Effect of boron addition on the MoO3/CeO2-Al2O3 catalyst in the sulfur-resistant methanation

doi:10.1016/j.cjche.2017.08.011

Abstract

Abstract: The effect of boron on the performance of MoO₃/CeO₂-Al₂O₃ catalysts, which were prepared with impregnation method, was investigated. The catalysts were characterized with N₂ adsorption-desorption, XRD, H₂-TPR, and NH₃-TPD, and were tested in sulfur-resistant methanation. The results indicated that the MoO₃/CeO₂-Al₂O₃ catalysts modified by boron showed higher catalytic performance in sulfur-resistant methanation. The CO conversion increased from 47% to 62% with 0.5 wt% boron content. When the content of boron was under 0.5 wt%, the results suggested there was an increase in the amorphous form of MoO₃ caused by the generation of weak and intermediate acid sites, which had weakened the interaction between the active components and supports. While, the catalyst added 2.0 wt% boron showed the strong acid sites and the largest crystalline size resulting in the uneven distribution of ceria.

Key words: Boron, Sulfur-resistant, Methanation, Mo-based catalyst, Composite support

摘要： The effect of boron on the performance of MoO₃/CeO₂-Al₂O₃ catalysts, which were prepared with impregnation method, was investigated. The catalysts were characterized with N₂ adsorption-desorption, XRD, H₂-TPR, and NH₃-TPD, and were tested in sulfur-resistant methanation. The results indicated that the MoO₃/CeO₂-Al₂O₃ catalysts modified by boron showed higher catalytic performance in sulfur-resistant methanation. The CO conversion increased from 47% to 62% with 0.5 wt% boron content. When the content of boron was under 0.5 wt%, the results suggested there was an increase in the amorphous form of MoO₃ caused by the generation of weak and intermediate acid sites, which had weakened the interaction between the active components and supports. While, the catalyst added 2.0 wt% boron showed the strong acid sites and the largest crystalline size resulting in the uneven distribution of ceria.

关键词: Boron, Sulfur-resistant, Methanation, Mo-based catalyst, Composite support

Baowei Wang, Wenxia Yu, Weihan Wang, Zhenhua Li, Yan Xu, Xinbin M. Effect of boron addition on the MoO₃/CeO₂-Al₂O₃ catalyst in the sulfur-resistant methanation[J]. Chin.J.Chem.Eng., 2018, 26(3): 509-513.

Baowei Wang, Wenxia Yu, Weihan Wang, Zhenhua Li, Yan Xu, Xinbin M. Effect of boron addition on the MoO₃/CeO₂-Al₂O₃ catalyst in the sulfur-resistant methanation[J]. Chinese Journal of Chemical Engineering, 2018, 26(3): 509-513.

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Effect of boron addition on the MoO₃/CeO₂-Al₂O₃ catalyst in the sulfur-resistant methanation

Effect of boron addition on the MoO₃/CeO₂-Al₂O₃ catalyst in the sulfur-resistant methanation

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