A direct contact cooler design for simultaneously recovering latent heat and capturing SOx and NOx from pressurized flue gas

Verma, Piyush; Yang, Zhiwei; Axelbaum, Richard L.

doi:10.1016/j.enconman.2022.115216

Cited by 3 publications

(2 citation statements)

References 25 publications

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“…To check the validity of the model developed, a comparison of the results predicted by the Aspen rate-based model and the experimental data taken from the literature [38] is performed, by varying the solvents tested, the liquid flow rate, the NO x partial pressure and the oxidation ratio. The input data, operating conditions and absorption results of the 40 experimental pilot-scale tests are summarized in Table 5.…”

Section: Model Results and Validationmentioning

confidence: 99%

“…The Electrolyte Non-Random Two Liquid (NRTL) property method in Aspen Plus ® was selected for thermodynamic properties estimations as the recommended option for systems containing electrolytes because of ionic interactions in the liquid phase requiring the use of an electrolytic equation of state. Its compatibility with the system NO x -HNO 3 -H 2 O 2 for both the liquid and gas phases was tested successfully by [38]. The properties of the liquid phase are assessed from an activity-coefficient model based on the NRTL equations and the properties of the vapor phase from the Redlich-Kwong equation of state [19,39].…”

Section: Selection Of Thermodynamic Model For the Liquid Phasementioning

confidence: 99%

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Pilot-scale Validation of the Modeling of NOx Reactive Absorption Process Using Aqueous Solutions Containing Nitric Acid and Hydrogen Peroxide

Ghriss,

Ben Amor,

Jeday

et al. 2024

Period. Polytech. Chem. Eng.

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NOx are harmful pollutants emitted by many industries and must be removed before the gases are released into the atmosphere. Among the various techniques used for NOx removal, reactive absorption by hydrogen peroxide in a packed column has the advantage of being able to transform NOx into nitric acid which can be recycled and reused in the plants. This work aimed at modeling the NOx absorption by means of aqueous solutions of hydrogen peroxide and nitric acid, applied in a packed column operating under different representative conditions. The model established using the Aspen software considers the equilibrium and the kinetics of the reactions taking place both in the gas phase and in the liquid phase as well as the thermodynamic properties of the chemical (molecular and ionic) components estimated using the Electrolyte NRTL model. It allows predicting NOx absorption performances in terms of efficiency and selectivity. The model was validated by comparing simulation results with experimental ones obtained in a pilot-scale absorption column and published previously. The predicted values are in satisfactory agreement with the experimental data showing a deviation between 5 and 8%. Therefore, the model developed in this work could be advantageously used to design industrial-scale reactive NOx absorption columns.

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Section: Model Results and Validationmentioning

confidence: 99%

Section: Selection Of Thermodynamic Model For the Liquid Phasementioning

confidence: 99%