STABILITY IMPROVEMENT OF NI/MGO CATALYST FOR CO2 REFOMING OF METHANE

The influence of potassium addition on the catalytic activity and stability of Ni/MgO catalyst in CO2 reforming of methane has been studied. To determine the catalytic activity, catalytic test were carried out at different temperature (650,750 and 850C). The presence of potassium facilitates the reduction of nickel during the activation process (heat treatment in H2 at 550 C for 4 h). K+ addition enhances the catalyst stability by decreasing sintering process and coke formation on the catalyst surface. The stability test of Ni/MgO and K-Ni/MgO catalysts showed the K-Ni/MgO catalyst remain active and stable, because for the K-Ni/MgO catalyst the formation of coke is much lower.

کلیدواژه ها:

CO2 reforming of methane ، Ni ، MgO catalyst ، K+ addition ، stability improvement