Simultaneous removal of NO and SO2 with hexamminecobalt(II) solution coupled with the hexamminecobalt(II) regeneration catalyzed by activated carbon

Long, Xiang‐li; Xin, Zhiling; Wang, Hongxin; Xiao, Wen‐De; Wang, Yuan

doi:10.1016/j.apcatb.2004.05.020

Cited by 48 publications

(82 citation statements)

References 20 publications

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“…Long [19][20][21][22][23][24][25] has proposed a novel technique for the simultaneous elimination of NO and SO 2 from the flue gases by adding soluble cobalt(II) salt into the aqueous ammonia solution. The hexamminecobalt(II) ion produced by NH 3 coordinating with Co 2+ can not only bind NO but also activate the oxygen molecule.…”

Section: Introductionmentioning

confidence: 99%

Experimental determination of equilibrium constant for the complexing reaction of nitric oxide with hexamminecobalt(II) in aqueous solution

Mao

Chen

Long

et al. 2009

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Experimental determination of equilibrium constant for the complexing reaction of nitric oxide with hexamminecobalt(II) in aqueous solution

Mao

Chen

Long

et al. 2009

Journal of Hazardous Materials

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“…Long et al [13] put forward a novel technique for the simultaneous elimination of NO and SO 2 from the flue gas by adding soluble cobalt (II) salt into aqueous ammonia solution. The Co(NH 3 ) 6 21 formed by ammonia binding with Co 21 is the active constituent of scrubbing NO from the flue gas streams.…”

Section: Introductionmentioning

confidence: 99%

Reduction of hexamminecobalt (III) catalyzed by coconut activated carbon

Long

Cheng

Wang

2010

Env Prog and Sustain Energy

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The wet ammonia desulphurization process can be retrofitted to remove NO and SO 2 simultaneously by adding soluble cobalt (II) salt into the aqueous ammonia solution. The hexamminecobalt (II), Co(NH 3 ) 6 21 , is the active constituent in the removal of nitric oxide with the hexamminecobalt ammonia solution. To maintain the capability of removing NO with the hexamminecobalt solution, activated carbon is used to catalyze the reduction of hexamminecobalt (III) to hexamminecobalt (II). In this study, the study on the investigation into the intrinsic kinetics of the hexamminecobalt (III) conversion has been performed. The reduction of hexamminecobalt (III) catalyzed by coconut activated carbon has been studied in a batch stirred cell without the external or internal mass transfer resistances. The experimental results show that the reaction rate increases with the activated carbon mass and the concentration of hexamminecobalt (III Prog, 29: 85-92, 2010

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“…In order to sustain the capacity of removing NO from the flue gases, activated carbon is used [11,12] to speed up the regeneration CoðNH 3 Þ 2þ 6 . The adsorption behavior of ammonia on activated carbon has been investigated [13].…”

Section: Introductionmentioning

confidence: 99%

Adsorption–Reduction Behavior of Co(NH₃) on Activated Carbon

Mao

Chen

Cheng

et al. 2011

CLEAN Soil Air Water

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A novel method has been put forward to retrofit the wet ammonia desulfurization process to realize the combined removal of sulfur dioxide and nitric oxide by introducing soluble cobalt(II) salt into aqueous ammonia solution. The active constituent of scrubbing NO from the flue gases is the CoðNH 3 Þ 2þ 6 produced by ammonia coordinating with Co 2þ . The regeneration of CoðNH 3 Þ 2þ 6can be realized under the catalysis of activated carbon so as to sustain a high NO removal efficiency for a long time. In this paper, the adsorption-reduction behavior of CoðNH 3 Þ 3þ 6 on activated carbon has been researched using scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. A conclusion can be drawn from the results that cobalt ions in the aqueous solution are adsorbed by activated carbon and most of them are reduced to Co 2þ ions, and some of the Co 2þ ions are further reduced into metallic cobalt. The results also demonstrate that the functional groups on the surface of carbon take part in this redox reaction. The C-H groups on the carbon surface are oxidized into C-OH, and then some of the hydroxyl groups are further oxidized into carbonyl or carboxyl groups.

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Simultaneous removal of NO and SO2 with hexamminecobalt(II) solution coupled with the hexamminecobalt(II) regeneration catalyzed by activated carbon

Cited by 48 publications

References 20 publications

Experimental determination of equilibrium constant for the complexing reaction of nitric oxide with hexamminecobalt(II) in aqueous solution

Experimental determination of equilibrium constant for the complexing reaction of nitric oxide with hexamminecobalt(II) in aqueous solution

Reduction of hexamminecobalt (III) catalyzed by coconut activated carbon

Adsorption–Reduction Behavior of Co(NH₃) on Activated Carbon

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Simultaneous removal of NO and SO2 with hexamminecobalt(II) solution coupled with the hexamminecobalt(II) regeneration catalyzed by activated carbon

Cited by 48 publications

References 20 publications

Experimental determination of equilibrium constant for the complexing reaction of nitric oxide with hexamminecobalt(II) in aqueous solution

Experimental determination of equilibrium constant for the complexing reaction of nitric oxide with hexamminecobalt(II) in aqueous solution

Reduction of hexamminecobalt (III) catalyzed by coconut activated carbon

Adsorption–Reduction Behavior of Co(NH3) on Activated Carbon

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Adsorption–Reduction Behavior of Co(NH₃) on Activated Carbon