KINETICS OF THE REDUCTION OF MNO2 WITH FE2+ IONS IN ACIDIC SOLUTIONS

Tekin, Taner; BAYRAMOĞLU, MAHMUT RAHİM

doi:10.1016/0304-386x(93)90053-g

Makale Tam Makale Uluslararası 1993

KINETICS OF THE REDUCTION OF MNO2 WITH FE2+ IONS IN ACIDIC SOLUTIONS

Taner Tekin, MAHMUT RAHİM BAYRAMOĞLU

Hydrometallurgy Cilt 32 · Sayı 1 · ss. 9–20 · 01.01.1993

DOI ile aç

Özet

The kinetics of the reduction of MnO2 by Fe2+ ions in H2SO4 solution were investigated under well-defined hydrodynamic conditions. The reaction was monitored potentiometrically using a saturated calomel electrode and a Pt electrode. The effect of stirring rate, particle size, temperature, Fe2+ and H+ concentrations were studied. Under high agitation, diffusional resistances are negligible and the rate is controlled by chemical reaction. Evidence supporting this conclusion is given. The kinetic data have been analysed using the ''shrinking core model'' equation. The rate was found to be proportional to [Fe2+]0.5.[H+]0.5 and the apparent activation energy was determined as 28 kJ/mol. The final rate equation is as follows: 1-(1-X)1/3=0.7 10(7)[Fe2+]0.5.[H+]0.5.exp(-28000/RT).t/rho.d0.

Atıf için künye

Tekin, T., & BAYRAMOĞLU, M. R. (1993). KINETICS OF THE REDUCTION OF MNO2 WITH FE2+ IONS IN ACIDIC SOLUTIONS. Hydrometallurgy, 32(1), 9–20. https://doi.org/10.1016/0304-386x%2893%2990053-g

BibTeX

@article{tekin1993-188569,
  author = {Tekin, Taner and BAYRAMOĞLU, MAHMUT RAHİM},
  title = {KINETICS OF THE REDUCTION OF MNO2 WITH FE2+ IONS IN ACIDIC SOLUTIONS},
  journal = {Hydrometallurgy},
  year = {1993},
  volume = {32},
  number = {1},
  pages = {9--20},
  issn = {0304-386X},
  doi = {10.1016/0304-386x(93)90053-g},
  url = {https://akademik.atauni.edu.tr/yayinlar/188569-kinetics-of-the-reduction-of-mno2-with-fe2-ions-in-acidic-solutions}
}