Intrinsic Kinetics of Methane-Steam Reforming on Catalyst Coating

Cold-spray technology was used to prepare catalyst coating on a stainless steel plate,and the analysis on intrinsic kinetics of methane-steam reforming on coating catalyst Ni/r-Al2O3 was performed.The experiment of methane-steam reforming in a plate micro-channel reactor was conducted at the temperature from 859.7 K to 1 018.7 K when the effect of internal and external diffusion on reaction was eliminated.From the experimental data,the parameters for the double rate kinetics model were determined by using least squares method to conduct linear regression.The pre-exponential factor and the apparent activation energy of carbon monoxide formation was 1.08×108 mol/(h·g·kPa0.89) and 178.98 kJ/mol,respectively,and the pre-exponential factor and the apparent activation energy of carbon dioxide formation was 1.73×104 mol/(h·g·kPa2.06) and 139.00 kJ/mol.The F statistic results show that the correlation index of the intrinsic kinetics model was greater than 0.9 and the F was 10 times greater than the critical one with the confidence domain of 99%.