Call:
Email: noemigil@unizar.es
Address:
ABOUT ME
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum .Lorem ipsum dolor sit amet, consectetur.
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum .Lorem ipsum dolor sit amet, consectetur.
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum .Lorem ipsum dolor sit amet, consectetur.
PUBLICATIONS
2018
Dueso, Cristina; Muñoz, Mariano; Moreno, Francisco; Arroyo, Jorge; Gil-Lalaguna, Noemí; Bautista, Ana; Gonzalo, Alberto; Sánchez, José Luis
Performance and emissions of a diesel engine using sunflower biodiesel with a renewable antioxidant additive from bio-oil Journal Article
In: Fuel, vol. 234, pp. 276–285, 2018, ISSN: 00162361.
@article{Dueso2018,
title = {Performance and emissions of a diesel engine using sunflower biodiesel with a renewable antioxidant additive from bio-oil},
author = {Cristina Dueso and Mariano Muñoz and Francisco Moreno and Jorge Arroyo and Noemí Gil-Lalaguna and Ana Bautista and Alberto Gonzalo and José Luis Sánchez},
doi = {10.1016/j.fuel.2018.07.013},
issn = {00162361},
year = {2018},
date = {2018-12-01},
journal = {Fuel},
volume = {234},
pages = {276--285},
publisher = {Elsevier Ltd},
abstract = {The aim of this study is to test the behaviour of sunflower biodiesel in a diesel engine after being treated with a natural antioxidant additive produced from bio-oil extraction (final dosage of bio-oil compounds in doped biodiesel of 1.9 wt%). The influence of this renewable additive in both the engine performance and the produced emissions was evaluated. Five more fuels were used for the sake of comparison: petroleum diesel, neat sunflower biodiesel without additives, commercial biodiesel, commercial B10 blend and another B10 blend prepared from petro-diesel and doped sunflower biodiesel. Brake power was found to be similar for the six fuels, while the brake specific fuel consumption and the brake thermal efficiency were higher for biodiesel fuels. Only slight differences (<1%) were observed between the doped biodiesel and the neat one, showing that the bio-oil based additive did not negatively affect the general performance of the engine. Regarding gas emissions (analysed according to the European Stationary Cycle), weighted average emissions of NOx and CO2 were higher for biodiesel fuels, while CO and opacity factor were lower in that case. Incorporating the bio-oil based additive reduced NOx emissions and smoke opacity by 3.0% and 4.4% compared with neat biodiesel, respectively, whilst CO and HC emissions increased by 0.7 and 14.3% respectively, values still remaining below those of diesel.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The aim of this study is to test the behaviour of sunflower biodiesel in a diesel engine after being treated with a natural antioxidant additive produced from bio-oil extraction (final dosage of bio-oil compounds in doped biodiesel of 1.9 wt%). The influence of this renewable additive in both the engine performance and the produced emissions was evaluated. Five more fuels were used for the sake of comparison: petroleum diesel, neat sunflower biodiesel without additives, commercial biodiesel, commercial B10 blend and another B10 blend prepared from petro-diesel and doped sunflower biodiesel. Brake power was found to be similar for the six fuels, while the brake specific fuel consumption and the brake thermal efficiency were higher for biodiesel fuels. Only slight differences (<1%) were observed between the doped biodiesel and the neat one, showing that the bio-oil based additive did not negatively affect the general performance of the engine. Regarding gas emissions (analysed according to the European Stationary Cycle), weighted average emissions of NOx and CO2 were higher for biodiesel fuels, while CO and opacity factor were lower in that case. Incorporating the bio-oil based additive reduced NOx emissions and smoke opacity by 3.0% and 4.4% compared with neat biodiesel, respectively, whilst CO and HC emissions increased by 0.7 and 14.3% respectively, values still remaining below those of diesel.
Moreira, Rui; Vaz, Rui; Portugal, António; Gil-Lalaguna, Noemí; Sánchez, José Luis; Bimbela, Fernando
Gasification of Charcoal in Air, Oxygen, and Steam Mixtures over a $gamma$-Al2O3 Fluidized Bed Journal Article
In: Energy and Fuels, vol. 32, no. 1, pp. 406–415, 2018, ISSN: 15205029.
@article{Moreira2018,
title = {Gasification of Charcoal in Air, Oxygen, and Steam Mixtures over a $gamma$-Al2O3 Fluidized Bed},
author = {Rui Moreira and Rui Vaz and António Portugal and Noemí Gil-Lalaguna and José Luis Sánchez and Fernando Bimbela},
url = {https://pubs.acs.org/sharingguidelines},
doi = {10.1021/acs.energyfuels.7b02257},
issn = {15205029},
year = {2018},
date = {2018-01-01},
journal = {Energy and Fuels},
volume = {32},
number = {1},
pages = {406--415},
publisher = {American Chemical Society},
abstract = {Charcoal was gasified using air and oxygen as well as with mixtures of oxygen and steam, aiming to produce a gas stream with high hydrogen content. The effects of the equivalence ratio (ER) and steam-to-carbon ratio (S/C) on carbon conversion, producer gas yield, gas heating value, and composition as well as on the apparent energy efficiency (AEE) of the process were studied. The gasification experiments were performed in a laboratory-scale fluidized bed rig working at 1173 K and atmospheric pressure and using $gamma$-Al2O3 as bed material. Results showed that, on a N2-free basis, the composition of the producer gas obtained by gasification with air and pure oxygen were comparable when using the same ER. Furthermore, carbon fraction converted into gas improved when ER was increased from 0.25 up to 0.35, as well as when the S/C was increased to 0.625. The highest producer gas yield was obtained using ER = 0.35 and S/C = 0.625, while the highest hydrogen concentration in the produced gas was achieved using ER = 0.25 and S/C = 0.625. The highest hydrogen yield (0.412 N m3/kg charcoal) and the highest AEE (33.43%) were achieved by using S/C = 0.625 and ER = 0.3 (oxygen). The autothermal gasification of the charcoal was possible in the experimental rig used in this work by selecting ER = 0.3 and S/C = 0.5, allowing the production of a gas with a heating value of 8.3 MJ/Nm3 while reducing the carbon conversion into gas to 49.4 wt %.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Charcoal was gasified using air and oxygen as well as with mixtures of oxygen and steam, aiming to produce a gas stream with high hydrogen content. The effects of the equivalence ratio (ER) and steam-to-carbon ratio (S/C) on carbon conversion, producer gas yield, gas heating value, and composition as well as on the apparent energy efficiency (AEE) of the process were studied. The gasification experiments were performed in a laboratory-scale fluidized bed rig working at 1173 K and atmospheric pressure and using $gamma$-Al2O3 as bed material. Results showed that, on a N2-free basis, the composition of the producer gas obtained by gasification with air and pure oxygen were comparable when using the same ER. Furthermore, carbon fraction converted into gas improved when ER was increased from 0.25 up to 0.35, as well as when the S/C was increased to 0.625. The highest producer gas yield was obtained using ER = 0.35 and S/C = 0.625, while the highest hydrogen concentration in the produced gas was achieved using ER = 0.25 and S/C = 0.625. The highest hydrogen yield (0.412 N m3/kg charcoal) and the highest AEE (33.43%) were achieved by using S/C = 0.625 and ER = 0.3 (oxygen). The autothermal gasification of the charcoal was possible in the experimental rig used in this work by selecting ER = 0.3 and S/C = 0.5, allowing the production of a gas with a heating value of 8.3 MJ/Nm3 while reducing the carbon conversion into gas to 49.4 wt %.
2017
Gil-Lalaguna, Noemí; Bautista, Ana; Gonzalo, Alberto; Sánchez, José Luis; Arauzo, Jesús
Obtaining biodiesel antioxidant additives by hydrothermal treatment of lignocellulosic bio-oil Journal Article
In: Fuel Processing Technology, vol. 166, pp. 1–7, 2017, ISSN: 03783820.
@article{Gil-Lalaguna2017,
title = {Obtaining biodiesel antioxidant additives by hydrothermal treatment of lignocellulosic bio-oil},
author = {Noemí Gil-Lalaguna and Ana Bautista and Alberto Gonzalo and José Luis Sánchez and Jesús Arauzo},
doi = {10.1016/j.fuproc.2017.05.020},
issn = {03783820},
year = {2017},
date = {2017-11-01},
journal = {Fuel Processing Technology},
volume = {166},
pages = {1--7},
publisher = {Elsevier B.V.},
abstract = {The potential use of bio-oil as a small-dosage additive for improving biodiesel oxidation stability has been investigated in this work. Lignocellulosic bio-oil was high-pressure processed under different mixtures of water and organic solvents in order to promote depolymerization of the high molecular lignin still present in bio-oil and increase the content of phenolics, whose antioxidant potential is known. In fact, the antioxidant potential of bio-oil was found to noticeably enhance after the hydrothermal treatment. While the addition of 2% of crude bio-oil improved biodiesel oxidation stability by 135%, the same amount of hydrotreated bio-oil (water, 300 °C, 8.5 MPa) led to an oxidation stability improvement of 400%, which was related to the increase in the concentration of catechol, as well as to the modification of antioxidant properties of the pyrolytic lignin fraction.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The potential use of bio-oil as a small-dosage additive for improving biodiesel oxidation stability has been investigated in this work. Lignocellulosic bio-oil was high-pressure processed under different mixtures of water and organic solvents in order to promote depolymerization of the high molecular lignin still present in bio-oil and increase the content of phenolics, whose antioxidant potential is known. In fact, the antioxidant potential of bio-oil was found to noticeably enhance after the hydrothermal treatment. While the addition of 2% of crude bio-oil improved biodiesel oxidation stability by 135%, the same amount of hydrotreated bio-oil (water, 300 °C, 8.5 MPa) led to an oxidation stability improvement of 400%, which was related to the increase in the concentration of catechol, as well as to the modification of antioxidant properties of the pyrolytic lignin fraction.
García, Manuel; Botella, Lucía; Gil-Lalaguna, Noemí; Arauzo, Jesús; Gonzalo, Alberto; Sánchez, José Luis
Antioxidants for biodiesel: Additives prepared from extracted fractions of bio-oil Journal Article
In: Fuel Processing Technology, vol. 156, pp. 407–414, 2017, ISSN: 03783820.
@article{Garcia2017,
title = {Antioxidants for biodiesel: Additives prepared from extracted fractions of bio-oil},
author = {Manuel García and Lucía Botella and Noemí Gil-Lalaguna and Jesús Arauzo and Alberto Gonzalo and José Luis Sánchez},
doi = {10.1016/j.fuproc.2016.10.001},
issn = {03783820},
year = {2017},
date = {2017-02-01},
journal = {Fuel Processing Technology},
volume = {156},
pages = {407--414},
publisher = {Elsevier B.V.},
abstract = {Unlike petroleum diesel, the chemical structure of biodiesel makes it prone to oxidation during long-term storage, thus involving fuel quality deterioration. Therefore, the addition of antioxidants is usually required to meet the quality standards for biodiesel commercialization. Synthetic sterically-hindered phenols have been usually employed for this purpose as free radical scavenging antioxidants. However, naturally occurring phenolics are also available, for example, in the bio-oil produced in the pyrolysis of lignocellulosic biomass. In this work, the antioxidant potential of extracted fractions of lignocellulosic bio-oil has been evaluated. Different organic solvents were tested as extraction agents, acetate esters being the best ones for incorporating bio-oil antioxidant compounds into biodiesel. In the best case, the incorporation of a small concentration of bio-oil compounds (< 4 wt.%) led to an improvement of the biodiesel oxidation stability of 475% which, in our case, was enough to meet the European standard requirement.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Unlike petroleum diesel, the chemical structure of biodiesel makes it prone to oxidation during long-term storage, thus involving fuel quality deterioration. Therefore, the addition of antioxidants is usually required to meet the quality standards for biodiesel commercialization. Synthetic sterically-hindered phenols have been usually employed for this purpose as free radical scavenging antioxidants. However, naturally occurring phenolics are also available, for example, in the bio-oil produced in the pyrolysis of lignocellulosic biomass. In this work, the antioxidant potential of extracted fractions of lignocellulosic bio-oil has been evaluated. Different organic solvents were tested as extraction agents, acetate esters being the best ones for incorporating bio-oil antioxidant compounds into biodiesel. In the best case, the incorporation of a small concentration of bio-oil compounds (< 4 wt.%) led to an improvement of the biodiesel oxidation stability of 475% which, in our case, was enough to meet the European standard requirement.
2015
Gil-Lalaguna, Noemí; Sánchez, José Luis; Murillo, María Benita; Gea, Gloria
Use of sewage sludge combustion ash and gasification ash for high-temperature desulphurization of different gas streams Journal Article
In: Fuel, vol. 141, pp. 99–108, 2015, ISSN: 00162361.
@article{Gil-Lalaguna2015,
title = {Use of sewage sludge combustion ash and gasification ash for high-temperature desulphurization of different gas streams},
author = {Noemí Gil-Lalaguna and José Luis Sánchez and María Benita Murillo and Gloria Gea},
doi = {10.1016/j.fuel.2014.10.036},
issn = {00162361},
year = {2015},
date = {2015-02-01},
journal = {Fuel},
volume = {141},
pages = {99--108},
publisher = {Elsevier Ltd},
abstract = {Due to its metal content, sewage sludge ash appears as a potential sorbent material for H2S removal at high temperature. The desulphurization ability of the solid by-products of combustion and gasification of sewage sludge has been evaluated in this work. Ash characterization results revealed that metal fraction in sewage sludge did not remained completely inert during combustion and gasification processes. Iron content was lower in the gasification ash and X-ray patterns showed different crystalline phases in the solids: Fe2O3 in the combustion ash and Fe3O4 in the gasification ash. These differences resulted in a lower sulphur capture capacity of the gasification ash. Desulphurization tests were carried out in a lab-scale fixed bed reactor operating at 600-800 °C. Different gases containing 5000 ppmv H2S (H2S/N2 mixture and synthetic gasification gas) were used. The H2S breakthrough curves were negatively affected by the reducing atmosphere created by the gasification gas and by the presence of steam in the reaction medium. However, H2S breakthrough curves alone do not provide enough information to evaluate the sulphur capture capacity of the sorbent materials. Ultimate analyses of the spent solid samples showed that the total amount of H2S removed from the gas was only partially captured in the ash. Thermodynamic data pointed to a significant fraction of sulphur forming part of other gases, such as SO2. In the best operating conditions, an outlet gas with less than 100 ppmv H2S was obtained during 300 min, thus resulting in a sulphur loading of 63 mg S gash-1. This experimental sulphur content was 39% lower than the maximum value predicted by equilibrium simulations.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Due to its metal content, sewage sludge ash appears as a potential sorbent material for H2S removal at high temperature. The desulphurization ability of the solid by-products of combustion and gasification of sewage sludge has been evaluated in this work. Ash characterization results revealed that metal fraction in sewage sludge did not remained completely inert during combustion and gasification processes. Iron content was lower in the gasification ash and X-ray patterns showed different crystalline phases in the solids: Fe2O3 in the combustion ash and Fe3O4 in the gasification ash. These differences resulted in a lower sulphur capture capacity of the gasification ash. Desulphurization tests were carried out in a lab-scale fixed bed reactor operating at 600-800 °C. Different gases containing 5000 ppmv H2S (H2S/N2 mixture and synthetic gasification gas) were used. The H2S breakthrough curves were negatively affected by the reducing atmosphere created by the gasification gas and by the presence of steam in the reaction medium. However, H2S breakthrough curves alone do not provide enough information to evaluate the sulphur capture capacity of the sorbent materials. Ultimate analyses of the spent solid samples showed that the total amount of H2S removed from the gas was only partially captured in the ash. Thermodynamic data pointed to a significant fraction of sulphur forming part of other gases, such as SO2. In the best operating conditions, an outlet gas with less than 100 ppmv H2S was obtained during 300 min, thus resulting in a sulphur loading of 63 mg S gash-1. This experimental sulphur content was 39% lower than the maximum value predicted by equilibrium simulations.