Teléfono: +34 974 292 649
Email: joanjoma@unizar.es
Address: Escuela Politécnica Superior Crta de Cuarte, s/n. E-22071 Huesca – Spain
ABOUT ME h5>
Research Interests
My research interests lie primarily in producing biomass-derived carbon materials through thermochemical conversion processes. These renewable-based carbons, which can replace the currently dominant fossil fuel-intensive materials, and then drive innovative and sustainable technologies with circular economy practices.
I began my research career by working on thermochemical conversion of biomass, with a special focus on the behaviour and kinetics of biomass pyrolysis and gasification. In the last years, however, I directed my research activity towards the production of biomass-derived chars for biochar (i.e., char added to soil) and other value-added applications. Since the economic feasibility of large-scale biochar production systems is still unclear (the potential agronomic and environmental benefits of biochar in terms of profit are difficult to quantify), developing biochar-derived engineered carbons for alternative uses other than soil amendment can significantly increase the value chain of the whole system, as well as generate new technologies for biomass upcycling. Among the potential uses of biochar-derived carbons, I particularly centred my attention on three research topics: adsorption in gas phase (e.g., CO2 adsorption in postcombustion conditions), heterogeneous catalysis (e.g., ex situ pyrolysis vapours upgrading), and carbon-based electrodes for energy storage applications (e.g., post-lithium Na- and K-ion batteries).
PUBLICATIONS h5>
2011
Manyà, Joan Josep; Antal, Michael Jerry; Kinoshita, Christopher K; Masutani, Stephen M
Specific heat capacity of pure water at 4.0 mpa between 298.15 and 465.65 k Artículo de revista
En: Industrial and Engineering Chemistry Research, vol. 50, no 10, pp. 6470–6484, 2011, ISSN: 08885885.
@article{Manya2011,
title = {Specific heat capacity of pure water at 4.0 mpa between 298.15 and 465.65 k},
author = {Joan Josep Manyà and Michael Jerry Antal and Christopher K Kinoshita and Stephen M Masutani},
url = {https://pubs.acs.org/sharingguidelines},
doi = {10.1021/ie102462g},
issn = {08885885},
year = {2011},
date = {2011-05-01},
journal = {Industrial and Engineering Chemistry Research},
volume = {50},
number = {10},
pages = {6470--6484},
publisher = {American Chemical Society},
abstract = {The present work reports experimental results concerning the specific isobaric heat capacity of pure water at elevated pressure. Experiments were performed using a Tian-Calvet differential scanning calorimeter (Setaram Model BT2.15), at temperatures ranging from 298.15 to 465.65 K and at a constant pressure of 4.0 MPa. The aim of this study is to compare the new experimental results with values predicted by the IAPWS-95 formulation, which is generally accepted as reliable by the scientific community despite the fact that, in this formulation, nearly all the data for the isobaric heat capacity of water are based on measurements of Sirotas group in the former Soviet Union in the period from 1956 to 1970. The present calorimetric results for the specific heat capacity of pure water were found to be substantially in disagreement with the values obtained using the IAPWS-95 formulation, especially at high temperatures, where the differences are greater than 20%. Additional studies are therefore warranted in order to confirm this discrepancy. textcopyright 2011 American Chemical Society.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The present work reports experimental results concerning the specific isobaric heat capacity of pure water at elevated pressure. Experiments were performed using a Tian-Calvet differential scanning calorimeter (Setaram Model BT2.15), at temperatures ranging from 298.15 to 465.65 K and at a constant pressure of 4.0 MPa. The aim of this study is to compare the new experimental results with values predicted by the IAPWS-95 formulation, which is generally accepted as reliable by the scientific community despite the fact that, in this formulation, nearly all the data for the isobaric heat capacity of water are based on measurements of Sirotas group in the former Soviet Union in the period from 1956 to 1970. The present calorimetric results for the specific heat capacity of pure water were found to be substantially in disagreement with the values obtained using the IAPWS-95 formulation, especially at high temperatures, where the differences are greater than 20%. Additional studies are therefore warranted in order to confirm this discrepancy. textcopyright 2011 American Chemical Society.
2009
Manyà, Joan Josep; Antal, Michael Jerry
Review of the apparent molar heat capacities of NaCl(aq), HCl(aq), and NaOH(aq) and their representation using the pitzer model at temperatures from (298.15 to 493.15) K Artículo de revista
En: vol. 54, no 8, pp. 2158–2169, 2009, ISSN: 00219568.
@article{Manya2009,
title = {Review of the apparent molar heat capacities of NaCl(aq), HCl(aq), and NaOH(aq) and their representation using the pitzer model at temperatures from (298.15 to 493.15) K},
author = {Joan Josep Manyà and Michael Jerry Antal},
url = {https://pubs.acs.org/doi/full/10.1021/je8009946},
doi = {10.1021/je8009946},
issn = {00219568},
year = {2009},
date = {2009-08-01},
booktitle = {Journal of Chemical and Engineering Data},
volume = {54},
number = {8},
pages = {2158--2169},
publisher = {American Chemical Society},
abstract = {In this study, a new estimation of the standard state partial molar heat capacity (Cp0) of three binary systems [NaCl(aq), HCl(aq), and NaOH(aq)] for temperatures ranging from (298.15 to 493.15) K is performed. From experimental data (available in the literature to date) corresponding to the apparent molar heat capacities of the above-mentioned electrolytes, a procedure based on the assumption of Pitzer's ion interaction model was applied to calculate these important Cp0 values at a given temperature. Results obtained for each electrolyte (or ion) were correlated as functions of temperature by commonly used polynomial equations. Use of the hydrogen ion convention enabled estimates of the temperature-dependent values of Cp 0 of the individual ions Na+(aq), Cl-(aq), and OH-(aq). When used to calculate the temperature-dependent values of the Gibbs free energy of formation of OH-(aq), the formula for Cp0(T) of OH-(aq) given herein provides good agreement with values derived from independent measurements of the ion constant of water at elevated temperatures. In the specific case of NaCl, a considerable disagreement was observed between the estimations performed using Archer's model (Archer, D. G. J. Phys. Chem. Ref. Data 1992, 793-829) and some experimental data published years later. This fact can be explained, among other factors, by the dependence of the model parameters on the experimental uncertainty and systematic errors, which can be incurred during calorimetric experiments. For this reason, continuous revisions and updating of the proposed correlations are required when new experimental data become available. textcopyright 2009 American Chemical Society.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In this study, a new estimation of the standard state partial molar heat capacity (Cp0) of three binary systems [NaCl(aq), HCl(aq), and NaOH(aq)] for temperatures ranging from (298.15 to 493.15) K is performed. From experimental data (available in the literature to date) corresponding to the apparent molar heat capacities of the above-mentioned electrolytes, a procedure based on the assumption of Pitzer’s ion interaction model was applied to calculate these important Cp0 values at a given temperature. Results obtained for each electrolyte (or ion) were correlated as functions of temperature by commonly used polynomial equations. Use of the hydrogen ion convention enabled estimates of the temperature-dependent values of Cp 0 of the individual ions Na+(aq), Cl-(aq), and OH-(aq). When used to calculate the temperature-dependent values of the Gibbs free energy of formation of OH-(aq), the formula for Cp0(T) of OH-(aq) given herein provides good agreement with values derived from independent measurements of the ion constant of water at elevated temperatures. In the specific case of NaCl, a considerable disagreement was observed between the estimations performed using Archer’s model (Archer, D. G. J. Phys. Chem. Ref. Data 1992, 793-829) and some experimental data published years later. This fact can be explained, among other factors, by the dependence of the model parameters on the experimental uncertainty and systematic errors, which can be incurred during calorimetric experiments. For this reason, continuous revisions and updating of the proposed correlations are required when new experimental data become available. textcopyright 2009 American Chemical Society.
Aznar, María; Anselmo, Marta San; Manyà, Joan Josep; Murillo, María Benita
Experimental study examining the evolution of nitrogen compounds during the gasification of dried sewage sludge Artículo de revista
En: Energy and Fuels, vol. 23, no 6, pp. 3236–3245, 2009, ISSN: 08870624.
@article{Aznar2009,
title = {Experimental study examining the evolution of nitrogen compounds during the gasification of dried sewage sludge},
author = {María Aznar and Marta San Anselmo and Joan Josep Manyà and María Benita Murillo},
url = {https://pubs.acs.org/sharingguidelines},
doi = {10.1021/ef801108s},
issn = {08870624},
year = {2009},
date = {2009-06-01},
journal = {Energy and Fuels},
volume = {23},
number = {6},
pages = {3236--3245},
publisher = {American Chemical Society},
abstract = {Gasification of dried sewage sludge, which contains a high percentage of nitrogen, was experimentally studied to determine the effects of some operational parameters, such as freeboard temperature and equivalence ratio, on the partitioning of the fuel nitrogen among nitrogenous species. Experiments were performed using a bench-scale fluidized-bed gasifier and according to a well-specified procedure implemented to recover and quantify the nitrogen compounds. A mixture of argon and oxygen in similar proportions to air was used as a gasification agent in order to correctly quantify the N2 produced in the gasification process in an experimental way. Important findings of this research include the following: applying the analytical procedure developed in this work, a reasonably good inventory of nitrogen in the gasification products was obtained (mass balance closures near to 100%); most of the nitrogen goes to form gaseous products, N2 being the main gaseous nitrogen-containing product obtained; concentrations of N2, NH3, and N-tar in the producer gas strongly depend on the freeboard temperature, an increase of which causes an important decrease of both NH 3 and N-tar contents and a substantial increase of the N2 amount. textcopyright 2009 American Chemical Society.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Gasification of dried sewage sludge, which contains a high percentage of nitrogen, was experimentally studied to determine the effects of some operational parameters, such as freeboard temperature and equivalence ratio, on the partitioning of the fuel nitrogen among nitrogenous species. Experiments were performed using a bench-scale fluidized-bed gasifier and according to a well-specified procedure implemented to recover and quantify the nitrogen compounds. A mixture of argon and oxygen in similar proportions to air was used as a gasification agent in order to correctly quantify the N2 produced in the gasification process in an experimental way. Important findings of this research include the following: applying the analytical procedure developed in this work, a reasonably good inventory of nitrogen in the gasification products was obtained (mass balance closures near to 100%); most of the nitrogen goes to form gaseous products, N2 being the main gaseous nitrogen-containing product obtained; concentrations of N2, NH3, and N-tar in the producer gas strongly depend on the freeboard temperature, an increase of which causes an important decrease of both NH 3 and N-tar contents and a substantial increase of the N2 amount. textcopyright 2009 American Chemical Society.
2008
Aznar, María; Manyà, Joan Josep; García, Gorka; Sánchez, José Luis; Murillo, María Benita
Influence of freeboard temperature, fluidization velocity, and particle size on tar production and composition during the air gasification of sewage sludge Artículo de revista
En: Energy and Fuels, vol. 22, no 4, pp. 2840–2850, 2008, ISSN: 08870624.
@article{Aznar2008,
title = {Influence of freeboard temperature, fluidization velocity, and particle size on tar production and composition during the air gasification of sewage sludge},
author = {María Aznar and Joan Josep Manyà and Gorka García and José Luis Sánchez and María Benita Murillo},
url = {https://pubs.acs.org/sharingguidelines},
doi = {10.1021/ef800017u},
issn = {08870624},
year = {2008},
date = {2008-07-01},
journal = {Energy and Fuels},
volume = {22},
number = {4},
pages = {2840--2850},
publisher = {American Chemical Society},
abstract = {The influence of freeboard temperature, fluidization velocity, and particle size on tar production and composition during the air gasification of dried sewage sludge has been researched using a bench-scale gasifier. Of the operating variables analyzed, the results obtained from a statistical analysis (ANOVA and PCA) indicate that only the freeboard temperature has a significant influence on tar production. The results also show that freeboard temperature is the key factor that influences the tar composition. A high freeboard temperature reduces the amount of tar produced, but the tar compounds obtained are mainly PAH, which could require a more complicated secondary treatment for tar removal. Nevertheless, an increase in the freeboard temperature value implies a substantial increase in both low heating value and cold gas efficiency (6.5% and 10.8%, respectively, when the required freeboard temperature was increased from 873 to 1123 K). Future studies should focus on testing/developing catalytic materials able to degrade (in a secondary treatment) tar with a high content of PAH compounds. textcopyright 2008 American Chemical Society.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The influence of freeboard temperature, fluidization velocity, and particle size on tar production and composition during the air gasification of dried sewage sludge has been researched using a bench-scale gasifier. Of the operating variables analyzed, the results obtained from a statistical analysis (ANOVA and PCA) indicate that only the freeboard temperature has a significant influence on tar production. The results also show that freeboard temperature is the key factor that influences the tar composition. A high freeboard temperature reduces the amount of tar produced, but the tar compounds obtained are mainly PAH, which could require a more complicated secondary treatment for tar removal. Nevertheless, an increase in the freeboard temperature value implies a substantial increase in both low heating value and cold gas efficiency (6.5% and 10.8%, respectively, when the required freeboard temperature was increased from 873 to 1123 K). Future studies should focus on testing/developing catalytic materials able to degrade (in a secondary treatment) tar with a high content of PAH compounds. textcopyright 2008 American Chemical Society.
Manyà, Joan Josep; Arauzo, Jesús
An alternative kinetic approach to describe the isothermal pyrolysis of micro-particles of sugar cane bagasse Artículo de revista
En: Chemical Engineering Journal, vol. 139, no 3, pp. 549–561, 2008, ISSN: 13858947.
@article{Manya2008,
title = {An alternative kinetic approach to describe the isothermal pyrolysis of micro-particles of sugar cane bagasse},
author = {Joan Josep Manyà and Jesús Arauzo},
doi = {10.1016/j.cej.2007.09.005},
issn = {13858947},
year = {2008},
date = {2008-06-01},
journal = {Chemical Engineering Journal},
volume = {139},
number = {3},
pages = {549--561},
publisher = {Elsevier},
abstract = {A new kinetic approach is presented for modeling micro-particle pyrolysis of sugar cane bagasse for isothermal conditions. The model is based on a superimposition of kinetics pseudo-components which are based on single-step reactions to model primary pyrolysis. To ensure the validity and reliability of the kinetic parameters, the operating conditions must guarantee the minimisation of heat transfer intrusions and vapour-solid interactions. The kinetic model was previously deduced from thermogravimetric data obtained at 20 K min-1 for the same bagasse samples. The potential effects related to an increase of the heating rate and the mineral matter content were taken into account during the adjustment of the parameters to reproduce the isothermal experiments. A generalised kinetic model proposed by Miller and Bellan [R.S. Miller, J. Bellan, A generalised biomass pyrolysis model based on superimposed cellulose, hemicellulose and lignin kinetics, Combust. Sci. Technol. 126 (1997) 97-137] was selected to compare the degree of agreement between the two models. In spite of the effectiveness of the Miller and Bellan model, a slightly better performance was achieved for the model proposed in this work. The methodology followed in the present study for sugar cane bagasse samples could be useful to predict the isothermal pyrolysis behaviour of arbitrary biomass feedstocks in a relatively easy way. textcopyright 2007 Elsevier B.V. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A new kinetic approach is presented for modeling micro-particle pyrolysis of sugar cane bagasse for isothermal conditions. The model is based on a superimposition of kinetics pseudo-components which are based on single-step reactions to model primary pyrolysis. To ensure the validity and reliability of the kinetic parameters, the operating conditions must guarantee the minimisation of heat transfer intrusions and vapour-solid interactions. The kinetic model was previously deduced from thermogravimetric data obtained at 20 K min-1 for the same bagasse samples. The potential effects related to an increase of the heating rate and the mineral matter content were taken into account during the adjustment of the parameters to reproduce the isothermal experiments. A generalised kinetic model proposed by Miller and Bellan [R.S. Miller, J. Bellan, A generalised biomass pyrolysis model based on superimposed cellulose, hemicellulose and lignin kinetics, Combust. Sci. Technol. 126 (1997) 97-137] was selected to compare the degree of agreement between the two models. In spite of the effectiveness of the Miller and Bellan model, a slightly better performance was achieved for the model proposed in this work. The methodology followed in the present study for sugar cane bagasse samples could be useful to predict the isothermal pyrolysis behaviour of arbitrary biomass feedstocks in a relatively easy way. textcopyright 2007 Elsevier B.V. All rights reserved.