Aspectos cinéticos de la formación de arseniato férrico en lecho fijo mediante reacciones gas-sólido

Eduardo Balladares, Roberto Parra, Mario Sánchez

Resultado de la investigación: Contribución a una revistaArtículo

1 Cita (Scopus)

Resumen

The fixation of arsenic contained in gases produced during pyrometallurgical processes by using solid ferric oxide was studied in the range 873-1073 K under different oxygen potential and solid aggregates porosities. Arsenic fixation on solid iron oxides is described by the pore blocking model under the studied conditions. The solid product of the reaction has a molar volume 3 times larger than the solid reactant causing fast decreasing of the inter-granular spacing. The activation energies of arsenic fixation reaction are 34.96 and 35.46 kJ/mol for porosities of 0.88 and 0.74 respectively, and for porosity of 0.55 the activation energy was 26.88 kJ/mol. These values of activation energy show that intra-pellets diffusion has an effect only in samples with 0.55 porosity. Minor sintering of particles was detected. Industrial application of the concept demands a reaction system, which in is required better gas-solid contact for attaining larger conversions.

Título traducido de la contribuciónKinetic aspects on ferric arsenate formation in a fix bed gas-solid reaction system
Idioma originalEspañol
Páginas (desde-hasta)90-95
Número de páginas6
PublicaciónDYNA (Colombia)
Volumen82
N.º189
DOI
EstadoPublicada - 2015

Palabras clave

  • Arsenic fixation
  • Copper smelting
  • Flue dust
  • Gas treatment

Áreas temáticas de ASJC Scopus

  • Ingeniería (todo)

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