Syngas production by CO2 reforming of coke oven gas over Ni/La2O3–ZrO2 catalysts

• A series of Ni/La2O3–ZrO2 catalysts were synthesized by sol–gel method.
• The catalysts prepared in this work have excellent resistance to carbon deposition.
• Effects of Ni content on the performances of the catalysts were studied in detail.
• The reducibility of the Ni/La2O3–ZrO2 catalysts was investigated by H2-TPR.
• The highest CH4 conversion of 95.2% and H2 selectivity of 94.3% were achieved in this work.

Syngas production by CO2 reforming of coke oven gas (COG) was studied in a fixed-bed reactor over Ni/La2O3–ZrO2 catalysts. The catalysts were prepared by sol–gel technique and tested by XRF, BET, XRD, H2-TPR, TEM and TG–DSC. The influence of nickel loadings and calcination temperature of the catalysts on reforming reaction was measured. The characterization results revealed that all of the catalysts present excellent resistance to coking. The catalyst with appropriate nickel content and calcination temperature has better dispersion of active metal and higher conversion. It is found that the Ni/La2O3–ZrO2 catalyst with 10 wt% nickel loading provides the best catalytic activity with the conversions of CH4 and CO2 both more than 95% at 800 °C under the atmospheric pressure. The Ni/La2O3–ZrO2 catalysts show excellent catalytic performance and anti-carbon property, which will be of great prospects for catalytic CO2 reforming of COG in the future.

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