Citas bibligráficas
Unsihuay, D., (2017). Síntesis y catalizadores basados en óxidos de niquel dopado con titanio para la producción de etileno a partir de la deshidrogenación oxidativa (ODH) del etano [Tesis, Universidad Nacional de Ingeniería]. http://hdl.handle.net/20.500.14076/8254
Unsihuay, D., Síntesis y catalizadores basados en óxidos de niquel dopado con titanio para la producción de etileno a partir de la deshidrogenación oxidativa (ODH) del etano [Tesis]. : Universidad Nacional de Ingeniería; 2017. http://hdl.handle.net/20.500.14076/8254
@misc{renati/261053,
title = "Síntesis y catalizadores basados en óxidos de niquel dopado con titanio para la producción de etileno a partir de la deshidrogenación oxidativa (ODH) del etano",
author = "Unsihuay Vila, Daisy Melina",
publisher = "Universidad Nacional de Ingeniería",
year = "2017"
}
Catalysts based on titanium doped nickel oxides Ni1-αTiαO with α from 0.01 to 0.05, were prepared by a controlled evaporation method at 550 °C for selective oxidative dehydrogenation (ODH) of ethane to ethylene. The introduction of small amounts of Ti into the NiO lattice had noticeable effects on the nickel simple oxide properties, increasing the BET surface. In addition, it was observed a sustained depletion of crystallite size following XRD analysis, a generation of new acid sites, evaluated by NH3-TPD, a redistribution of reducible species to lower and higher temperatures studied from H2-TPR profile and a depression of non-stoichiometric oxygen with the increasing composition of titanium detected by O2-TPD. The catalytic tests were carried out under steady state conditions at a constant W/F of 0.48 g.s/mL in order to evaluate the conversion and modifying W/F from 0.24 to 0.48 g.s/mL, to quantify the selectivity to ethylene. In all the Ni1-αTiαO catalysts, the catalytic tests revealed a positive doping effect of Ti in the performance of the samples, improving the ethane conversion and selectivity levels to ethylene, in comparison to the pure NiO. The sample Ni0.95Ti0.05O achieved the best selectivity to ethylene (77%) at a moderated ethane conversion of 35%, probably due to the increasing of the framework nucleophilic oxygen species, responsible of the selective oxidation. Keywords: ODH, ethane, Ti-doped NiO, ethylene selectivity.
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