Effect of composite supports on the methanation activity of Co-Mo-based sulphur-resistant catalysts

Journal of Natural Gas Chemistry Pub Date : 2012-11-01 DOI:10.1016/S1003-9953(11)60430-1

Haiyang Wang , Zhenhua Li , Erdong Wang , Can Lin , Yuguang Shang , Guozhong Ding , Xinbin Ma , Shaodong Qin , Qi Sun

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引用次数: 19

Abstract

The effects of composite supports of CeO₂-Al₂O₃, MgO-Al₂O₃, TiO₂-Al₂O₃ or ZrO₂-Al₂O₃ on the methanation activity of supported Co-Mo-based sulphur-resistant catalysts were investigated. The catalysts were further characterized by nitrogen adsorption measurement, X-ray diffraction and X-ray photoelectron spectroscopy. The catalyst of 5%CoO-15%MoO₃ supported on CeO₂-Al₂O₃, MgO-Al₂O₃, TiO₂-Al₂O₃ or ZrO₂-Al₂O₃ composite oxides, respectively, showed different catalytic performances of syngas methanation in the presence of hydrogen sulphide as compared with that of the 5%CoO-15%MoO₃/Al₂O₃ catalyst. The Co-Mo/CeO₂-Al₂O₃ catalyst shows the highest methanation activity among the tested catalysts. The enhanced methanation activity may be attributed to the improvement of the dispersion of active metal species and the inhibition of the formation of S⁶⁺.

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复合载体对co - mo基耐硫催化剂甲烷化活性的影响

研究了CeO2-Al2O3、MgO-Al2O3、TiO2-Al2O3或ZrO2-Al2O3复合载体对负载型co - mo基耐硫催化剂甲烷化活性的影响。通过氮吸附、x射线衍射和x射线光电子能谱对催化剂进行了进一步表征。分别负载在CeO2-Al2O3、MgO-Al2O3、TiO2-Al2O3或ZrO2-Al2O3复合氧化物上的5%CoO-15%MoO3催化剂在硫化氢存在下的合成气甲烷化催化性能与5%CoO-15%MoO3/Al2O3催化剂不同。Co-Mo/CeO2-Al2O3催化剂的甲烷化活性最高。甲烷化活性的增强可能是由于改善了活性金属的分散和抑制了S6+的形成。

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Journal of Natural Gas Chemistry 化学-工程：化工

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2 months