Ni-based catalysts obtained from perovskites oxides for ethanol steam reforming

AGÜERO, FABIOLA NERINA; ALONSO, JOSE ANTONIO; FERNÁNDEZ-DÍAZ, MARIA TERESA; CADUS, LUIS EDUARDO

Journal of Fuel Chemistry and Technology

Elsevier

Año: 2018 vol. 46 p. 1332 - 1341

1872-5813

Perovskites as host structures of cations were used in order to generate in situ active and stable catalysts for ethanol steam reforming. For this purpose, La1-xMgxAl1-yNiyO3 (x = 0.1; y= 0, 0.1, 0.2, 0.3) perovskites were synthetized by the citrate method. Ni segregation is evident for a substitution level higher than 0.2. The segregation of Ni as NiO generated species interacts with different metal-support after the reduction step. The y= 0.1 catalyst presents the highest H2 yield value about 85% during reaction time, with low mean values of CH4 and CO selectivities of 3.4% and 11%, respectively and a low carbon formation. The better performance of y= 0.1 catalyst could be attributed to the minor proportion of segregated phases, thus a controlled expulsion of Ni is successfully reached.