不同载体负载的Mo基甲烷化催化剂

研究γ-Al₂O₃、CeO₂和ZrO₂负载的Mo基催化剂性质及其甲烷化性能。采用N2物理吸附、H₂程序升温还原、X射线衍射和透射电镜对催化剂进行表征，使用固定床，在550 ℃、3 MPa、5 000 h^-1、V(H₂)∶V（CO）=1.0且含有H2S的合成气中对催化剂甲烷化性能进行测试。结果表明，3种载体中，Mo在ZrO₂载体上分散度最高，甲烷化反应中Mo/ZrO₂催化剂活性最高； CeO₂负载的Mo相抗烧结能力最强，甲烷化反应中Mo/CeO₂催化剂稳定性最好。

Supported Mo-based catalysts with different carriers for methanation

The properties of Mo-based catalysts supported on γ-A1203, CeO2 and ZrO2 and their methanation performance were studied. The catalysts were characterized by N2 physical adsorption, H2 temperature- programmed reduction, X-ray diffraction and transmission electron microscopy. The performance of the catalyst for methanation was tested in a fixed bed reactor under the condition of 550 ℃ ,3 MPa,5 000 h-1, V（ H2 ）：V（CO） = 1.0 and syngas containing H2S. The results indicated that the dispersion of Mo phase supported on ZrO2 was the highest among three supports and Mo/ZrO2 catalyst possessed the highest activity during the methanation reaction. Furthermore, the sinitering resistant ability of Mo phase supported on CeO2 was the best, and Mo/CeO2 catalyst exhibited the highest methanation stability.