Catalytic denitration of drinking water: use of hydrotalcite-derived and activated carbon based catalysts

• Autores: Adriana Aristizábal Castrillón
• Directores de la Tesis: Sandra Contreras Iglesias (dir. tes.), Francesc Medina Cabello (codir. tes.)
• Lectura: En la Universitat Rovira i Virgili ( España ) en 2012
• Idioma: español
• Tribunal Calificador de la Tesis: Didier Tichit (presid.), Orlando José Gonzaléz Bello (secret.), Jordi Llorca Piqué (voc.)
• Materias:
  • Física
    • Química física
      • Catálisis
    • Física del estado sólido
  • Ciencias de la tierra y del espacio
    • Hidrología
      • Aguas subterráneas
  • Ciencias tecnológicas
    • Ingeniería y tecnología químicas
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• Resumen

  • High nitrate concentrations in groundwater is an environmental problem that limits the direct use of these resources for human consumption. The catalytic reduction of nitrates is a promising technology that transforms nitrate into N2 using without waste generation, using a catalyst. However, a high N2 selectivity (100%) is mandatory for large scales applications. In line with this strict requirement, the aim of this thesis is to study the effect of the surface metal chemistry in the activity and selectivity of catalysts supported on activated carbon (AC) and hydrotalcite-derived materials (CuM(II)Al) in the catalytic reduction of nitrates in water, using a continuous reactor. The effect of the Pt metal loading, the co-bivalent metal ion, the Cu/Zn ratio, the Cu-Pt alloy, the metal precursor and the Pt/Ag ratio are discussed in terms of the catalyst characterization for Pt/CuM(II)Al and Pt-Ag/AC catalysts.