Absorption of nitrogen oxides in aqueous solutions in a structured packing pilot column

Paiva, José Luís de; Kachan, George Cury

doi:10.1016/j.cep.2003.08.005

Cited by 38 publications

(22 citation statements)

References 17 publications

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“…The task of the first program is to solve Equations (1-9) and Equations (13)(14)(15)(16)(17)(18)(19)(20) and find the velocity distribution of gas and liquid in each part of the column. Having the velocity distribution in liquid and gas, the second program is used to solve governing equations relating to the mass and heat transfers (28-49).…”

Section: Resultsmentioning

confidence: 99%

“…The following calculations were carried out for all the segments starting with the first segment for which (at the bottom of the column) the conditions of entering gas and exiting liquid are known. -The space of the segment was discretized in and directions and mass balance Equations (28) through (35), which included velocity distribution, Equations (13)(14)(15)(16)(17)(18)(19)(20), and energy balance, Equation (38), with their boundary conditions of (44) through (48) were applied in each point of discretized space.…”

Section: Methods Of Solutionmentioning

confidence: 99%

“…This study deals with the absorption of dilute nitrogen oxides NO x into aqueous solutions of hydrogen peroxide and of sodium hydroxide at atmospheric pressure. A pilot column filled with the structured metallic packing Optiflow TM was employed [19]. Thin film flow over structured packings was also studied by Prashant Valluri in 2005.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Separation Performance of a Structured Packed Column with a Tray-Type Column for H₂S and CO₂

Baniadam

Fathikalajahi

Rahimpour

2009

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Comparaison des performances de séparation d'une colonne à garnissage structurée avec celles d'une colonne à plateaux pour l'H 2 S et le CO 2 -L'absorption de gaz acides, H 2 S et CO 2 , par la méthyldiéthanolamine dans une colonne à garnissage structure équipée du Montz-Pak A3-500 a été modélisée mathématiquement. Les dimensions des canaux ainsi que leur nombre et le modèle d'écoulement du film liquide sont similaires à ceux des travaux de Shilkin. Les équations de transfert de la chaleur et de la masse sont dérivées pour le film liquide de réaction et le gaz qui s'écoule à contrecourant dans la colonne. La répartition de la concentration est calculée sur tout le film liquide en mouvement et aucune zone présentant des conditions de concentration équilibrée n'est prise en compte dans le liquide réactif. Les résultats du modèle pour la colonne structurée montrent de meilleures performances d'absorption du H 2 S qu'avec une colonne à plateaux dans les mêmes conditions. Les résultats obtenus par le modèle indiquent une répartition appréciable de la répartition de la concentration et de la température le long de la colonne. Abstract -Comparison of Separation Performance of a Structured Packed Column with a Tray-Type

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Section: Resultsmentioning

confidence: 99%

Section: Methods Of Solutionmentioning

confidence: 99%

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Comparison of Separation Performance of a Structured Packed Column with a Tray-Type Column for H₂S and CO₂

Baniadam

Fathikalajahi

Rahimpour

2009

Oil & Gas Science and Technology - Rev. IFP

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“…y B (z) ) y B1 exp(-0.057z) (13) hence, a value for E ≈ 5 is proposed for the enhancement of SO 2 absorption. Further carefully designed and well-controlled laboratory measurements need to be undertaken to establish whether this is the correct mass transfer regime consistent with the plant material balances over the BOT.…”

Section: Simultaneous Stripping Absorption and Reaction In The Botmentioning

confidence: 98%

Chemical Reaction Engineering Analysis of the Blowout Process for Bromine Manufacture from Seawater

El‐Hamouz

Mann

2006

Ind. Eng. Chem. Res.

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A chemical reaction engineering model has been constructed to describe the extraction and recovery of bromine from a once-through seawater flow. The process uses a closed-loop circulation flow of air. This strips out free bromine from pre-chlorinated seawater in a packed column. Bromine liberated into the gas reacts with injected sulfur dioxide around a circulation loop to form liquid droplets containing product hydrobromic acid captured by mist elimination. Excesses of chlorine and sulfur dioxide compete for bromine and can reduce the recovery efficiency. Pseudo-homogeneous gas-phase kinetics accounts for simultaneous absorption and gas-liquid reaction of liberated bromine, excess chlorine, and injected sulfur dioxide. Re-circulating sulfur dioxide subsequently absorbs and reacts simultaneously with bromine and chlorine stripping. Parameter values are deduced for typical bromine recovery of 70%. The model can be used for optimizing the excesses of chlorine and sulfur dioxide.

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“…During the past years, oxidants such as NaClO 2 , NaClO 3 , ClO 2 , KMnO 4 , H 2 O 2 , and Fenton reagent were used for NO oxidation. Most of the investigations mentioned above were carried out under strongly alkaline conditions, but the strongly alkaline conditions are far from that of a typical wet flue gas desulfurization scrubber.…”

Section: Introductionmentioning

confidence: 99%

Absorption of NO by using aqueous KMnO₄/(NH₄)₂CO₃ solutions

Pan

Guo

Zhang

et al. 2012

Env Prog and Sustain Energy

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The absorption process of NO into KMnO4/(NH4)2CO3 solutions was studied in a stirred tank reactor. The experimental results showed that the reaction process was a fast pseudo‐m reaction. The reaction between NO and aqueous solutions of KMnO4/(NH4)2CO3 was found to be first‐order with respect to NO and with respect to KMnO4. The frequency factor and the average activation energy of this reaction were 2.3 × 109 m3/(mol s) and 36.77 kJ/mol, respectively. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 564–568, 2013

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Absorption of nitrogen oxides in aqueous solutions in a structured packing pilot column

Cited by 38 publications

References 17 publications

Comparison of Separation Performance of a Structured Packed Column with a Tray-Type Column for H₂S and CO₂

Comparison of Separation Performance of a Structured Packed Column with a Tray-Type Column for H₂S and CO₂

Chemical Reaction Engineering Analysis of the Blowout Process for Bromine Manufacture from Seawater

Absorption of NO by using aqueous KMnO₄/(NH₄)₂CO₃ solutions

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Absorption of nitrogen oxides in aqueous solutions in a structured packing pilot column

Cited by 38 publications

References 17 publications

Comparison of Separation Performance of a Structured Packed Column with a Tray-Type Column for H2S and CO2

Comparison of Separation Performance of a Structured Packed Column with a Tray-Type Column for H2S and CO2

Chemical Reaction Engineering Analysis of the Blowout Process for Bromine Manufacture from Seawater

Absorption of NO by using aqueous KMnO4/(NH4)2CO3 solutions

Contact Info

Product

Resources

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Comparison of Separation Performance of a Structured Packed Column with a Tray-Type Column for H₂S and CO₂

Comparison of Separation Performance of a Structured Packed Column with a Tray-Type Column for H₂S and CO₂

Absorption of NO by using aqueous KMnO₄/(NH₄)₂CO₃ solutions