EFFECTS OF SUPPORTS ON THE ACTIVITY OF NICKEL-CATALYST FOR CH4 REFORMING WITH CO2

Nickel catalyst is an effective catalyst for reforming CH4 with CO2. T he reaction between CO2 and CH4 at 1073K in the pressure of 0.1MPa has been studied over different materials supported nickel metal in a fix ed-bed reactor. Different catalysts before and after reaction were cha racterized by SEM, XRD, XPS. Results shows that CO and H-2 are basical ly produced at the same ratio. When the feed ratio CO2/CH4 is less tha n 0.5, less C-2 similar to C-4 hydrocarbons are detected. When the fee d ratio CO2/CH4 is 1, Ni/alpha-Al2O3 catalyst has the highest activity . However, when the feed ratio CO2/CH4 is greater than 1, Ni/gamma-Al2 O3, Ni/alpha-Al2O3, Ni/SiO2 and Ni/HZSM-5 had higher activity; Ni/clin optilolite basically no activity. Different kinds of carbon deposit ar e established.