Teléfono:
Email: mabian@unizar.es
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ABOUT ME h5>
Associate professor at the Department of Chemical and Environmental Engineering of the University of Zaragoza (Spain), and researcher at the Thermochemical Process Group (GPT) of the Aragón Institute of Engineering Research (I3A) of the University of Zaragoza (Spain).
My research interests are in the fields of high temperature chemistry, chemical kinetic modeling, and formation and destruction of air pollutants (nitrogen oxides, sulfur compounds, …) in energetic and industrial processes/applications.
BIOGRAPHY
I graduated with a Master in Chemical Engineering from the University of Zaragoza (Spain) and in 2013 I got the degree of PhD in Chemical Engineering at the same university. As part of this investigation, in January-April 2011, I made a short term collaboration at the (Combustion Harmful Emission Control) CHEC group of the Technical University of Denmark. My research activities were related to hydrocarbon conversion in presence of different gaseous compounds that can be typically present in atmospheres with recycled flue gas (RFG), such as CO2, NOx or SO2, to provide of the necessary experimental data both to get
insight into the phenomena controlling the process and to improve and update a gas-phase combustion scheme in relation to different reaction environments.
In 2015- 2017 I worked as a post-doctoral researcher at the Instituto de Carboquímica (ICB) of the Spanish National Research Council (CSIC), with a research Grant funded by the Spanish Government.
During this time my research activities were focused on the development and optimization of oxygen carriers for the Chemical Looping Combustion process. In June-September 2016 I made a short term collaboration at the Department of Mechanical Engineering (DEM) of the Technical University of Lisbon (Portugal), to study the influence of the presence of metals on the combustion of biomass.
Since 2017, I am a researcher at the Thermochemical Process Group (GPT) of the Aragón Institute of Engineering Research (I3A) of the University of Zaragoza (Spain), performing fundamental studies related to the formation and destruction of main pollutants in thermo-chemical processes.
PUBLICATIONS h5>
2015
Abián, María; Cebrián, Marta; Millera, Ángela; Bilbao, Rafael; Alzueta, María U
CS2 and COS conversion under different combustion conditions Artículo de revista
En: Combustion and Flame, vol. 162, no 5, pp. 2119–2127, 2015, ISSN: 15562921.
@article{Abian2015a,
title = {CS2 and COS conversion under different combustion conditions},
author = {María Abián and Marta Cebrián and Ángela Millera and Rafael Bilbao and María U Alzueta},
doi = {10.1016/j.combustflame.2015.01.010},
issn = {15562921},
year = {2015},
date = {2015-05-01},
journal = {Combustion and Flame},
volume = {162},
number = {5},
pages = {2119--2127},
publisher = {Elsevier Inc.},
abstract = {Carbon disulfide (CS2) and carbonyl sulfide (COS) can be generated from sulfur-containing species in a combustion chamber, and thus may be present at the exhaust gas and even emitted to the atmosphere. Therefore, it is of great interest to study and understand the mechanism through which the conversion of CS2 and COS takes place under combustion conditions, both to develop strategies to control these emissions and, consequently, to preserve the environment.In this context, a combined experimental and modeling study addressing the conversion of CS2 and COS under different combustion conditions has been undertaken. The developed kinetic mechanism has been validated against experimental data obtained in the present work of the moist conversion of CS2 and COS in a laboratory quartz flow reactor. Experiments were performed at atmospheric pressure, in the 300-1400K temperature range, and under different combustion environments, ranging from fuel rich to fuel lean conditions, specifically air excess ratios of $łambda$=0.2, 0.7, 1, 2 and 20. The experimental results have been analyzed and interpreted in terms of this detailed gas phase kinetic mechanism, and the elementary steps involving CS2 and COS conversion as a function of the different operating conditions have been identified.Results indicate that the oxidation of both, CS2 and COS, is produced by interaction with the radical pool, mainly with O radicals, and to a lesser extent with S radicals, being this last consumption step more relevant as the reaction environment becomes fuel richer. The CS2 conversion involves a more complex process compared to COS, since COS is an intermediate product during the oxidation of CS2 and thus its conversion process also involves the COS chemistry.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Carbon disulfide (CS2) and carbonyl sulfide (COS) can be generated from sulfur-containing species in a combustion chamber, and thus may be present at the exhaust gas and even emitted to the atmosphere. Therefore, it is of great interest to study and understand the mechanism through which the conversion of CS2 and COS takes place under combustion conditions, both to develop strategies to control these emissions and, consequently, to preserve the environment.In this context, a combined experimental and modeling study addressing the conversion of CS2 and COS under different combustion conditions has been undertaken. The developed kinetic mechanism has been validated against experimental data obtained in the present work of the moist conversion of CS2 and COS in a laboratory quartz flow reactor. Experiments were performed at atmospheric pressure, in the 300-1400K temperature range, and under different combustion environments, ranging from fuel rich to fuel lean conditions, specifically air excess ratios of $łambda$=0.2, 0.7, 1, 2 and 20. The experimental results have been analyzed and interpreted in terms of this detailed gas phase kinetic mechanism, and the elementary steps involving CS2 and COS conversion as a function of the different operating conditions have been identified.Results indicate that the oxidation of both, CS2 and COS, is produced by interaction with the radical pool, mainly with O radicals, and to a lesser extent with S radicals, being this last consumption step more relevant as the reaction environment becomes fuel richer. The CS2 conversion involves a more complex process compared to COS, since COS is an intermediate product during the oxidation of CS2 and thus its conversion process also involves the COS chemistry.
2014
Abián, María; Peribáñez, Eduardo; Millera, Ángela; Bilbao, Rafael; Alzueta, María U
Impact of nitrogen oxides (NO, NO2, N2O) on the formation of soot Artículo de revista
En: Combustion and Flame, vol. 161, no 1, pp. 280–287, 2014.
@article{Abian2014,
title = {Impact of nitrogen oxides (NO, NO2, N2O) on the formation of soot},
author = {María Abián and Eduardo Peribáñez and Ángela Millera and Rafael Bilbao and María U Alzueta},
year = {2014},
date = {2014-01-01},
journal = {Combustion and Flame},
volume = {161},
number = {1},
pages = {280--287},
abstract = {The emission of both nitrogen oxides and soot from combustion processes is still a matter of concern. When a flue gas recirculation (FGR) technique is applied, the presence of a given nitrogen oxide in the recirculated mixture can affect the emissions of other pollutants, such as soot, and be used for its control in a combustion process. In this context, the present work is focused on the identification of the effect of the main nitrogen oxides (NO, NO2 and N2O) present in combustion systems on soot and main product gases formation from the pyrolysis of ethylene, at atmospheric pressure and in the 975-1475K temperature range. The experimental results are examined to assess the effectiveness of each nitrogen oxide in suppressing or boosting soot formation, to achieve the possible nitrogen oxides reduction, and to identify the elementary steps involved in the nitrogen oxides and ethylene conversion as function of the different nitrogen oxides. This analysis is supported on model calculations.The main results indicate that the presence of nitrogen oxides influences the formation of soot, yielding different results depending on the nitrogen oxide added, its initial concentration and the reaction temperature. Among the different nitrogen oxides studied (NO, NO2 and N2O), the lowest sooting tendency has been achieved in the presence of NO2, followed by NO and finally N2O. Different mechanisms appear to be responsible for soot and nitrogen oxides reduction, including both oxidation and reburn type reactions. Furthermore, representative soot samples formed from the different C2H4-nitrogen oxide mixtures have been characterized through elemental analysis, BET surface area analysis and TEM in order to explore the influence, if any, of the nitrogen oxide present. textcopyright 2013 The Combustion Institute.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The emission of both nitrogen oxides and soot from combustion processes is still a matter of concern. When a flue gas recirculation (FGR) technique is applied, the presence of a given nitrogen oxide in the recirculated mixture can affect the emissions of other pollutants, such as soot, and be used for its control in a combustion process. In this context, the present work is focused on the identification of the effect of the main nitrogen oxides (NO, NO2 and N2O) present in combustion systems on soot and main product gases formation from the pyrolysis of ethylene, at atmospheric pressure and in the 975-1475K temperature range. The experimental results are examined to assess the effectiveness of each nitrogen oxide in suppressing or boosting soot formation, to achieve the possible nitrogen oxides reduction, and to identify the elementary steps involved in the nitrogen oxides and ethylene conversion as function of the different nitrogen oxides. This analysis is supported on model calculations.The main results indicate that the presence of nitrogen oxides influences the formation of soot, yielding different results depending on the nitrogen oxide added, its initial concentration and the reaction temperature. Among the different nitrogen oxides studied (NO, NO2 and N2O), the lowest sooting tendency has been achieved in the presence of NO2, followed by NO and finally N2O. Different mechanisms appear to be responsible for soot and nitrogen oxides reduction, including both oxidation and reburn type reactions. Furthermore, representative soot samples formed from the different C2H4-nitrogen oxide mixtures have been characterized through elemental analysis, BET surface area analysis and TEM in order to explore the influence, if any, of the nitrogen oxide present. textcopyright 2013 The Combustion Institute.
2013
Fleig, Daniel; Alzueta, María U; Normann, Fredrik; Abián, María; Andersson, Klas; Johnsson, Filip
Measurement and modeling of sulfur trioxide formation in a flow reactor under post-flame conditions Artículo de revista
En: Combustion and Flame, vol. 160, no 6, pp. 1142–1151, 2013, ISSN: 00102180.
@article{Fleig2013,
title = {Measurement and modeling of sulfur trioxide formation in a flow reactor under post-flame conditions},
author = {Daniel Fleig and María U Alzueta and Fredrik Normann and María Abián and Klas Andersson and Filip Johnsson},
url = {http://www.sciencedirect.com/science/article/pii/S0010218013000448},
issn = {00102180},
year = {2013},
date = {2013-06-01},
journal = {Combustion and Flame},
volume = {160},
number = {6},
pages = {1142--1151},
abstract = {The present work focuses on the impacts of different combustion parameters on the formation of sulfur trioxide (SO3). The outlet SO3 concentrations from a quartz reactor operated within the temperature range of 800K to 1673K were measured using the controlled condensation method. Post-flame conditions were examined with and without combustibles, and the effects of SO2, O2, NO, H2O, and CO2 on SO3 formation were investigated. The formation of SO3 along the quartz reactor was modeled with a detailed chemical reaction mechanism by assuming plug-flow and using measured temperature profiles. Only reactions that occurred in the gas phase were considered. In the absence of combustibles, the outlet SO3 concentration increased as the experimental temperature and O2 concentration increased. When reactive gases (e.g., NO, CO, and CH4) were introduced, the formation of SO3 was increased, mainly as the result of increased concentrations of radicals. In addition, the combustion atmosphere (comprising N2, CO2, and H2O) influenced the amount of SO3 formed. A higher concentration of H2O clearly increased SO3 formation in the absence of combustibles.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The present work focuses on the impacts of different combustion parameters on the formation of sulfur trioxide (SO3). The outlet SO3 concentrations from a quartz reactor operated within the temperature range of 800K to 1673K were measured using the controlled condensation method. Post-flame conditions were examined with and without combustibles, and the effects of SO2, O2, NO, H2O, and CO2 on SO3 formation were investigated. The formation of SO3 along the quartz reactor was modeled with a detailed chemical reaction mechanism by assuming plug-flow and using measured temperature profiles. Only reactions that occurred in the gas phase were considered. In the absence of combustibles, the outlet SO3 concentration increased as the experimental temperature and O2 concentration increased. When reactive gases (e.g., NO, CO, and CH4) were introduced, the formation of SO3 was increased, mainly as the result of increased concentrations of radicals. In addition, the combustion atmosphere (comprising N2, CO2, and H2O) influenced the amount of SO3 formed. A higher concentration of H2O clearly increased SO3 formation in the absence of combustibles.
2012
Abián, María; Jensen, Anker D; Glarborg, Peter; Alzueta, María U
Soot Reactivity in Conventional Combustion and Oxy-fuel Combustion Environments Artículo de revista
En: Energy & Fuels, vol. 26, no 8, pp. 5337–5344, 2012, ISSN: 0887-0624.
@article{Abian2012,
title = {Soot Reactivity in Conventional Combustion and Oxy-fuel Combustion Environments},
author = {María Abián and Anker D Jensen and Peter Glarborg and María U Alzueta},
url = {http://dx.doi.org/10.1021/ef300670q},
issn = {0887-0624},
year = {2012},
date = {2012-08-01},
journal = {Energy & Fuels},
volume = {26},
number = {8},
pages = {5337--5344},
publisher = {American Chemical Society},
abstract = {A study of the reactivity of soot produced from ethylene pyrolysis at different temperatures and CO2 atmospheres toward O2 and CO2 has been carried out using a thermogravimetric analyzer. The purpose was to quantify how soot reactivity is affected by the gas environment and temperature history of the carbon, as well as to compare the soot reactivity toward O2 and CO2. Soot samples were either oxidized in 5% O2 or gasified in 10, 50, and 90% CO2 atmospheres, during non-isothermal runs at 10 K/min. Soot oxidation was observed at temperatures of 400?500 K lower than soot gasification, showing higher reactivity toward oxygen than CO2. Independent of the environment history of the soot samples, the soot samples formed at lower temperatures have higher reactivity toward both O2 and CO2 than the soot samples obtained at higher temperatures. The presence of CO2 during the formation of the soot only affected the soot reactivity at the highest formation temperature (1475 K) and CO2 concentration (78.5%). Under these conditions, the soot reactivity was observed to increase by a factor of about 2.6 compared to soot formed in N2 at the same temperature. We attribute the increased reactivity to a higher micropore surface area, facilitated by the gasification reaction at a high temperature. The intrinsic kinetics for oxidation and gasification of soot were obtained by applying the volumetric reaction model.
A study of the reactivity of soot produced from ethylene pyrolysis at different temperatures and CO2 atmospheres toward O2 and CO2 has been carried out using a thermogravimetric analyzer. The purpose was to quantify how soot reactivity is affected by the gas environment and temperature history of the carbon, as well as to compare the soot reactivity toward O2 and CO2. Soot samples were either oxidized in 5% O2 or gasified in 10, 50, and 90% CO2 atmospheres, during non-isothermal runs at 10 K/min. Soot oxidation was observed at temperatures of 400?500 K lower than soot gasification, showing higher reactivity toward oxygen than CO2. Independent of the environment history of the soot samples, the soot samples formed at lower temperatures have higher reactivity toward both O2 and CO2 than the soot samples obtained at higher temperatures. The presence of CO2 during the formation of the soot only affected the soot reactivity at the highest formation temperature (1475 K) and CO2 concentration (78.5%). Under these conditions, the soot reactivity was observed to increase by a factor of about 2.6 compared to soot formed in N2 at the same temperature. We attribute the increased reactivity to a higher micropore surface area, facilitated by the gasification reaction at a high temperature. The intrinsic kinetics for oxidation and gasification of soot were obtained by applying the volumetric reaction model.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A study of the reactivity of soot produced from ethylene pyrolysis at different temperatures and CO2 atmospheres toward O2 and CO2 has been carried out using a thermogravimetric analyzer. The purpose was to quantify how soot reactivity is affected by the gas environment and temperature history of the carbon, as well as to compare the soot reactivity toward O2 and CO2. Soot samples were either oxidized in 5% O2 or gasified in 10, 50, and 90% CO2 atmospheres, during non-isothermal runs at 10 K/min. Soot oxidation was observed at temperatures of 400?500 K lower than soot gasification, showing higher reactivity toward oxygen than CO2. Independent of the environment history of the soot samples, the soot samples formed at lower temperatures have higher reactivity toward both O2 and CO2 than the soot samples obtained at higher temperatures. The presence of CO2 during the formation of the soot only affected the soot reactivity at the highest formation temperature (1475 K) and CO2 concentration (78.5%). Under these conditions, the soot reactivity was observed to increase by a factor of about 2.6 compared to soot formed in N2 at the same temperature. We attribute the increased reactivity to a higher micropore surface area, facilitated by the gasification reaction at a high temperature. The intrinsic kinetics for oxidation and gasification of soot were obtained by applying the volumetric reaction model.
A study of the reactivity of soot produced from ethylene pyrolysis at different temperatures and CO2 atmospheres toward O2 and CO2 has been carried out using a thermogravimetric analyzer. The purpose was to quantify how soot reactivity is affected by the gas environment and temperature history of the carbon, as well as to compare the soot reactivity toward O2 and CO2. Soot samples were either oxidized in 5% O2 or gasified in 10, 50, and 90% CO2 atmospheres, during non-isothermal runs at 10 K/min. Soot oxidation was observed at temperatures of 400?500 K lower than soot gasification, showing higher reactivity toward oxygen than CO2. Independent of the environment history of the soot samples, the soot samples formed at lower temperatures have higher reactivity toward both O2 and CO2 than the soot samples obtained at higher temperatures. The presence of CO2 during the formation of the soot only affected the soot reactivity at the highest formation temperature (1475 K) and CO2 concentration (78.5%). Under these conditions, the soot reactivity was observed to increase by a factor of about 2.6 compared to soot formed in N2 at the same temperature. We attribute the increased reactivity to a higher micropore surface area, facilitated by the gasification reaction at a high temperature. The intrinsic kinetics for oxidation and gasification of soot were obtained by applying the volumetric reaction model.
A study of the reactivity of soot produced from ethylene pyrolysis at different temperatures and CO2 atmospheres toward O2 and CO2 has been carried out using a thermogravimetric analyzer. The purpose was to quantify how soot reactivity is affected by the gas environment and temperature history of the carbon, as well as to compare the soot reactivity toward O2 and CO2. Soot samples were either oxidized in 5% O2 or gasified in 10, 50, and 90% CO2 atmospheres, during non-isothermal runs at 10 K/min. Soot oxidation was observed at temperatures of 400?500 K lower than soot gasification, showing higher reactivity toward oxygen than CO2. Independent of the environment history of the soot samples, the soot samples formed at lower temperatures have higher reactivity toward both O2 and CO2 than the soot samples obtained at higher temperatures. The presence of CO2 during the formation of the soot only affected the soot reactivity at the highest formation temperature (1475 K) and CO2 concentration (78.5%). Under these conditions, the soot reactivity was observed to increase by a factor of about 2.6 compared to soot formed in N2 at the same temperature. We attribute the increased reactivity to a higher micropore surface area, facilitated by the gasification reaction at a high temperature. The intrinsic kinetics for oxidation and gasification of soot were obtained by applying the volumetric reaction model.
Abián, María; Millera, Ángela; Bilbao, Rafael; Alzueta, María U
Effect of Recirculation Gases on Soot Formed from Ethylene Pyrolysis Artículo de revista
En: Combustion Science and Technology, vol. 184, no 7-8, pp. 980–994, 2012, ISSN: 0010-2202.
@article{Abian2012b,
title = {Effect of Recirculation Gases on Soot Formed from Ethylene Pyrolysis},
author = {María Abián and Ángela Millera and Rafael Bilbao and María U Alzueta},
url = {http://dx.doi.org/10.1080/00102202.2012.663990},
issn = {0010-2202},
year = {2012},
date = {2012-07-01},
journal = {Combustion Science and Technology},
volume = {184},
number = {7-8},
pages = {980--994},
publisher = {Taylor & Francis},
abstract = {Flue gas recirculation (FGR) is an effective technology both to control NOx emissions during combustion processes and to control temperature and make-up for the volume of the missing N2 during oxy-fuel combustion processes. In this article, a study of the individual role of the main products that are expected to form part of the recycled flue gas (CO, H2, H2O, and CO2) on soot and gas products formed during the thermal decomposition of ethylene-additive gas mixtures in the 975?1475 K temperature range is reported. Experimental results obtained in a quartz flow reactor are examined with the main objective of assessing the effectiveness of each gas additive in suppressing or boosting soot formation. Additionally, experimental data have been interpreted in terms of a literature detailed gas-phase kinetic model to analyze the evolution of gas products and get a better understanding of the gas-phase processes involving the thermal decomposition of the ethylene-additive gas mixtures, although soot formation reactions are not included in such mechanism. Flue gas recirculation (FGR) is an effective technology both to control NOx emissions during combustion processes and to control temperature and make-up for the volume of the missing N2 during oxy-fuel combustion processes. In this article, a study of the individual role of the main products that are expected to form part of the recycled flue gas (CO, H2, H2O, and CO2) on soot and gas products formed during the thermal decomposition of ethylene-additive gas mixtures in the 975?1475 K temperature range is reported. Experimental results obtained in a quartz flow reactor are examined with the main objective of assessing the effectiveness of each gas additive in suppressing or boosting soot formation. Additionally, experimental data have been interpreted in terms of a literature detailed gas-phase kinetic model to analyze the evolution of gas products and get a better understanding of the gas-phase processes involving the thermal decomposition of the ethylene-additive gas mixtures, although soot formation reactions are not included in such mechanism.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Flue gas recirculation (FGR) is an effective technology both to control NOx emissions during combustion processes and to control temperature and make-up for the volume of the missing N2 during oxy-fuel combustion processes. In this article, a study of the individual role of the main products that are expected to form part of the recycled flue gas (CO, H2, H2O, and CO2) on soot and gas products formed during the thermal decomposition of ethylene-additive gas mixtures in the 975?1475 K temperature range is reported. Experimental results obtained in a quartz flow reactor are examined with the main objective of assessing the effectiveness of each gas additive in suppressing or boosting soot formation. Additionally, experimental data have been interpreted in terms of a literature detailed gas-phase kinetic model to analyze the evolution of gas products and get a better understanding of the gas-phase processes involving the thermal decomposition of the ethylene-additive gas mixtures, although soot formation reactions are not included in such mechanism. Flue gas recirculation (FGR) is an effective technology both to control NOx emissions during combustion processes and to control temperature and make-up for the volume of the missing N2 during oxy-fuel combustion processes. In this article, a study of the individual role of the main products that are expected to form part of the recycled flue gas (CO, H2, H2O, and CO2) on soot and gas products formed during the thermal decomposition of ethylene-additive gas mixtures in the 975?1475 K temperature range is reported. Experimental results obtained in a quartz flow reactor are examined with the main objective of assessing the effectiveness of each gas additive in suppressing or boosting soot formation. Additionally, experimental data have been interpreted in terms of a literature detailed gas-phase kinetic model to analyze the evolution of gas products and get a better understanding of the gas-phase processes involving the thermal decomposition of the ethylene-additive gas mixtures, although soot formation reactions are not included in such mechanism.