Improvement of the Fe-NTA sulfur recovery system by the addition of a hydroxyl radical scavenger

Guoxiong Hua, Qingzhi Zhang, Derek McManus, Alexandra M. Z. Slawin, J. Derek Woollins

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The degradation of Nitrilotriacetic Acid (NTA), which results from the oxidation of hydroxyl radicals formed in the process, is a major deficiency in the present Fe-NTA system for the oxidation of hydrogen sulfide to sulfur by air. The degradation of NTA can be slowed down considerably by the addition of a hydroxyl radical scavenger. In this study, a series of inorganic and organic materials was tested as scavengers/inhibitors of hydroxyl radicals in attempts to improve the Fe-NTA system. The results showed that N-methylpyrrolidinone and ethylene glycol could be used as potentially powerful scavengers of hydroxyl radicals to improve the Fe-NTA system.

Original languageEnglish
Pages (from-to)181-198
Number of pages18
JournalPhosphorus, Sulfur, and Silicon and the Related Elements
Volume182
Issue number1
DOIs
Publication statusPublished - Jan 2007

Keywords

  • ethylene glycol
  • Fe-NTA system
  • N-methylpyrrolidinone
  • scavenger of hydroxyl radicals
  • IRON(III) COMPLEXES
  • ACID
  • FE(II)/FE(III)
  • OXIDATION
  • MELATONIN
  • LIGANDS
  • H2S

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