Research institute of Petroleum Industry (RIPI) Journal of Petroleum Research 2345-2900 25 85-1 2016 01 21 Synthesis and Characterization of Ni-Cu/Al2O3-ZrO2 Nanocatalyst via Sequential Impregnation and Sol-Gel Methods Used in CH4/CO2 Conversion to Syngas Synthesis and Characterization of Ni-Cu/Al2O3-ZrO2 Nanocatalyst via Sequential Impregnation and Sol-Gel Methods Used in CH4/CO2 Conversion to Syngas 142 157 586 10.22078/pr.2016.586 FA Mahdi Sharifi Chemical Engineering Faculty, Sahand University of Technology, Tabriz, Iran Mohammad Haghighi Reactor and Catalysis Research Center (RCRC), Sahand University of Technology, Tabriz, Iran Ali Alizadeh Eslami Chemical Engineering Faculty, Sahand University of Technology, Tabriz, Iran Farhad Rahmani Chemical Engineering Faculty, Sahand University of Technology, Tabriz, Iran Nader Rahemi Chemical Engineering Faculty, Sahand University of Technology, Tabriz, Iran Journal Article 2016 05 03 In this study, the effect of sol-gel method on the physicochemical properties of Ni-Cu/Al₂O₃-ZrO₂ nanocatalyst was evaluated in comparison to sequential impregnation method. The nanocatalysts characterization was assessed by XRD, FESEM, PSD, EDS, FTIR, and TG-DTG analysis. The characterization results showed that a more uniform particle size distribution is obtained by the sol-gel method compared to the impregnation one. However, the surface area of this catalyst reduced due to the reduction of porous media and high particles density. Moreover, the sol-gel synthesis method led to the formation of very closely amorphous phases and the enhanced alkaline properties as a result of more –OH stretching vibration. Reforming of methane with CO₂ was performed over Ni-Cu/Al₂O₃-ZrO₂ at atmospheric pressure. The catalysts performance is inquired as a function of reaction temperature (550- 850 °C) and the results are reported in terms of feed conversion and syngas ratio. In the studied temperature range, it was found that the sol-gel synthesized catalyst showed a high activity. The best results were gained at 850 °C. Syngas ratio at this temperature was 0.94, which was very close to the stoichiometry ratio. <br />  In this study, the effect of sol-gel method on the physicochemical properties of Ni-Cu/Al₂O₃-ZrO₂ nanocatalyst was evaluated in comparison to sequential impregnation method. The nanocatalysts characterization was assessed by XRD, FESEM, PSD, EDS, FTIR, and TG-DTG analysis. The characterization results showed that a more uniform particle size distribution is obtained by the sol-gel method compared to the impregnation one. However, the surface area of this catalyst reduced due to the reduction of porous media and high particles density. Moreover, the sol-gel synthesis method led to the formation of very closely amorphous phases and the enhanced alkaline properties as a result of more –OH stretching vibration. Reforming of methane with CO₂ was performed over Ni-Cu/Al₂O₃-ZrO₂ at atmospheric pressure. The catalysts performance is inquired as a function of reaction temperature (550- 850 °C) and the results are reported in terms of feed conversion and syngas ratio. In the studied temperature range, it was found that the sol-gel synthesized catalyst showed a high activity. The best results were gained at 850 °C. Syngas ratio at this temperature was 0.94, which was very close to the stoichiometry ratio. <br />  https://pr.ripi.ir/article_586_605ff764c617d3cd28dbbdd72be8f9a2.pdf