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CO 2 reforming of methane was studied at medium temperature (700 °C) using a GSHV of 48,000 h -1 over nickel catalysts supported on ZrO 2 promoted by alumina. The catalysts were prepared by a one-step synthesis method and characterized by BET, H 2 -TPR, XRD, XPS, TEM, Raman spectroscopy, and TGA. The NiO-10Al 2 O 3 -ZrO 2 catalyst exhibited higher catalytic performance in comparison with the NiO-ZrO 2 catalyst. The enhancement of catalytic activity in dry reforming could be associated with the alterations in surface properties due to Al promotion. First, the Al promoter could modify the structure of ZrO 2 , leading to an increase of its pore volume and pore diameter. Second, the NiO-10Al 2 O 3 -ZrO 2 catalyst exhibited high resistance to sintering. Third, the NiO-10Al 2 O 3 -ZrO 2 catalyst showed high suppression to the loss of nickel during a long-term catalytic test. Finally, the addition of Al could inhibit the reduction of ZrO 2 during the reduction and reaction, endowing further the stability.

Syngas Production via CO2 Reforming of Methane over Aluminum-Promoted NiO–10Al2O3–ZrO2 Catalyst

Syngas Production via CO₂ Reforming of Methane over Aluminum-Promoted NiO–10Al₂O₃–ZrO₂ Catalyst