Experimental study on desulfurization performance of Fly ash slurry

Yongqi Lu, Xiaohong Yao, Jiming Hao, Jin Xu, Cheng Chang

Research output: Contribution to journalArticlepeer-review


The orthogonal experiment was designed first to study the leaching of Fe ion in coalfired fly ash solution. The pH value was found to be detrimental, and Fe3+ concentration in leachate could reach about 30mg/L in the low limit of pH. Then, the another lab experimental was conducted to investigate the SO2 absorption with Fe3+ solution and fly ash acid leachate, proving the reaction mechanism of transition metal catalyzed oxidation of SO2. From the experiment, the maximum enhancement of absorption arose within the pH ranges of 2. 0-3. 0 for the solution and leachate. In sequence, an on-site test of treat flue gas from a 4 t/h space heating boiler was put forward, in which the slurry of fly ash captured from flue gas was served as absorbent. The results showed a medium-order efficiency of SO 2 removal could be attained with this system.

Original languageEnglish (US)
JournalHuanjing Kexue/Environmental Science
Issue number1
StatePublished - Dec 1 1999
Externally publishedYes


  • Atmospheric chemistry
  • Catalyzed oxidation
  • Desulfurization
  • Fe
  • Fly ash
  • Leachate
  • Site test

ASJC Scopus subject areas

  • Environmental Science(all)


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