Liquid-phase catalytic hydrodechlorination of perchloroethylene

Authors

  • Alba Nelly Ardila-Arias Universidad de Antioquia
  • Gustavo Fuentes Zurita UAM-Iztapalapa
  • Miguel Ángel Martínez UAM-Iztapalapa
  • Consuelo Montes de Correa Universidad de Antioquia

Keywords:

catalytic hydrodechlorination, perchloroethylene, pure hydrogen, isopropanol, formic acid, palladium, titania, sol-gel, sodium hydroxide

Abstract


The reactivity of pure hydrogen, isopropanol and formic acid as reducing agents was assessed for the liquid-phase perchloroethylene (PCE) hydrodechlorination (HDC) over 0.8% Pd/TiO2 sol-gel under mild reaction conditions. Additionally, the effect of the amount of water and sodium hydroxide added into the reaction mixture were studied. Fresh and used catalysts were characterized by AAS, H2-chemisorption, N2 adsorption-desorption, DRX, H2-TPR, TGA-DTG, UV-Vis DRS, NH3-TPD and TEM. Best results were obtained with hydrogen and isopropanol as reductants. The addition of NaOH signifi cantly increases the conversion of PCE with the above reducing agents. However, an excess of NaOH negatively affects the HDC reaction. Characterization of fresh and used catalysts reveals certain changes, such as: surface area and Pd dispersion decrease, increased superfi cial acidity and Pd particle size. However, some characteristics like Pd loading, TiO2 crystalline structure and Pd oxidation state remained.

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Author Biographies

Alba Nelly Ardila-Arias, Universidad de Antioquia

Grupo Catálisis Ambiental

Gustavo Fuentes Zurita, UAM-Iztapalapa

Departamento de Ingeniería de Procesos e Hidráulica

Miguel Ángel Martínez, UAM-Iztapalapa

Departamento de Ingeniería de Procesos e Hidráulica

Consuelo Montes de Correa, Universidad de Antioquia

Grupo Catálisis Ambiental

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Published

2014-03-19

How to Cite

Ardila-Arias, A. N., Fuentes Zurita, G., Martínez, M. Ángel, & Montes de Correa, C. . (2014). Liquid-phase catalytic hydrodechlorination of perchloroethylene. Revista Facultad De Ingeniería Universidad De Antioquia, (42), 132–147. Retrieved from https://revistas.udea.edu.co/index.php/ingenieria/article/view/18926

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