Effects of sodium bromide and sodium iodide on the thermal decomposition characteristics of nitrification wastes

Heng Zao Yang, Juan Zhai, Jun Cheng Jiang, An Chi Huang

Research output: Contribution to journalArticlepeer-review

Abstract

The handling of nitrification waste (NW) presents considerable safety risks due to its propensity for thermal runaway. This study investigates the influence of sodium bromide (NaBr) and sodium iodide (NaI) on the thermal breakdown properties of NW. The thermal stability and apparent activation energy (Ea) were examined using differential scanning calorimetry and thermogravimetric analyzer. The results demonstrate that the inclusion of NaBr and NaI modifies the thermal breakdown characteristics of NW. NaBr effectively decreases the Ea from 246.6 to 78.6 kJ mol−1 and enhances the onset temperature (To) from 141.0 to 107.7 °C during the initial decomposition stage. However, NaI reduces the Ea to 154.49 kJ mol−1 while having a negligible effect on the To. The findings indicate that the thermal behavior of NW can be altered by NaBr and NaI, providing valuable information for the development of safer handling and treatment methods. This study offers useful data for the advancement of enhanced safety standards in the management of NW.

Original languageEnglish
JournalJournal of Thermal Analysis and Calorimetry
DOIs
StateAccepted/In press - 2024

Keywords

  • Apparent activation energy
  • Differential scanning calorimetry
  • Thermal behavior
  • Thermal stability
  • Thermogravimetric analyzer

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