Resumo

GALLEGO, JAIME et al. PRODUCTION OF CARBON NANOTUBES AND HYDROGEN BY CATALYTIC ETHANOL DECOMPOSITION. Dyna rev.fac.nac.minas [online]. 2013, vol.80, n.178, pp.78-85. ISSN 0012-7353.

This work reports the synthesis of multiwall carbon nanotubes (MWCNTs) by the catalytic decomposition of ethanol using the perovskite-type oxide LaNiO₃ as catalyst precursor. The carbon nanotubes were characterized by transmission electronic microscopy (TEM), scanning electronic microscopy (SEM) and thermogravimetric analysis (TGA). TEM micrographs show that the carbon nanotubes were multi-walled with inner diameters ranging from 3 nm to 12 nm and outer diameters up to 42 nm. The yield of CNT and H₂ were 3.5 g_CNT·(g_cat·h)^-1 and 39 L_H2·(g·h)^-1 respectively at 700 °C. TGA data show that nanotube carbon purity was about 95 % by weight and the oxidation temperature was around 620 °C.

Palavras-chave : Carbon nanotubes; perovskites; nickel; hydrogen; ethanol decomposition.

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