Lucía García

@article{Bona2008,

title = {Toluene steam reforming using coprecipitated Ni/Al catalysts modified with lanthanum or cobalt},

author = {Sergio Bona and Patricia Guillén and Germán J Alcalde and Lucía García and Rafael Bilbao},

doi = {10.1016/j.cej.2007.05.022},

issn = {13858947},

year  = {2008},

date = {2008-04-01},

journal = {Chemical Engineering Journal},

volume = {137},

number = {3},

pages = {587--597},

publisher = {Elsevier},

abstract = {Toluene has been chosen as a model compound of biomass gasification tar and its destruction has been studied by steam reforming. The experiments have been performed in a bench scale installation that uses a fluidized bed reactor with a technology very similar to the Waterloo Fast Pyrolysis Process (WFPP). All the experiments have been carried out at 650 °C and atmospheric pressure. Ni/Al/La catalysts with La/Ni ratios of 0, 0.044, 0.088 and 0.13 have been tested, the middle two showing the best performance. Ni/Co/Al catalysts with Co/Ni ratios of 0, 0.025, 0.10 and 0.25 have also been tested. The Ni/Co/Al catalyst with the best results is that with a Co/Ni ratio of 0.10. For the Ni/Co/Al catalyst with Co/Ni = 0.10, the influence of the steam/carbon molar (S/C) ratio on gas yields has been studied for values from 5.5 to 1.5. Yields of H2 and CO2 decrease, while CH4 and CO yields increase when the S/C ratio diminishes. The influence of the catalyst weight/toluene flow rate (W/mt) ratio has been analyzed for Ni/Al/La catalyst with a La/Ni ratio of 0.088 and Ni/Co/Al catalyst with Co/Ni = 0.10. For both catalysts, carbon conversion to gas, total gas, H2 and CO2 yields increase when the W/mt ratio increases. textcopyright 2007 Elsevier B.V. All rights reserved.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@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}

}

@article{RomanGaldamez2005,

title = {Hydrogen production by steam reforming of bio-oil using coprecipitated Ni-Al catalysts. Acetic acid as a model compound},

author = {J Román Galdámez and Lucía García and Rafael Bilbao},

url = {https://pubs.acs.org/sharingguidelines},

doi = {10.1021/ef049718g},

issn = {08870624},

year  = {2005},

date = {2005-05-01},

journal = {Energy and Fuels},

volume = {19},

number = {3},

pages = {1133--1142},

publisher = {American Chemical Society},

abstract = {Catalytic steam reforming of bio-oil is a promising process for hydrogen production from biomass. Bio-oil is a complex mixture of a large number of compounds (acids, aldehydes, alcohols, and ketones, among other compounds), and acetic acid has been selected as a model compound. The experimental work has been conducted in a fluidized-bed reactor. Noncatalytic steam reforming of acetic acid has been performed from 450 °C to 700 °C. For catalytic experiments, coprecipitated Ni-Al catalysts, some promoted with lanthanum, have been selected, because of their high mechanical strength and suitable performance in biomass steam gasification. The presence of the catalyst, its reduction, promotion with lanthanum, and the influence of space velocity on gas yields have been analyzed at 650 °C. Catalytic experiments show a significant increase in total gas, H2, and CO2 yields, whereas CH4 and C2 yields decrease, when compared with those from noncatalytic experiments. Gas yields obtained in the catalytic process present a shift from the noncatalytic process to equilibrium gas yields. Promotion with lanthanum does not increase the H2 yield achieved with the Ni-Al catalyst. Simple first-order kinetic equations have been proposed for the formation of H2 and CO2 and the disappearance of CH4 and C2. textcopyright 2005 American Chemical Society.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Garcia2002,

title = {Hydrogen production by steam gasification of biomass using Ni-Al coprecipitated catalysts promoted with magnesium},

author = {Lucía García and A Benedicto and E Romeo and María L Salvador and Jesús Arauzo and Rafael Bilbao},

url = {https://pubs.acs.org/sharingguidelines},

doi = {10.1021/ef020035f},

issn = {08870624},

year  = {2002},

date = {2002-09-01},

journal = {Energy and Fuels},

volume = {16},

number = {5},

pages = {1222--1230},

publisher = {American Chemical Society},

abstract = {Ni-Al coprecipitated catalysts promoted with magnesium have been prepared using the rising and the constant pH techniques, two precipitant agents [(1) KOH and K2CO3, and (2) NH4OH)] and different metal contents. Catalyst characterization by temperature-programmed reduction and CO2 reforming of methane as a test reaction served to select the appropriate catalysts for use in the steam gasification of biomass. The catalysts selected were NiMgAl2O5, prepared at constant pH and precipitated with KOH and K2CO3; NiMgAl4O8 and NiMgAl1.24O3.86, both prepared at increasing pH with NH4OH. Biomass steam gasification experiments were carried out at 700 °C and at atmospheric pressure using different steam/biomass (S/B) and catalyst weightY biomass flow rate (W/B) ratios. From an analysis of the results obtained, the initial activity and stability of the catalysts have been studied. The NiMgAl2O5 catalyst presents the best performance showing the highest initial activity and stability. This work evidences an improvement of the NiMgAl2O5 catalyst with respect to the previously studied NiAl2O4 catalyst.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}