Oxidation kinetics of spent low-level radioactive resins

Y. J. Huang, H. Paul Wang, Chih C. Chao, H. H. Liu, M. C. Hsiao, S. H. Liu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Experimentally, two-stage oxidation of spent low-level radioactive resin was found by thermo-gravimetric analysis (TGA). About 24% of the spent resins was oxidized at 600 to 900 K. Online Fourier transform infrared spectra showed that the decomposition of the -SO3H species in the resin to SO 2 occurred at 670 and 1020 K. The numerical calculation from TGA weight loss data at different heating rates showed that the global activation energies for oxidation of the spent resins were 108 to 138 kJ·mol -1. The reaction orders for resin and oxygen were about 1.0 and 3.5, respectively. The global rate equations for oxidation of the resin in the first and second stages can be expressed as dx1/dt (s-1 ) = 2.3 × 107 (s-1)exp[-117900(J·mol -1)/T(K)][1 - x (%)]0.82 [O2 (vt%)] 3.5 (x denotes the reaction conversion) and dx2/dt = 8.4 × 1017exp(-239500/RT) (1 - x)0-9[O2] 4.5,respectively.

Original languageEnglish
Pages (from-to)355-360
Number of pages6
JournalNuclear Science and Engineering
Issue number3
Publication statusPublished - 2005 Nov

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering


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