Controlling mechanism in the aqueous absorption of nitrogen oxides

Peters, M. S.; Ross, C.; Klein, Jacob

doi:10.1002/aic.690010116

Cited by 21 publications

(10 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The desorption spectra in Figs 4 and 5 show much less ammonia than would be expected according to Eqs (16) and (17). Below 1) Calculated from the heats of formation of reactants and products.…”

Section: I'kermal Regeneration Of Soaked Samplesmentioning

confidence: 57%

Modelling of thermal desorption of active coke loaded with sulphuric acid and ammonium sulphate

Richter

1990

Chem Eng & Technol

View full text Add to dashboard Cite

The BF-Uhde-Mitsui Process uses active coke for SO,-and NOx-removal from flue gases in the temperature range between 100 and 190 "C. Experimental methods of thermal regeneration were applied to the evaluation of the state of the adsorbent after use in flue gas cleaning and of the parameters for desorber design. A reaction model was derived from experiments carried out in differential and back-mix reactors. The parameters were evaluated by adaptation of the model to the desorption spectra. The model was successfully applied to the regeneration of active coke in a fluidized bed reactor.

show abstract

Section: I'kermal Regeneration Of Soaked Samplesmentioning

confidence: 57%

Modelling of thermal desorption of active coke loaded with sulphuric acid and ammonium sulphate

Richter

1990

Chem Eng & Technol

View full text Add to dashboard Cite

show abstract

“…They also found that column efficiency could be increased by reducing the operating temperature or by increasing the operating pressure. The column performance was accurately predicted using Bodenstein's data for the oxidation of NO and existing equilibrium Peters, Ross, and Klein (1955) studied N0i absorption in a singleplate 0.19-m-ID bubble-cap column equipped with seven bubble caps. The experiment was conducted at acid concentrations of 0 and 2.6 kg-mol m-3 and NO z partial pressures up to 0.10 atm.…”

Section: Studies With Prototype and Full-scale No X Scrubbing Equipmentmentioning

confidence: 99%

Scrubbing of gaseous nitrogen oxides in packed towers

Counce¹

1980

View full text Add to dashboard Cite

Gaseous nitrogen oxides were scrubbed with water at 298 K and at near atmospheric pressure in towers packed with 6-and l3-rnm Intalox saddles. Nitrogen oxide removal efficiencies from 55 to 97% were obtained over a wide variation of packing depths. Other studies concerning the depletion of nitrous acid in packed towers are also presented.A mathematical model was developed based on the mass-transfer information for packed towers and chemical-reaction and mechanistic phenomena specific to the NO -HNO -H 2 0 system. Calculated NO removal x x x efficiencies utilizing this model agree with the observed experimental phenomena fairly closely. The model is presented and discussed along with the results of the experimental actiVities .

show abstract

“…The absorption of N02 in aqueous solutions has been studied extensively, but the mechanism of absorption is still subject to controversy. The process involves gas phase reaction (for example, Caudle and Denbigh, 1953; Peters et al, 1955), liquid phase reaction (for example, Wendel and Pigford, 1958;Kramers et al, 1959; Andrew and Hanson, 1961), and diffusion of products and reactants to and from the gas-liquid interface (for example, Wendel and Pigford, 1958;Chilton and Knell, 1972).…”

Section: Introductionmentioning

confidence: 99%

Absorption of Nitrogen Oxides in Aqueous Sodium Sulfite and Bisulfite Solutions

Takeuchi¹,

Ando²,

Kizawa³

1977

Ind. Eng. Chem. Proc. Des. Dev.

View full text Add to dashboard Cite

Absorption experiments of NO and N02 diluted with nitrogen (NO* concentrations over a few hundred ppm) in aqueous solutions of sodium sulfite and/or bisulfite were performed at 25 °C using the agitated vessels with gas dispersion and with a plane interface. The experimental results were discussed based on the film theory of gas absorption accompanied by fast, pseudo mth order chemical reaction. The reaction between NO and S032was found to be second order with respect to NO and zero order with respect to S032-, and the rate of absorption of NO into the sulfite solution increased as the concentration of N02 in the gas phase increased. As for the absorption of N02 in the sulfite solution, it was found that the absorption rates went through a maximum as the sulfite concentration varied, and the reaction mechanism to absorption was with competitive reactions involving the hydrolysis of N02 and the reaction between N02 and S032-in the liquid film. The reduction of N02 was found to be first order with respect to S032-and first order with respect to N02, and so the value of the second-order rate constant was evaluated, while for the hydrolysis of N02 the reaction order was second order with respect to N02. Also the absorption of N02 into the bisulfite solution was accompanied by competitive reactions as well as in the sulfite solution. In addition, aqueous solutions with various reducing or oxidizing agents were examined for the absorption of N02. Furthermore, the effect of temperature on the absorption of N02 in the sulfite solution was studied at 10, 15, and 25 °C.

show abstract

Controlling mechanism in the aqueous absorption of nitrogen oxides

Cited by 21 publications

References 10 publications

Modelling of thermal desorption of active coke loaded with sulphuric acid and ammonium sulphate

Modelling of thermal desorption of active coke loaded with sulphuric acid and ammonium sulphate

Scrubbing of gaseous nitrogen oxides in packed towers

Absorption of Nitrogen Oxides in Aqueous Sodium Sulfite and Bisulfite Solutions

Contact Info

Product

Resources

About