Microstructural study of Ni/gamma-Al2O3 catalyst: addition effects of CeO2 on carbon dioxide reforming of methane

Química Nova

Universidade Federal do Paraná, Curitiba¹  Schreiner, Wido H.¹  Valentini, Antoninho¹  Universidade Federal de São Carlos, São Carlos¹  Longo, Elson¹  Probst, Luiz Fernando Dias¹  Leite, Edson R.¹  Lisboa-Filho, Paulo N.¹  Pontes, Fenelon M.¹  Carreño, Neftalí L. V.¹  Universidade Federal de Santa Catarina, Florianópolis¹ 

关键词: methane;    syngas;    Ni/g-Al2O3.;   

DOI  :  10.1590/S0100-40422003000500005

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The carbon dioxide reforming of methane was carried out over nickel catalysts supported on the g-Al2O3/CeO2 system prepared by wet impregnation. With the increase of the CeO2 weight in the catalyst, a higher stability was observed in the catalytic activity, together with an excellent resistance to carbon deposition and a better Ni dispersion. The catalysts were characterized by means of surface area measurements, TPR, H2 chemisorption, XRD, SEM, EDX, XPS and TEM. An interaction between Ni and CeO2 was observed to the Ni/CeO2 sample after activation in a H2 atmosphere above 300 ºC. Such behavior has a significantly influence on the catalytic activity.

【 授权许可】

Unknown