Natural gas reforming of carbon dioxide for syngas over Ni–Ce–Al catalysts

Abstract A series of Ni–Ce–Al composite oxides with various Ni molar contents were synthesized via the refluxed co-precipitation method and used for natural gas reforming of CO 2 (NGRC) for syngas production. The effect of Ni molar content, reaction temperature, feed gas ratio and gas hourly space velocity (GHSV) on the Ni–Ce–Al catalytic performance was investigated. The Ni 10 CeAl catalyst was selected to undergo 30 h stability test and the conversion of CH 4 and CO 2 decreased by 2.8% and 2.6%, respectively. The characterization of the reduced and used Ni 10 CeAl catalyst was performed using BET, H 2 -TPR, in-situ XRD, TEM, and TGA-DTG techniques. The in-situ XRD results revealed that Ce 2 O 3 , CeO 2 and CeAlO 3 coexisted in the Ni 10 CeAl catalyst after reduction at 850 °C for 2 h. The results of the TEM analysis revealed that the Ni particle size increased after the NGRC reaction, which mainly caused the catalyst deactivation.