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Citation: ZHAI Lin-Zhi, ZHONG Qin. Desulfurization of Flue Gas Simulated with Amine Solution[J]. Chinese Journal of Applied Chemistry, ;2009, 26(8): 952-955. shu

Desulfurization of Flue Gas Simulated with Amine Solution

ZHAI Lin-Zhi ,
ZHONG Qin ^,

1.
School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094

Corresponding author: ZHONG Qin,
Received Date: 27 June 2008
Available Online: 2 March 2009
Fund Project: 江苏省高校科研成果产业化推进项目(HJ07-008) (HJ07-008)

Experimental research on the desulfurization of flue gas was simulated with 0.3 mol/L amine solutions of ethanolamine,ethylenediamine and so on.Desulfurization efficiency was studied by iodometry titration.Absorption capacity of SO₂,oxidation of absorbed SO₂ and desorption efficiency of SO₂ were researched via ion chromatography,and the effects of the number of cycles on the desulfurization efficiency and SO₂ content of rich absorbent were studied.The results show that the desulfurization efficiency of all the absorbents were maintained at 99% for 30 min.After 60 min,the desulfurization efficiency of ethylenediamine solutions remained 99%,but that of alcohol amine solutions decreased significantly.The absorption capacity of the ethylenediamine solution for SO₂ was 455 mg/L,much higher than that of the alcohol amine solution.With boric acid added to the ethylenediamine solution,the absorption capacity was slightly lower(450 mg/L),but the oxidation efficiency of absorbed SO₂ reduced from 1.14% to 0.29%.At the same time,the desorption efficiency of SO₂ increased from 38.0% to 59.0%.Absorption-desorption cycle experiments indicated that the average desulfurization efficiency of the ethylenediamine/boric acid solution reached above 99%,and SO₂ content of rich absorbents decreased from 0.44 mol/L to 0.40 mol/L.The results suggest the desulfurization effect of the ethylenediamine/boric acid solution is excellent as the flue gas absorbent.
- alcohol amine,
- ethylenediamine,
- ethylenediamine/boric acid,
- flue gas desulfurization
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