Influence of ammonium nitrate on the crystallisation of ammonium sulfate

This study aims to explore the influence mechanism of ammonium nitrate produced by ozone denitrification on the crystallisation of ammonium sulfate, a by-product of ammonia desulfurisation. The laser method was used to study the influence of ammonium nitrate on the solubility and metastable zone width of ammonium sulfate. An experiment on the influence of ammonium nitrate on the particle size of ammonium sulfate was designed, and the influence mechanism was explored through scanning electron microscopy and X-ray diffraction. The findings showed that the addition of ammonium nitrate increased the size and aspect ratio of ammonium sulfate crystals. The addition of ammonium nitrate inhibited the dissolution of ammonium sulfate and widened its metastable zone. The addition of ammonium nitrate covered the active sites of crystal nucleus growth, which inhibited the formation of crystal nuclei to a certain extent, and crystal growth dominated the crystallisation process. Moreover, the addition of ammonium nitrate induced the preferred orientation of the specific crystal plane of ammonium sulfate, and the addition of a small concentration of ammonium nitrate decreased the crystallinity of ammonium sulfate. The research results can provide a reference for crystallisation optimisation and quality improvement of ammonium sulfate in the ammonia desulfurisation process.

Automated summary

This study aims to investigate the influence of ammonium nitrate produced by ozone denitrification on the crystallisation process of ammonium sulfate, a by-product of ammonia desulfurisation. The study used a laser method to examine the impact of ammonium nitrate on the solubility and metastable zone width of ammonium sulfate. Through scanning electron microscopy and X-ray diffraction, the study explored the influence mechanism and found that the addition of ammonium nitrate affected the size, aspect ratio, dissolution, and crystallinity of ammonium sulfate crystals. The findings provide valuable insights for optimizing the crystallisation process and improving the quality of ammonium sulfate in ammonia desulfurisation.