Prof. Dr. Francisco Heras
Department of Chemical Engineering, Faculty of Sciences, Universidad Autónoma de Madrid (UAM), Cantoblanco, 28049 Madrid, Spain
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Academic Career Length
15Years (2012-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications30 October 2023 in Chemical Engineering Journal
Journal Article
JJJéssica Justicia
Jéssica Justicia
JBJosé Alberto Baeza
José Alberto Baeza
UMUniversidad Autónoma de Madrid
Universidad Autónoma de MadridFrancisco HerasMGMiguel A. Gilarranz
Miguel A. Gilarranz
16 September 2022 in Renewable Energy
Journal Article
JJJéssica Justicia
Jéssica Justicia
JBJosé Alberto Baeza
José Alberto Baeza
AOAdriana S. de Oliveira
Adriana S. de Oliveira
LCLuisa Calvo
Luisa Calvo
Francisco HerasMGMiguel A. Gilarranz
Miguel A. Gilarranz
20 January 2012 in Industrial & Engineering Chemistry Research
Journal Article
Francisco HerasNANoelia Alonso-Morales
Noelia Alonso-MoralesDJDiana Jimenez-Cordero
Diana Jimenez-CorderoMGMiguel A. Gilarranz
Miguel A. GilarranzJRJuan J. Rodriguez
Juan J. RodriguezActivation upon cyclic oxygen chemisorption–desorption has proved to be an efficient way to develop porosity at low burn off from waste tires char. In this work the influence of particle size, desorption temperature, and the number of cycles is studied. Highest values of burnoff and specific surface area (SBET) are obtained for the largest particle diameter (3 mm average) and at intermediate desorption temperature (650 °C). In these conditions SBET values around 500 m2/g can be achieved at burn-offs of about 30%, and close to 600 m2/g at around 45% burnoff, with a mean pore size of 10 nm and a micropore volume close to 0.08 cm3/g. Although the surface area is moderate, the low burnoff and high SBET/burnoff ratio achieved make it possible to maintain initial granular morphology of the particles even after 20 cycles of activation.
14 March 2024 in Bioresource Technology
Journal Article
Francisco HerasJJJéssica Justicia
Jéssica Justicia
JBJosé A. Baeza
José A. Baeza
MGMiguel A. Gilarranz
Miguel A. Gilarranz
VFVíctor R. Ferro
Víctor R. Ferro
Aqueous phase reforming has been explored for renewable H2 production from waste biomass. Promising results have been reported for pyrolysis bio-oil aqueous fractions (AFB), but economical assessments are needed to determine process feasibility, which requires both energy consumption minimization and optimal H2 valorization. This work compares different alternatives using process simulation and economic evaluation computational tools. Experimental results and a specific thermodynamic model are used to set mass balances. An adequate heat integration allows to reduce the process energy demand, covering the 100 % of the reactor duty. Optimal H2 unit cost is achieved if part of the produced H2 is valorized for energy self-covering and the rest is commercialized. Renewable H2 net production of c.a. 3.3 kgH2/m3 of treated AFB at a preliminary 1-2 €/kg unit cost is estimated, which can be considered as competitive with green H2, even though a case of diluted AFB is considered.
18 March 2024 in International Journal of Hydrogen Energy
Journal Article
MTM. Torres
M. TorresJJJ. Justicia
J. Justicia
JBJ.A. Baeza
J.A. Baeza
LCL. Calvo
L. Calvo
Francisco HerasMGM.A. Gilarranz
M.A. Gilarranz
Journal Article
Francisco HerasAOAdriana S. de Oliveira
Adriana S. de OliveiraJBJosé A. Baeza
José A. BaezaUMUniversidad Autónoma de Madrid
Universidad Autónoma de MadridVFVictor Ferro
Victor FerroMGMiguel A. Gilarranz
Miguel A. GilarranzAqueous-phase reforming has been revealed as a novel, interesting and efficient process for the treatment of wastewater containing organic pollutants. However, due to the relatively severe operating conditions (above 15 bar and 200 °C), this process could become economically competitive if any solution for energy or material valorization is implemented. Most research has been devoted to direct the process to H2 production as an alternative to reach economic sustainability, but the results obtained were not competitive in the current market of hydrogen and syngas. In this work, a preliminary simulation study (using Aspen HYSYS software) of the process heat balance in different conditions was implemented to induce a heat integration that would allow the auto-sustainability of the process, even generating in some cases an excess of energy that could constitute an opportunity for a positive economic balance. The results showed that this approach would only be possible by maximizing the methane production to the detriment of hydrogen production.
About Me
Francisco Heras, PhD, is Ass. Professor at the Dpt. of Chemical Engineering of Universidad Autónoma de Madrid (Spain). He has participated in thirteen research projects funded through competitive public calls (including two collaborative networks between groups) as PI in two of them. He have authored 40 scientific papers in indexed journals placed in Q1 (86%) and D1 (66%) and 59 contributions in national and international conferences. His h-index is 20. He has supervised three Doctoral Theses and one more currently in progress, focused on the treatment and valorization to hydrogen of waste biomasses from different industries, and sixty Bachelor and Master Theses. His former research was focused on valorization of waste streams from stainless steel industry, gas phase hydrodechlorination and preparation of advanced carbon materials and their use as adsorbents, catalytic supports and electrodes for superconductors. Currently, his research is devoted to the development of aqueous phase reforming process for the valorization of different biomasses to bio-hydrogen through the combination of experimental and simulation contributions to explore viable and scalable applications in the context of sustainable production and circular economy. He is a member of the Editorial Board and Guest Editor of several special issues for the Applied Sciences and Biomass journals, and a member of the Editorial Board of the Spanish Carbon Group Newsletter.