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Simultaneous Removal of SO2 and NOX with Regenerable Ferrous Cysteine Solution(PDF)

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2000年05期
Page:
441-444
Research Field:
Publishing date:

Info

Title:
Simultaneous Removal of SO2 and NOX with Regenerable Ferrous Cysteine Solution
Author(s):
ZhongQin LuZhe ChenQianqiao
School of Chemical Engineering,NUST,Nanjing 210094
Keywords:
f lue gas desulfurizat ion cysteine regenerable f lue gas denit rif izat ion jet bubbling reactor
PACS:
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DOI:
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Abstract:
Simultaneous removal of SO2 and NOX w ith regenerable ferrous cysteine solution w as investigated in a jet bubbling reactor. The experimental results show that in alkaline med-i um, ferrous cysteine solution absorbs NO to form nitrosyl ferrous chelates, and the cysteine ( CySH) is oxidized into cyst ine ( CySSCy) , and the absorped of NO is reduced to yield N2. CySSCy can be converted back to CySH by SO2 in f lue gas, thus making possible the recycling of the react ions of remov al of SO2 and NOX w ith cysteine solution. T he eff iciency of NOX removal is affected by pH value of the absorption solut ion and the concent rat ion of Fe( CyS) 2. T his process can be described w ith the model of mass t ransfer. Above 82. 3 % of NOX removal and above 94. 4 % of SO2 removal can be simultaneously obtained by cont rolling the temperature at 55 ℃ and pH= 7.

References:

1 Chang S G, Littlejohn D, Lynn S. Effects of metal chelateson wet flue gas scrubbing chemistr y. Enviro n Sci Technol, 1983, 17: 649~ 655
2 Littlejohn D, Chang S G. Identification of species in a w et flue gas desulfurization and denitrification system by laser raman spectroscopy. Enviro n Sci Technol, 1984, 18: 305~ 312
3 Shi Y, Wang H, Chang S G. Kinetics of NO absorption in ir on ( I I) thiochelate solution. Environ Prog , 1997, 16: 301~ 306

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Last Update: 2013-03-25