江汉大学学报(自然科学版) ›› 2022, Vol. 50 ›› Issue (2): 23-31.doi: 10.16389/j.cnki.cn42-1737/n.2022.02.003

• 化学工程 • 上一篇    下一篇

脱硫液组成对EDTA-Fe稳定性和选择性的影响

黄佩武1,徐勋达2,潘威2,余国贤*1   

  1. 1. 江汉大学 光电材料与技术学院,湖北 武汉 430056;2. 武汉国力通能源环保股份有限公司,湖北 武汉 430206
  • 发布日期:2022-03-28
  • 通讯作者: 余国贤
  • 作者简介:黄佩武(1996— ),男,硕士生,研究方向:气体催化净化。

Effect of Desulfurization Solution Composition on Stability and Selectivity of EDTA-Fe

HUANG Peiwu1,XU Xunda2,PAN Wei2,YU Guoxian*1   

  1. 1. School of Optoelectronic Materials & Technology,Jianghan University,Wuhan 430056,Hubei,China;2. Wuhan Guolitong Energy and Environmental Protection Co. ,Ltd. ,Wuhan 430206,Hubei,China
  • Published:2022-03-28
  • Contact: YU Guoxian

摘要: 以EDTA-Fe 为气相硫化氢脱除络合铁催化剂,建立脱硫体系模型。实验考察了脱硫液中碱度、EDTA/Fe 摩尔比、总铁浓度、硫代硫酸根浓度对EDTA-Fe 催化剂稳定性及脱硫选择性的影响。实验结果表明:脱硫液中碱度值的增加降低了EDTA 的降解率,降低了脱硫选择性;EDTA/Fe 摩尔比的增加导致EDTA 降解率增加,脱硫选择性降低;总铁浓度增加,导致EDTA 降解率增加,脱硫选择性降低;硫代硫酸根浓度的增加显著降低EDTA 的降解率,增加脱硫选择性。综合考虑EDTA 的降解率和脱硫选择性时,应尽量降低脱硫液组成中的EDTA/Fe的摩尔比、总铁浓度,适当增加脱硫液组成中的碱度值、硫代硫酸根的浓度。

关键词: 脱硫液组成, EDTA-Fe, 稳定性, 选择性

Abstract: The desulphurization system was established with EDTA-Fe as the catalyst for removing iron complex from gaseous hydrogen sulfide. The effects of alkalinity,EDTA/Fe molar ratio, total iron concentration, and thiosulfate concentration on the stability and desulfurization selectivity of EDTA-Fe catalyst were investigated. The experimental results showed that the degradation rate of EDTA and the selectivity of desulphurization were decreased with the increase of alkalinity value in desulphurization solution. The rise of EDTA/Fe mole ratio led to an increased EDTA degradation rate and reduced desulfurization selectivity. With the increase of total iron concentration,the degradation rate of EDTA increased, and the selectivity of desulfurization decreased. The increase of thiosulfate concentration significantly reduced the degradation rate of EDTA and increased the selectivity of desulfurization. When considering the degradation rate and selectivity of EDTA,the molar ratio of EDTA/Fe and the total iron concentration should be reduced as much as possible. In contrast,the basicity value and thiosulfate concentration in the composition of the desulfurizing solution should be appropriately increased.

Key words: composition of desulfurization solution, EDTA-Fe, stability, selectivity

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