Person:
García Rodríguez, Juan

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First Name
Juan
Last Name
García Rodríguez
URI
https://hdl.handle.net/20.500.14352/76093
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Químicas
Department
Ingeniería Química y de Materiales
Area
Ingeniería Química
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    Project number: PIMCD405/23-24
    Dando a conocer la Ingeniería Química: del bachillerato a la Universidad… y vuelta!
    (2024) Martín Martínez, María; Águeda Maté, Vicente Ismael; Álvarez Torrellas, Silvia; Carbajo Olleros, Jaime; Delgado Dobladez, José Antonio; García Rodríguez, Juan; Larriba Martínez, Marcos; Calero Berrocal, Ruben; Cañada Barcala, Andres; Huber Benito, Diego; Martin Gutierrez, Diego; Pascual Muñoz, Gonzalo; Peinado Serrano, M. Cristina; Pinzolas Rubio, Alejandro; Portillo Sanchez, Eva; Rodriguez Llorente, Diego; Sanchez Quiñones, Carlos A. A.; Sanchez Fernandez, Ignacio
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    Degradation Kinetics of Bisphenol A by Catalytic Wet Oxidation with Ruthenium-Impregnated Carbon Nanosphere Catalysts
    (chemistry proceedings, 2022) Serra-Pérez, Estrella; Ovejero Escudero, Gabriel; García Rodríguez, Juan
    Different countries in Europe have proposed some restrictions about bisphenol A (BPA), considered an endocrine disruptor, for the production of food packing and toys for children, for example, Denmark, France, Sweden, Belgium, Austria and Norway. However, it is still being found in wastewater effluents. In this study, BPA was degraded by catalytic wet air oxidation employing ruthenium-impregnated carbon nanosphere catalysts (CNS). The catalyst was synthesized with a mixture of resorcinol and formaldehyde and later, a pyrolysis treatment was impregnated by 1, 2, 5, 7 and 10% of ruthenium and activated with hydrogen at 350 °C. The experimental installation was a batch Hastelloy high-pressure reactor of 100 mL of volume with an electrical jacket and a variable-speed magnetic drive. The concentration of BPA was followed by high-performance liquid chromatography. After the study of different experiment variables (temperature (110–150 °C), pressure (20–50 bar), initial concentration of BPA (5–30 mg L−1) and catalyst mass (50–300 mg)) in a batch reactor of 100 mL of volume, two different potential models (r = k CaBPA and r = k CaBPA Pb Cc Ru) were used for simulating the kinetic behavior of BPA from the adjustment of the experimental data obtained for CWAO reactions. It also tested different loads of ruthenium (1–10%) in BPA degradation. Both adjustments had a correlation factor of 0.98 and reproduced all the experiments well, being better than those ones with 20 mg L−1 of initial concentration of BPA. BPA degradation was above 97% at 90 min of reaction time from 2% of Ru in the catalyst.
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    Project number: 78
    Lab at home: prácticas de Ingeniería Química en tiempos de confinamiento
    (2021) Larriba Martínez, Marcos; Ovejero Escudero, Gabriel; García Rodríguez, Juan; Delgado Dobladez, José Antonio; Águeda Maté, Vicente Ismael; Curto Maldonado, Andrés; Serra Pérez, Estrella; Hernández Abreu, Ana Belén; Uribe Santos, Dora Lucía; Pascual Muñoz, Gonzalo; Rodríguez Llorente, Diego; Cañada Barcala, Andrés; Sanz Santos, Eva; Huaccallo Aguilar, Ysabel; Ruiz de León Gómez, Carlos; Cañas Jiménez, Javier
    En este proyecto de innovación docente se han desarrollado prácticas de laboratorio de dos asignaturas del Grado en Ingeniería Química, Ingeniería Térmica y Operaciones de Separación, para así garantizar la experimentalidad en situaciones de docencia no presencial empleando materiales cotidianos e instalaciones confeccionadas por impresión 3D, que podrán ser empleadas por los estudiantes en situación de confinamiento.
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    Efficient removal of antibiotic ciprofloxacin by catalytic wet air oxidation using sewage sludge-based catalysts: degradation mechanism by DFT studies
    (Journal of Environmental Chemical Engineering, 2023) Gutiérrez Sánchez, Pablo; Álvarez Torrellas, Silvia; Larriba Martínez, Marcos; Gil, María Victoria; Garrido Zoido, Juan Manuel; García Rodríguez, Juan
    In this work, the sewage sludge-derived activated carbon (SAC) loaded with iron nanoparticles (FeSAC) showed a highly effective catalytic activity in the degradation of the antibiotic ciprofloxacin by the CWAO reaction. The properties of FeSAC catalyst were studied by using N2 adsorption-desorption measurements at 77 K, scanning electron microscopy, X-ray fluorescence spectroscopy, X-ray photoelectron spectroscopy and thermogravimetric analysis. The CWAO reaction was evaluated at different temperatures (120–140 ºC), total pressure (10–30 bar) and catalyst doses (0.1–0.7 g/L) in a batch reactor. In this regard, temperature and catalyst dosage showed a significant impact on the removal of the tested antibiotic. By using a catalyst dose of 0.7 g/L, ciprofloxacin degradation and CO2 selectivity were higher than 99 % and 60 %, respectively, and were achieved within two hours at 140 °C and 20 bar. The loss of the active phase (Fe) of the catalyst in the reaction medium was measured, obtaining negligible values (less than 24 ppb). This catalyst showed high stability under the tested reaction conditions. In addition, a potential equation was proposed to correctly describe the evolution of ciprofloxacin degradation. The calculated activation energy of the CWAO process was 53.8 kJ/mol. Additionally, Density Functional Theory (DFT) calculations were performed to illustrate the degradation mechanism of ciprofloxacin, where the electronic energies indicated the compounds that are most difficult to degrade by CWAO. Finally, a proof of concept using an environmentally-relevant matrix was carried out, verifying the technical feasibility of the synthesized catalyst for its application with more complex matrices, consecutive reaction cycles and at a low treatment cost
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    Hacia la convergencia europea en las enseñanzas de ingeniería química: operaciones con sólidos en el campus virtual
    (II Jornada Campus Virtual UCM: cómo integrar investigación y docencia en el CV-UCM, 2005) Rodríguez Rodríguez, Araceli; Sotelo Sancho, José Luis; Gómez Martín, José María; García Rodríguez, Juan; Grupo de Catálisis y Operaciones de Separación (CyOS), Facultad de Ciencias Químicas - UCM; Fernández-Valmayor Crespo, Alfredo; Fernández-Pampillón Cesteros, Ana María; Merino Granizo, Jorge
    La asignatura optativa de tercer curso del Título de Ingeniero Químico «Operaciones con Sólidos» participa durante este curso académico en el grupo piloto de adaptación al Espacio Europeo de Educación Superior (EEES). Para el desarrollo de esta asignatura de acuerdo con las directrices de Convergencia Europea ha sido de gran ayuda el Campus Virtual, como apoyo a las clases presenciales, herramienta de evaluación continua, espacio de trabajo en grupos y de comunicación en la clase.
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    Insights of emerging contaminants removal in real water matrices by CWPO using a magnetic catalyst
    (Journal of Environmental Chemical Engineering, 2021) Huacallo Aguilar, Ysabel; Álvarez Torrellas, Silvia; Gil, Maria Victoria; Larriba Martínez, Marcos; García Rodríguez, Juan
    The study was focused on the application of catalytic wet peroxide oxidation (CWPO) with a synthesized magnetic catalyst (Fe3O4/MWCNTs) for the treatment of real water matrices spiked with pharmaceutical compounds. CWPO was carried out by modifying the initial pH of surface water (SW), wastewater treatment plant (WWTP) effluent, brewery wastewater (BW) and hospital wastewater (HW), and the effect of the addition of the emerging pollutants naproxen (NAP) and diclofenac (DCF). From the experimental results, pH and concentration of NAP and DCF in CWPO were crucial factors in the successful pollutants removal from water matrices. The lab-prepared catalyst showed high removal rates of NAP and DCF from different water matrices spiked with the NAP-DCF mixture at pH 5.0. The highest average removal rate of TOC (75%), NAP (66%), DCF (76%), TN (39%) and aromaticity (68.39%) was obtained for SW matrix using 1.0 g L−1 of catalyst, pH ≈ 5.0, 5 mM of H2O2 and 60 °C. The mineralization decreased with the increase of the initial TOC concentration of the tested matrix. By CWPO tests of the real water matrices it was demonstrated that DCF removal was higher than NAP. From the recyclability tests, the catalyst demonstrated high activity and stability along three consecutive CWPO cycles of 8 h each one. The pseudo-second order model well-described the degradation of NAP and DCF. Finally, aromaticity and toxicity of the effluents were greatly reduced after CWPO treatment. This work demonstrated that CWPO with the magnetic catalyst is an efficient method to remove DCF-NAP mixtures from real aqueous matrices
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    Influence of transition metal-based activating agent on the properties and catalytic activity of sewage sludge-derived catalysts. Insights on mechanism, DFT calculation and degradation pathways
    (Journal of Molecular Liquids, 2023) Gutiérrez Sánchez, Pablo; Álvarez Torrellas, Silvia; Larriba Martínez, Marcos; Gil, María Victoria; Garrido Zoido, Juan Manuel; García Rodríguez, Juan
    Research studies combining the detailed physicochemical properties' analysis, the catalytic activity in different real aqueous matrices, the proposal of degradation mechanisms and the stability of the intermediates/by-products by means of the Density-functional theory (DFT) are scarce. Therefore, this work gives a step forward in the field of circular economy and the removal of emerging pollutants such as the antibiotic ciprofloxacin, covering all the previously aspects mentioned, using four iron and nickel-based catalysts from two different sewage sludge. Experimental results revealed a significant influence of both the source of the sewage sludge and the activating agent used (iron chloride, nickel chloride and a mixture of both) on the physicochemical properties of the materials and, hence, on their catalytic activity. FTIR studies and chemical composition evidenced that the use of this biomass precursor leads to the generation of a wide variety of functional groups and heteroatoms in the synthesized catalyst structure. Moreover, they showed a combination of Type I-IV isotherms with H3-H4 type hysteresis loops, being mainly mesoporous materials and exhibiting a moderate microporosity except when nickel chloride was used solely as activating agent. The carbonaceous materials reached ciprofloxacin adsorption capacities in the range of 40.4–73.9 mg/g. The use of nickel chloride showed the lowest adsorption contribution and catalytic activity. The bimetallic catalyst (synthesized from a mixture of iron and nickel chloride) showed slightly higher catalytic activity than that found for the iron catalyst, but the metal leaching was also considerably higher. Consequently, the use of iron chloride solely as activating agent seems to be the better alternative, achieving a maximum ciprofloxacin removal around 99.7 % and an iron leaching concentration into the reaction medium of 0.48–0.61 mg/L. The main degradation pathways of ciprofloxacin were proposed according to the detection of LC-MS intermediates and DFT calculation, indicating the most likely areas of attack of reactive species on atoms with a high Fukui index (f0)
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    Project number: 171
    Aprende a emprender: del TFG en el Grado de Ingeniería Química al mercado laboral
    (2019) Águeda Mate, Vicente Ismael; Ovejero Escudero, Gabriel; Uguina Zamorano, María de los Ángeles; Delgado Dobladez, José Antonio; Álvarez Torrellas, Silvia; García Rodríguez, Juan; Larriba Martínez, Marcos; Sánchez Alonso, Jorge; Aranda López, Daniel; Hernández Abreu, Ana Belén; Serra Pérez, Estrella; Uribe Santos, Dora Lucía; Ruiz de León Gómez, Carlos; Huaccallo Aguilar, Ysabel; Garrido Escudero, Amalio; Villarroel Amoraga, María; Carretero Gómez, Silvia
    Se constituirá una Empresa de Ingeniería con un grupo de estudiantes del TFG del Grado en Ingeniería Química que diseñe una planta química. Diferentes agentes asesorarán en la búsqueda de financiación, diseminación y desarrollo de las actividades.
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    Project number: 264
    Cooperación entre Universidad y Empresa en el desarrollo del TFG en el Grado de Ingeniería Química
    (2018) Águeda Maté, Vicente Ismael; Álvarez Torrellas, Silvia; Delgado Dobladez, José Antonio; García Rodríguez, Juan; Ovejero Escudero, Gabriel; Uguina Zamorano, Mª Ángeles; Sánchez Alonso, Jorge; Aranda López, Daniel; Hernández Abreu, Ana Belén; Serra Pérez, Estrella
    Se ha constituido de modo ficticio una empresa de ingeniería con estudiantes del TFG en el Grado en Ingeniería Química, encargada de diseñar las distintas secciones de una planta industrial de producción de detergentes. El diseño de las distintas unidades de acuerdo con las directrices publicadas en la Guía Docente del TFG constituyen las memorias presentadas por el estudiante. Como formación complementaria se ha propuesto el diseño de páginas web, ya que hoy en día es la principal vía de información y publicidad. Se ha realizado un curso para emprendedores de la Cámara de Comercio de la Comunidad de Madrid. Además se han presentado las principales fuentes de financiación para poder constituir una empresa y desarrollar una actividad empresarial. Se han programado varias charlas y coloquio ofrecidas por profesionales de las empresas Maxam y Técnicas Reunidas, referentes en el sector químico y de la ingeniería. Se han establecido tutorías en grupo para realizar el seguimiento de los TFG. Además se ha planificado y realizado una visita guiada a planta de detergentes de CEPSA Química en Algeciras (Cádiz). Como formación específica para estudiantes de doctorado se ha asistido al 4º Congreso de Innovación Educativa en Ingeniería Química en Santander.
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    Project number: 208
    Practicando Ingeniería Química: Prácticas colaborativas de bajo coste para grupos numerosos
    () Larriba Martínez, Marcos; Ovejero Escudero, Gabriel; García Rodríguez, Juan; Delgado Dobladez, José Antonio; Águeda Maté, Vicente Ismael; Álvarez Torrellas, Silvia; Martín Martínez, María; Carbajo Olleros, Jaime; García Sánchez, Laura; Guerrero Moreno, Elisa; Aranda López, Daniel; Serra Pérez, Estrella; Pascual Muñoz, Gonzalo; Rodríguez Llorente, Diego; Cañada Barcala, Andrés; Sanz Santos, Eva; Gutiérrez Sánchez, Pablo; Calero Berrocal, Rubén; Sánchez Quiñones, Carlos Alberto Augusto; Cañas Jiménez, Javier; Huber Benito, Diego; Portillo Sánchez, Eva; Martín Gutiérrez, Diego; Suárez Rodríguez, Pablo; Sánchez Fernández, Ignacio
    Elaboración de un catálogo de prácticas de laboratorio de bajo coste para trabajar los fundamentos de ingeniería química con grupos numerosos, usando metodologías activas de aprendizaje para incrementar la motivación de los estudiantes.