Catalytic dry reforming of methane over ni-substituted hexaaluminates

CO2 re-use as an oxidant at point emission sources represents a potentially viable option to reducing CO2 footprint. CO2-CH4 reforming performance for a series of Ba0.75NiyAl12-yO19- (y = 0.2, 0.4, 0.6, 0.8 and 1.0) catalysts are examined over the temperature range 200 to 900 °C. The catalysts exhibit unique CO2 adsorption characteristics that are directly related to surface bascity and the extent of Ni-substitution. The systematic study of the Ni substitution level on both structural and catalytic effects indicates that the segregation of Ba at the surface produces an effect on surface basicity and carbon deposition. The relationship between catalyst activity and structure is characterized by EXAFS, XRD, XPS and TPR1,2.