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首页> 外文期刊>RSC Advances >Impact of double-solvent impregnation on the Ni dispersion of Ni/SBA-15 catalysts and catalytic performance for the syngas methanation reaction
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Impact of double-solvent impregnation on the Ni dispersion of Ni/SBA-15 catalysts and catalytic performance for the syngas methanation reaction

机译：双层溶剂浸渍对镍氢镍催化剂Ni分散的影响及其合成气甲烷化反应的催化性能

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摘要

Several nickel-based SBA-15 catalysts with Ni content in range of 3 wt% to 10 wt% were prepared by the " double-solvent" impregnation method and investigated for synthetic natural gas (SNG) production in a continuous flow fixed-bed reactor. Using a double-solvent impregnation method could improve the dispersion of nickel particles, which significantly improved the catalytic activity of the Ni-based catalysts in the syngas methanation reaction. The 10% Ni/SBA-15(D) catalyst achieved the best activity with 100% CO conversion and about 99% CH4 yield at 400 degrees C, 0.3 MPa and 15 000 mL g(-1) h(-1). The catalysts were characterized by N-2 adsorption-desorption, X-ray diffraction (XRD), transmission electron microscope (TEM), H-2-temperature-programmed reduction (H-2-TPR), H-2 pulse chemisorption, CO-temperature-programmed desorption (CO-TPD) and thermogravimetric (TG). It could be speculated that using the double-solvent impregnation method strengthened the interactions between NiO and the support based on the TPR results. The results of XRD and TG analysis showed that catalyst sintering rather than carbon deposition led to catalyst deactivation in the heat-resistant performance and 100 h stability test.
机译：通过“双溶剂”浸渍方法制备几种基于镍的SBA-15催化剂，其含量为3wt％至10wt％，并在连续流固定床反应器中研究了合成天然气（SNG）生产。 。使用双溶剂浸渍方法可以改善镍颗粒的分散，从而显着提高了合成气甲烷化反应中的Ni基催化剂的催化活性。 10％Ni / SBA-15（d）催化剂达到了100％CO转化的最佳活性，400℃，0.3MPa和15000mL G（-1）H（-1）的约99％CH 4产率。催化剂的特征在于N-2吸附 - 解吸，X射线衍射（XRD），透射电子显微镜（TEM），H-2温控的减少（H-2-TPR），H-2脉冲化学吸附，CO - 编程 - 编程的解吸（CO-TPD）和热重度（TG）。可以推测使用双溶剂浸渍方法强化基于TPR结果的NIO与支持物之间的相互作用。 XRD和TG分析结果表明，催化剂烧结而不是碳沉积导致耐热性能和100h稳定性试验中的催化剂失活。

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  • 来源
    《RSC Advances》 |2016年第42期|共9页
  • 作者

    Tao Miao; Xin Zhong; Meng Xin; Lv Yuhao; Bian Zhicheng;

  • 作者单位

    E China Univ Sci &

    Technol Shanghai Key Lab Multiphase Mat Chem Engn Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Shanghai Key Lab Multiphase Mat Chem Engn Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Shanghai Key Lab Multiphase Mat Chem Engn Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Shanghai Key Lab Multiphase Mat Chem Engn Shanghai 200237 Peoples R China;

    E China Univ Sci &

    Technol Shanghai Key Lab Multiphase Mat Chem Engn Shanghai 200237 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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