Articles producció científica> Enginyeria Química

Study of the catalytic wet air oxidation of p-hydroxybenzoic acid on a fresh ruthenium catalyst supported by different oxides

  • Dades identificatives

    Identificador: imarina:9332564
    Autors:
    Hammedi, TBensouilah, ROuakouak, ALlorca, JCabello, FMKsibi, Z
    Resum:
    The catalytic wet air oxidation (CWAO) of p-hydroxybenzoic acid (p-HBA) was conducted in a batch reactor at 140 degrees C, and at a total air pressure of 50 bar over Ru-based catalysts. Four materials were selected as supports - TiO2, CeO2-TiO2, ZrO2-TiO2, and La2O3-TiO2 - all of which had mesopores in their texture and pollutant adsorption capacities. The supports were prepared by the sol-gel method, and then impregnated with 3 wt% of Ru precursor. Such characterization techniques as N2-sorption, XRD, XPS, H2-TPR, NH3-TPD, TEM, and HAADF-STEM were used to analyze the different solids. The correlation between catalytic activities and physicochemical properties was discussed. A significant specific surface area (SBET), a large amount of surfaceactive oxygen, and Lewis acidity sites were observed on cerium-containing catalysts (Ru/CeTi). Fresh Ru catalysts containing cerium showed higher activity than Ru/TiO2, Ru/ZrTi, and Ru/LaTi catalysts. It is assumed that the acidic sites and surface oxygen trap the p-HBA molecule, thus increasing the catalytic properties of the Ru particles which interact with the surface oxygen through the cerium redox process (Ce3+/Ce4+). As the presence of cerium increases surface-active oxygen, it inhibits the deposition of carbon on the surface of the Ru catalyst. The pseudo-second order (PSO) model adequately described the kinetic data of the p-HBA oxidation reaction using Ru catalysts.
  • Altres:

    Autor segons l'article: Hammedi, T; Bensouilah, R; Ouakouak, A; Llorca, J; Cabello, FM; Ksibi, Z
    Departament: Enginyeria Química
    Autor/s de la URV: Medina Cabello, Francisco
    Paraules clau: Waste-water Tio2 Support effects Sol-gel processing Sol-gel Ru catalysts Reduction Phenol P-hydroxybenzoic acid Nox Model Degradation Cwao Acetic-acid
    Resum: The catalytic wet air oxidation (CWAO) of p-hydroxybenzoic acid (p-HBA) was conducted in a batch reactor at 140 degrees C, and at a total air pressure of 50 bar over Ru-based catalysts. Four materials were selected as supports - TiO2, CeO2-TiO2, ZrO2-TiO2, and La2O3-TiO2 - all of which had mesopores in their texture and pollutant adsorption capacities. The supports were prepared by the sol-gel method, and then impregnated with 3 wt% of Ru precursor. Such characterization techniques as N2-sorption, XRD, XPS, H2-TPR, NH3-TPD, TEM, and HAADF-STEM were used to analyze the different solids. The correlation between catalytic activities and physicochemical properties was discussed. A significant specific surface area (SBET), a large amount of surfaceactive oxygen, and Lewis acidity sites were observed on cerium-containing catalysts (Ru/CeTi). Fresh Ru catalysts containing cerium showed higher activity than Ru/TiO2, Ru/ZrTi, and Ru/LaTi catalysts. It is assumed that the acidic sites and surface oxygen trap the p-HBA molecule, thus increasing the catalytic properties of the Ru particles which interact with the surface oxygen through the cerium redox process (Ce3+/Ce4+). As the presence of cerium increases surface-active oxygen, it inhibits the deposition of carbon on the surface of the Ru catalyst. The pseudo-second order (PSO) model adequately described the kinetic data of the p-HBA oxidation reaction using Ru catalysts.
    Àrees temàtiques: Multidisciplinary sciences Multidisciplinary Medicina i Ciências biológicas ii Ciências biológicas i Biotecnología
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: francesc.medina@urv.cat
    Identificador de l'autor: 0000-0002-3111-1542
    Data d'alta del registre: 2024-08-03
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.sciencedirect.com/science/article/pii/S2405844023080830
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referència a l'article segons font original: Heliyon. 9 (10):
    Referència de l'ítem segons les normes APA: Hammedi, T; Bensouilah, R; Ouakouak, A; Llorca, J; Cabello, FM; Ksibi, Z (2023). Study of the catalytic wet air oxidation of p-hydroxybenzoic acid on a fresh ruthenium catalyst supported by different oxides. Heliyon, 9(10), -. DOI: 10.1016/j.heliyon.2023.e20875
    DOI de l'article: 10.1016/j.heliyon.2023.e20875
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2023
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Multidisciplinary,Multidisciplinary Sciences
    Waste-water
    Tio2
    Support effects
    Sol-gel processing
    Sol-gel
    Ru catalysts
    Reduction
    Phenol
    P-hydroxybenzoic acid
    Nox
    Model
    Degradation
    Cwao
    Acetic-acid
    Multidisciplinary sciences
    Multidisciplinary
    Medicina i
    Ciências biológicas ii
    Ciências biológicas i
    Biotecnología
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