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Currently at Universidad Pública de Navarra,
PUBLICATIONS
2009
Bimbela, Fernando; Oliva, Miriam; Ruiz, Joaquín; García, Lucía; Arauzo, Jesús
Catalytic steam reforming of model compounds of biomass pyrolysis liquids in fixed bed: Acetol and n-butanol Journal Article
In: Journal of Analytical and Applied Pyrolysis, vol. 85, no. 1-2, pp. 204–213, 2009, ISSN: 01652370.
@article{Bimbela2009,
title = {Catalytic steam reforming of model compounds of biomass pyrolysis liquids in fixed bed: Acetol and n-butanol},
author = {Fernando Bimbela and Miriam Oliva and Joaquín Ruiz and Lucía García and Jesús Arauzo},
doi = {10.1016/j.jaap.2008.11.033},
issn = {01652370},
year = {2009},
date = {2009-05-01},
journal = {Journal of Analytical and Applied Pyrolysis},
volume = {85},
number = {1-2},
pages = {204--213},
publisher = {Elsevier},
abstract = {Acetol (hydroxyacetone) and 1-butanol, model compounds of the aqueous fraction of biomass pyrolysis liquids (bio-oil), have been catalytically steam reformed in a microscale fixed-bed facility. Three Ni coprecipitated catalysts, with varying nickel content (23, 28 and 33% expressed as a Ni/(Ni + Al) relative atomic% of nickel), have been tested. Several parameters have been analysed: the reaction temperature, the catalyst weight/organic flow rate (W/m) ratio, and the effect of the nickel content. The temperatures studied were 550, 650 and 750 °C. At the experimental conditions tested, an increase in the reaction temperature resulted in greater carbon conversion to product gases in non-catalytic and catalytic steam reforming for both model compounds. The nickel content of the catalyst has a significant influence on the steam reforming of oxygenates. The best performance, in terms of H2 yield, is obtained with the catalyst with 28% Ni content. For experiments carried out at space velocities around 30,000 h-1 during 2 h, acetol showed a slightly higher carbon conversion to gas than butanol, though butanol depicted a more constant evolution of carbon conversion throughout. textcopyright 2008 Elsevier B.V. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Acetol (hydroxyacetone) and 1-butanol, model compounds of the aqueous fraction of biomass pyrolysis liquids (bio-oil), have been catalytically steam reformed in a microscale fixed-bed facility. Three Ni coprecipitated catalysts, with varying nickel content (23, 28 and 33% expressed as a Ni/(Ni + Al) relative atomic% of nickel), have been tested. Several parameters have been analysed: the reaction temperature, the catalyst weight/organic flow rate (W/m) ratio, and the effect of the nickel content. The temperatures studied were 550, 650 and 750 °C. At the experimental conditions tested, an increase in the reaction temperature resulted in greater carbon conversion to product gases in non-catalytic and catalytic steam reforming for both model compounds. The nickel content of the catalyst has a significant influence on the steam reforming of oxygenates. The best performance, in terms of H2 yield, is obtained with the catalyst with 28% Ni content. For experiments carried out at space velocities around 30,000 h-1 during 2 h, acetol showed a slightly higher carbon conversion to gas than butanol, though butanol depicted a more constant evolution of carbon conversion throughout. textcopyright 2008 Elsevier B.V. All rights reserved.
2007
Bimbela, Fernando; Oliva, Miriam; Ruiz, Joaquín; García, Lucía; Arauzo, Jesús
Hydrogen production by catalytic steam reforming of acetic acid, a model compound of biomass pyrolysis liquids Journal Article
In: Journal of Analytical and Applied Pyrolysis, vol. 79, no. 1-2 SPEC. ISS., pp. 112–120, 2007, ISSN: 01652370.
@article{Bimbela2007,
title = {Hydrogen production by catalytic steam reforming of acetic acid, a model compound of biomass pyrolysis liquids},
author = {Fernando Bimbela and Miriam Oliva and Joaquín Ruiz and Lucía García and Jesús Arauzo},
doi = {10.1016/j.jaap.2006.11.006},
issn = {01652370},
year = {2007},
date = {2007-05-01},
journal = {Journal of Analytical and Applied Pyrolysis},
volume = {79},
number = {1-2 SPEC. ISS.},
pages = {112--120},
publisher = {Elsevier},
abstract = {An environmentally friendly and cost-competitive way of producing hydrogen is the catalytic steam reforming of biomass pyrolysis liquids, known as bio-oil, which can be separated into two fractions: ligninic and aqueous. Acetic acid has been identified as one of the major organic acids present in the latter, and catalytic steam reforming has been studied for this model compound. Three different Ni coprecipitated catalysts have been prepared with varying nickel content (23, 28 and 33% expressed as a Ni/(Ni + Al) relative at.% of nickel). Several parameters have been analysed using a microscale fixed-bed facility: the effect of the catalyst reduction time, the reaction temperature, the catalyst weight/acetic acid flow rate (W/mHAc) ratio, and the effect of the nickel content. The catalyst with 33% Ni content at 650 °C showed no significant enhancement of the hydrogen yield after 2 h of reduction compared to 1 h under the same experimental conditions. Its performance was poorer when reduced for just 0.5 h. For W/mHAc ratios greater than 2.29 g catalyst min/g acetic acid (650 °C, 33% Ni content) no improvement was observed, whereas for values lower than 2.18 g catalyst min/g acetic acid a decrease in product gas yields occurred rapidly. The temperatures studied were 550, 650 and 750 °C. No decrease in product gas yields was observed at 750 °C under the established experimental conditions. Below this temperature, the aforementioned decrease became more important with decreasing temperatures. The catalyst with 28% Ni content performed better than the other two. textcopyright 2006 Elsevier B.V. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
An environmentally friendly and cost-competitive way of producing hydrogen is the catalytic steam reforming of biomass pyrolysis liquids, known as bio-oil, which can be separated into two fractions: ligninic and aqueous. Acetic acid has been identified as one of the major organic acids present in the latter, and catalytic steam reforming has been studied for this model compound. Three different Ni coprecipitated catalysts have been prepared with varying nickel content (23, 28 and 33% expressed as a Ni/(Ni + Al) relative at.% of nickel). Several parameters have been analysed using a microscale fixed-bed facility: the effect of the catalyst reduction time, the reaction temperature, the catalyst weight/acetic acid flow rate (W/mHAc) ratio, and the effect of the nickel content. The catalyst with 33% Ni content at 650 °C showed no significant enhancement of the hydrogen yield after 2 h of reduction compared to 1 h under the same experimental conditions. Its performance was poorer when reduced for just 0.5 h. For W/mHAc ratios greater than 2.29 g catalyst min/g acetic acid (650 °C, 33% Ni content) no improvement was observed, whereas for values lower than 2.18 g catalyst min/g acetic acid a decrease in product gas yields occurred rapidly. The temperatures studied were 550, 650 and 750 °C. No decrease in product gas yields was observed at 750 °C under the established experimental conditions. Below this temperature, the aforementioned decrease became more important with decreasing temperatures. The catalyst with 28% Ni content performed better than the other two. textcopyright 2006 Elsevier B.V. All rights reserved.