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Citation: Chen Ji-Xiang, Qiu Ye-Jun, Zhang Ji-Yan, Su Wan-Hua. Influence of La₂O₃ and CeO₂ Promoters on Physico-chemical Properties and Catalytic Performance of Ni/M Catalyst in Methane Reforming with Carbon Dioxide[J]. Acta Physico-Chimica Sinica, ;2004, 20(01): 76-80. doi: 10.3866/PKU.WHXB20040116 shu

Influence of La₂O₃ and CeO₂ Promoters on Physico-chemical Properties and Catalytic Performance of Ni/M Catalyst in Methane Reforming with Carbon Dioxide

1.
Department of Catalysis Science and Engineering, School of Chemical Engineering and Technology, Tianjin University; State Key Laboratory of C1 Chemistry and Chemical Technology; National Engine Combustion Laboratory, Tianjin University, Tianjin　300072

Received Date: 28 May 2003
Available Online: 15 January 2004

Three catalysts, NiO-M , NiO-La2O3-M and NiO-CeO2-M containing 10％(w) Ni were prepared by the co-precipitation method. The effects of La2O3 and CeO2 on physico-chemical properties and catalytic performance of NiO-M catalysts were studied by means of BET, XRD, TPR, XPS, TG and reaction activity evaluation. It was found that NiO formed a nickel-magnesia solid solution with M , and La2O3 and CeO2 promoters improved the resistance to sintering of the nickel-magnesia solid solution, which was attributed to the higher specific surface area and smaller size of crystallites of the Nickel-magnesia solid solution. Besides, La2O3 and CeO2 could promote reduction of nickel species in nickel-magnesia solid solution, especially CeO2. Under reaction conditions of CH4/CO2=1(molar ratio), 0.1 MPa, 1023 K and 1073 K, 18 L•g-1•h-1, NiO-La2O3-M and NiO-CeO2-M showed higher activity than NiO-M . However, the three catalysts had similar activity at 1123 K because the reaction was close to the thermodynamic equilibrium under these reaction conditions. La2O3 and CeO2 act as a structural promoter and an electronic promoter respectively to improve the properties of NiO-M .
- Methane reforming with carbon dioxide;Nickel-magnesian solid solution; Cerium oxide;Lanthanum oxide;Sintering;Carbon deposition
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沈阳化工大学材料科学与工程学院沈阳 110142

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Influence of La2O3 and CeO2 Promoters on Physico-chemical Properties and Catalytic Performance of Ni/M Catalyst in Methane Reforming with Carbon Dioxide

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通讯作者: 陈斌, bchen63@163.com

Influence of La₂O₃ and CeO₂ Promoters on Physico-chemical Properties and Catalytic Performance of Ni/M Catalyst in Methane Reforming with Carbon Dioxide