fixed-bed reactor.The size of the catalyst was φ 1.5 mm×(2—3) mm.The experiments were carried out on Pd catalyst at the optimum CO coupling reaction conditions of temperature 110—130℃

space velocity 0.146—0.292 mol8226;g-18226;h-1

EN mole concentration 5%—15% and CO mole concentration 20%—35%.The Runge-Kutta and simplx methods were used to determine the parameters of kinetics models.The statistic test and residual error distribution were made to prove the validity of the kinetics models.The calculated results by the model were in agreement with the experimental data.The macrokinetics could provide theoretical foundation and guidance for simulation and scale-up of the reactor.