Higher Alcohols Synthesis from CO2 Hydrogenation over K2O-Modified CuZnFeZrO2 Catalysts

The CuZnFeZrO2 catalysts were synthesized by co-precipitation method.,and then used to synthesize different content of K2O modified CuZnFeZrO2 catalysts by deposition-precipitation method.Hydrogenation of CO2 to higher alcohols over (K2O)x/CuZnFeZrO2 catalysts were investigated at 523 K,3.0 MPa and 3000 h-1.These catalysts were characterized by X-ray diffraction (XRD),temperature programmed reduction of H2 (H2-TPR),and temperature-programmed desorption of CO2 (CO2-TPD).The results showed the addition of an appropriate amount of Potassium to the CuZnZrO2 catalysts improved catalytic activity ,the space time yield (STY) and C2+OH selectivity. When the Fe content is 5% best, at this time the space time yield of selectivity and alcohol of C2+ alcohol reaches the maximum value, this time space and time conversion rate is 0.32g/ml·h.