Hydrodechlorination of chlorinated organic wastes over pd supported mixed oxide catalysts

• Autores: Beteley Tekola Meshesha
• Directores de la Tesis: Francesc Medina Cabello (dir. tes.), Jesús Eduardo Sueiras Romero (dir. tes.), Ricardo José Chimentao (dir. tes.)
• Lectura: En la Universitat Rovira i Virgili ( España ) en 2011
• Idioma: inglés
• Tribunal Calificador de la Tesis: Bernard Coq (presid.), Anton Ivanov Dafinov (secret.), Francisco López Bonillo (voc.), Jordi Llorca Piqué (voc.), Karin Föttinger (voc.)
• Materias:
  • Química
    • Química inorgánica
      • Compuestos de cloro
  • Ciencias tecnológicas
    • Ingeniería y tecnología químicas
    • Ingeniería y tecnología del medio ambiente
      • Residuos industriales
      • Eliminación de residuos
• Enlaces
  • Tesis en acceso abierto en: TDX
• Resumen

  • Environmental pollution by polychlorinated chlorinated organic wastes is of great concern. Catalytic hydrodechlorination is considered clean and efficient methodology for safe disposal of chlorinated organic wastes. This work aims at studying the catalytic hydrodechlorination reaction for the removal of environmentally polluting chlorinated organic wastes: 1,2,4-trichlorobenzene (1,2,4-TCB) and Trichloroethylene (TCE). The research has focused on evaluation of the activity, selectivity and stability of newly synthesized Pd based catalysts for hydrodechlorination of 1,2,4-trichlorobenzene and trichloroethylene. The first part, related to the HDC of 1,2,4-TCB, is to obtain active and stable catalyst for the hydrodechlorination of C-Cl bond of aromatic compounds to non chlorinated organic aromatic compound (benzene). While the second part aims at obtaining catalysts that allow high selectivity to ethylene formation during the HDC Trichloroethylene. Pd based hydrotalcite derived mixed oxides with different surface property were explored as catalysts for hydrodechlorination reaction. In addition, bimetallic and monometallic heterogeneous catalytic systems were investigated for selective hydrodechlorination reaction. Detailed characterization of the active centers of the newly synthesized catalysts by different techniques was achieved. This work presents original ideas, which could find a practical application, for the treatment of organo-halogenated pollutants.