Ni/La2O3-SiO2catalysts applied to glycerol steam reforming reaction: effect of the preparation method and reaction temperature

Journal of the Brazilian Chemical Society

Vivian V. Thyssen¹  Elisabete M. Assaf¹ 

关键词: nickel;    catalysts;    preparation method;    steam reforming;    glycerol;   

DOI  :  10.5935/0103-5053.20140273

来源: SciELO

【 摘 要 】

Ni/La2O3-SiO2 catalysts were obtained by different methods of preparation: sequential impregnation, simultaneous impregnation (I-sim), precipitation of support followed by Ni impregnation and co-precipitation. The samples were characterized by energy-dispersive X-ray spectroscopy, nitrogen physisorption, X-ray diffraction (XRD), infrared spectroscopy, temperature programmed reduction (TPR), H2 chemisorption, scanning electron microscopy and thermogravimetric analysis. XRD and TPR results indicated two Ni species in the samples: NiO (I-sim) and La2NiO4 (other samples). Catalytic tests were performed in glycerol steam reforming at 600 ºC. The best result was observed with I-sim catalyst, which presented the higher reduction degree, metallic dispersion and metallic area (TPR and TPD). This catalyst was also tested at 500 ºC and 700 ºC and performed best at 600 ºC.

【 授权许可】

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