Removal of nitric oxide and sulfur dioxide from flue gases using a FeII-ethylenediamineteraacetate solution

Zhu, Hai-Song; Mao, Yan-Peng; Chen, Yu; Long, Xiang‐li; Wang, Yuan

doi:10.1007/s11814-013-0053-4

Cited by 12 publications

(13 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, it was detected the easy combination of NO with transition metals, so different metals were specifically designed for NO capture . All these absorbents were aqueous solutions, limited by the low NO solubility in water …”

Section: Introductionmentioning

confidence: 99%

“…17 All these absorbents were aqueous solutions, limited by the low NO solubility in water. 18 In past years, ionic liquids (ILs) are proposed as new chemical solvents, attracting a huge number of studies in, for example, gas capture applications, 19 due to their characteristic properties such as high absorption capacity, low vapor pressure, and high thermal and chemical stability, 20 among others. Therefore, ILs have been extensively evaluated in gas capture, for instance, CO 2, 21 SO 2, 22 H 2 S, 23 NH 3, 24 and volatile organic compounds.…”

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Methanol-Promoted Oxidation of Nitrogen Oxide (NO_x) by Encapsulated Ionic Liquids

Santiago

Mossin

Bedia

et al. 2019

Environ. Sci. Technol.

View full text Add to dashboard Cite

The removal of nitrogen oxides (NO x) has been extensively studied due to their harmful effects to health and environment. In this work, Encapsulated Ionic Liquids (ENILs) are used as catalysts for the NO oxidation at humid conditions and low temperatures. Hollow carbon capsules (C Cap) were first synthetized to contain different amounts of 1-butyl-3-methylimidazolium nitrate IL ([bmim][NO 3 ]), responsible for the catalytic oxidation. Then, the materials were characterized using different techniques, by analyzing microstructure, porosity, elemental composition and thermal stability. The catalytic performance of ENIL materials was tested for NO conversion at different conditions. Thus, NO concentration was fixed at 2,000 ppm at dry and humid conditions. Then, the methanol promotion of the reaction was demonstrated, increasing the NO conversion values in all cases, and the alcohol/water ratio was optimized. The temperature effect was studied as well, using the optimal conditions based on the previous measurements. The results reflect that humid conditions do not have a negative effect in terms of NO conversion when using ENILs, opposite behavior as the observed for C Cap and traditional catalysts studied before. Low amount of IL inside the material (40% in mass) was found to be the optimum for the task, reaching conversions of almost 45% in near industrial conditions of temperature and O 2 and H 2 O concentrations in the flue gas with a GHSV = 10,000 h-1 .

show abstract

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Methanol-Promoted Oxidation of Nitrogen Oxide (NO_x) by Encapsulated Ionic Liquids

Santiago

Mossin

Bedia

et al. 2019

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Coal combustion is a major source of flue gas emissions, which contain nitrogen oxides (NO x ) and sulfur dioxide (SO 2 ). These pollutants have numerous negative impacts on aquatic life, human health, environmental balance, and ozone depletion. − Compared to SO 2 , NO x is a relatively challenging to handle, as NO, which accounts for 90–95% of the NO x , has poor water solubility and cannot be removed through a simple alkali absorption process in the same way as SO 2 . , To facilitate the absorption of NO, metal complexes such as EDTA–Fe(II) that can rapidly react with NO and form dissolved metal-nitrosyl complexes (e.g., EDTA–Fe(II)–NO) have been employed. , This process is widely known as the wet scrubbing method for NO removal. Since the regeneration of metal complexes can be achieved by directly using SO 2 from the flue gas as the reductant source (i.e., via formation of SO 3 2– after absorption by the scrubber), the wet scrubbing method is of particular interest for the simultaneous removal of NO and SO 2 without additional chemical consumption. , …”

Section: Introductionmentioning

confidence: 99%

“…As mentioned above, the conversion of NO to N 2 O is a nonissue in the traditional wet scrubbing method with SO 2 as the reductant source. , However, the recovery and collection of N 2 O are difficult, as the produced N 2 O would easily escape from the system with the treated flue gas. ,, Furthermore, although the processes of NO absorption and reduction to N 2 O may be operated separately, the emission of N 2 O to the atmosphere still cannot be avoided because N 2 O is highly water-soluble, resulting in some of the produced N 2 O dissolving in the scrubber and reentering the absorption process, as shown in Figure A. , …”

Section: Introductionmentioning

confidence: 99%

NO Removal with Efficient Recovery of N₂O by Using Recyclable Fe₃O₄@EDTA@Fe(II) Complex: A Novel Approach toward Resource Recovery from Flue Gas

Sharif

Cheng

Haider

et al. 2018

Environ. Sci. Technol.

View full text Add to dashboard Cite

Traditional technologies for handling nitrogen oxides (NO x ) from flue gas commonly entail the formation of harmless nitrogen gas (N 2 ), while less effort has been made to recover the N-containing chemicals produced. In this work, we developed a novel nanomagnetic adsorbent, Fe 3 O 4 @ EDTA@Fe(II) (MEFe(II)), for NO removal. The NO adsorbed by MEFe(II) was then selectively converted to N 2 O, a valuable compound in many industries, by using sulfite (a product from desulfurization in flue gas treatment) as the reductant for the regeneration of MEFe(II). Because of the magnetic and solid properties of MEFe(II), the processes of NO adsorption and N 2 O recovery can be readily carried out under their optimal pH conditions in separate systems. In addition, the produced N 2 O is easily handled without unwanted release to the atmosphere. At the optimal pH (7.5 and 8.0 for NO adsorption and N 2 O recovery, respectively), the maximum NO adsorption capacity of MEFe(II) was measured as 0.303 ± 0.037 mmol•g −1 , over 90% of which was converted to N 2 O during the recovery process. Moreover, MEFe(II) exhibited good five consecutive cycles. All of above reactions were performed at room temperature. These findings indicate MEFe(II) may hold great potential for application to NO removal from flue gas with the benefits of resource recovery, decreased chemical use, and low energy consumption.

show abstract

“…NO is one of the main air pollutants due to its contribution to acid rain, photochemical smog and depletion of the stratospheric ozone layer [1,2]. The most effective technique to eliminate NO is the selective catalytic reduction (SCR) of NO with NH 3 [1,[3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Promoting role of sulfur groups in selective catalytic reduction of NO with NH3 over H2SO4 modified activated carbons

Guo

Wen

Cheng

et al. 2015

Korean J. Chem. Eng.

View full text Add to dashboard Cite

To determine the role of sulfur groups formed on activated carbon (AC) in the selective catalytic reduction (SCR) of NO with NH 3 , coal-based AC was modified by H 2 SO 4 under various conditions and then treated in N 2 atmosphere at 400 o C. The resulting carbons were characterized by N 2 adsorption, elemental analysis, temperature programmed desorption and X-ray photoelectron spectroscopy, and tested for the SCR of NO with NH 3 in the temperature range of 30-250 o C. Results reveal that H 2 SO 4 modification has little effect on the textural properties, but promotes the formation of sulfur and oxygen groups. The sulfur groups incorporated by H 2 SO 4 modification are mainly sulfonic groups and then sulfates. In particular, these sulfur groups play a predominant role in improving NH 3 adsorption and then enhancing the SCR activity of modified carbons above 150 o C. However, the contribution of oxygen groups to NO reduction is very limited under the conditions employed in this work.

show abstract

Removal of nitric oxide and sulfur dioxide from flue gases using a FeII-ethylenediamineteraacetate solution

Cited by 12 publications

References 21 publications

Methanol-Promoted Oxidation of Nitrogen Oxide (NO_x) by Encapsulated Ionic Liquids

Methanol-Promoted Oxidation of Nitrogen Oxide (NO_x) by Encapsulated Ionic Liquids

NO Removal with Efficient Recovery of N₂O by Using Recyclable Fe₃O₄@EDTA@Fe(II) Complex: A Novel Approach toward Resource Recovery from Flue Gas

Promoting role of sulfur groups in selective catalytic reduction of NO with NH3 over H2SO4 modified activated carbons

Contact Info

Product

Resources

About

Removal of nitric oxide and sulfur dioxide from flue gases using a FeII-ethylenediamineteraacetate solution

Cited by 12 publications

References 21 publications

Methanol-Promoted Oxidation of Nitrogen Oxide (NOx) by Encapsulated Ionic Liquids

Methanol-Promoted Oxidation of Nitrogen Oxide (NOx) by Encapsulated Ionic Liquids

NO Removal with Efficient Recovery of N2O by Using Recyclable Fe3O4@EDTA@Fe(II) Complex: A Novel Approach toward Resource Recovery from Flue Gas

Promoting role of sulfur groups in selective catalytic reduction of NO with NH3 over H2SO4 modified activated carbons

Contact Info

Product

Resources

About

Methanol-Promoted Oxidation of Nitrogen Oxide (NO_x) by Encapsulated Ionic Liquids

Methanol-Promoted Oxidation of Nitrogen Oxide (NO_x) by Encapsulated Ionic Liquids

NO Removal with Efficient Recovery of N₂O by Using Recyclable Fe₃O₄@EDTA@Fe(II) Complex: A Novel Approach toward Resource Recovery from Flue Gas