Kinetics for the simultaneous removal of NO and SO2 with cobalt ethylenediamine solution

Long, Xiang‐li; Xin, Zhiling; Chen, Mao-bing; Li, Wei; Xiao, Wen‐De; Wang, Yuan

doi:10.1016/j.seppur.2007.05.004

Cited by 40 publications

(28 citation statements)

References 26 publications

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“…Fig. 1 illustrates that in the Mn-SO 2 -NO x -H 2 O system, oxidation potential of MnO 2 and O 2 are higher than that of S(IV) species, NO 2 and HNO 2 , indicating that MnO 2 and O 2 have the potential to oxidize them to SO 4 2− and NO 3 − , respectively. Accordingly, there are two reaction patterns in the process of SO 2 /NO x removal in flue gas with pyrolusite slurry: (1) MnO 2 as oxidant;…”

Section: Theoreticalmentioning

confidence: 99%

“…5. The relationship of total amount between SO 2 and NO x removed from flue gas and SO 4 2− , NO 3 − in liquid phase were all listed in Table 4.…”

Section: Simultaneous Absorption Of No X and So 2 With Pyrolusite Slumentioning

confidence: 99%

“…Various kinds of technologies have been developed to control and reduce SO 2 and NO x emissions worldwide. Though high SO 2 removal efficiency can be obtained by wet SO 2 removal process which is widely used at present, it is difficult to attain the high NO x removal efficiency at the same time because of the low solubility of NO that accounts for more than 90% of all NO x [4,5]. Moreover, the presence of SO 2 can also lead to catalyst poisoned and invalidation in selective catalytic reduction (SCR) process [6,7], which is considered as the most effective process for NO x removal.…”

Section: Introductionmentioning

confidence: 99%

“…In absorption-oxidation process, liquid oxidants with strong oxidability are used as absorbent, such as sodium chlorite [10][11][12], hydrogen peroxide [13] and potassium permanganate [2,14]. Although using strong oxidizing agents can improve NO x removal efficiency, there are certain drawbacks, such as the expensive cost of oxidizing agents [4,22] and disposal problems of absorption solution [22]. While in oxidation-absorption process, gas phase oxidants, such as hydrogen peroxide [15,16] and ozone [8,[17][18][19][20][21], are injected into flue gas first to oxidize NO to NO 2 which is highly soluble in water, and then NO 2 and SO 2 can be removed simultaneously by wet removal process.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous absorption of NOx and SO2 from flue gas with pyrolusite slurry combined with gas-phase oxidation of NO using ozone

Sun

Ding

Zeng

et al. 2011

Journal of Hazardous Materials

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Section: Theoreticalmentioning

confidence: 99%

“…5. The relationship of total amount between SO 2 and NO x removed from flue gas and SO 4 2− , NO 3 − in liquid phase were all listed in Table 4.…”

Section: Simultaneous Absorption Of No X and So 2 With Pyrolusite Slumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simultaneous absorption of NOx and SO2 from flue gas with pyrolusite slurry combined with gas-phase oxidation of NO using ozone

Sun

Ding

Zeng

et al. 2011

Journal of Hazardous Materials

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“…It is difficult to obtain the significant NO x removal efficiency because of the low solubility of nitric oxide (NO) that accounts for more than 90 % of all oxides of nitrogen as NO x (Jin et al 2006;Long et al 2008) by wet removal processes. Several authors have studied the use of various aqueous solutions (acid urea, hydrogen peroxide, sodium hypochlorite, sodium sulphite solutions, etc.)…”

Section: Introductionmentioning

confidence: 99%

Nitric oxide absorption by hydrogen peroxide in airlift reactor: a study using response surface methodology

Bhanarkar

Gupta

Biniwale

et al. 2013

Int. J. Environ. Sci. Technol.

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Absorption of nitric oxide from nitric oxide /air mixture in hydrogen peroxide solution has been studied on bench scale internal loop airlift reactor. The objective of this investigation was to study the performance of nitric oxide absorption in hydrogen peroxide solution in the airlift reactor and to explore/determine the optimum conditions using response surface methodology. A BoxBehnken model has been employed as an experimental design. The effect of three independent variables-namely nitric oxide gas velocity, 0.02-0.11 m/s; nitric oxide gas concentration, 300-3,000 ppm and hydrogen peroxide concentration, 0.25-2.5 %-has been studied on the absorption of nitric oxide in aqueous hydrogen peroxide in the semi-batch mode of experiments. The optimal conditions for parameters were found to be nitric oxide gas velocity, 0.02 m/s; nitric oxide gas concentration, 2,246 ppm and hydrogen peroxide concentration, 2.1 %. Under these conditions, the experimental nitric oxide absorption efficiency was observed to be *65 %. The proposed model equation using response surface methodology has shown good agreement with the experimental data, with a correlation coefficient (R 2 ) of 0.983. The results showed that optimised conditions could be used for the efficient absorption of nitric oxide in the flue gas emanating from industries.

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Hydrochloric Acid‐Assisted Regeneration of Cobalt Ethylenediamine for NO_x Remediation in Flue Gas

Yang

Liu

et al. 2021

Chem Eng & Technol

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Cobalt ethylenediamine ([Co(en) 3 ] 3+ ) is widely used for NO x remediation in flue gas. However, its industrial applications are limited due to the lack of an efficient regeneration method that converts Co 3+ to Co 2+ . Here, hydrogen chloride is applied as an additive and the performance of cobalt ethylenediamine under variable flue gas compositions is analyzed. The results demonstrate that low pH values favor the conversion of Co 3+ to Co 2+ . Further, a reaction temperature of 100°C and more than three minutes reaction time were found to accelerate the reduction of Co 3+ . The NO x removal efficiency could reach more than 70 % after the first regeneration. After 23 consecutive days of continuous experiments, the denitration efficiency of flue gas could be as high as 60 % or more.

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Kinetics for the simultaneous removal of NO and SO2 with cobalt ethylenediamine solution

Cited by 40 publications

References 26 publications

Simultaneous absorption of NOx and SO2 from flue gas with pyrolusite slurry combined with gas-phase oxidation of NO using ozone

Simultaneous absorption of NOx and SO2 from flue gas with pyrolusite slurry combined with gas-phase oxidation of NO using ozone

Nitric oxide absorption by hydrogen peroxide in airlift reactor: a study using response surface methodology

Hydrochloric Acid‐Assisted Regeneration of Cobalt Ethylenediamine for NO_x Remediation in Flue Gas

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Kinetics for the simultaneous removal of NO and SO2 with cobalt ethylenediamine solution

Cited by 40 publications

References 26 publications

Simultaneous absorption of NOx and SO2 from flue gas with pyrolusite slurry combined with gas-phase oxidation of NO using ozone

Simultaneous absorption of NOx and SO2 from flue gas with pyrolusite slurry combined with gas-phase oxidation of NO using ozone

Nitric oxide absorption by hydrogen peroxide in airlift reactor: a study using response surface methodology

Hydrochloric Acid‐Assisted Regeneration of Cobalt Ethylenediamine for NOx Remediation in Flue Gas

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About

Hydrochloric Acid‐Assisted Regeneration of Cobalt Ethylenediamine for NO_x Remediation in Flue Gas