Application of Ni-Al-hydrotalcite-derived catalyst modified with Fe or Mg in CO2 methanation

In this work, Ni-Al-hydrotalcite-derived catalyst modified with Fe or Mg for CO2 methanation was investigated in an attempt to improve the reaction activity at low temperature. Through the characterization of XRD, H-2-TPR, and N-2-BET, 0.05Fe-Ni-Al2O3-HT catalyst can be found with a better reducing property, higher surface area, better Ni dispersion, and smaller pore size. The CO2 conversion using this catalyst was tested in a fixed-bed reactor in laboratory. The result showed better reaction activity at low temperature. At 219 degrees C, the CO2 conversion could reach 80.8 %. Meanwhile, the highest CO2 conversion of 96.0 % was achieved at 350 degrees C.