Slow light enhanced gas absorption by a factor of 5.8 in is experimentally demonstrated at 5400 nm.
The results for concentration profile, gas absorption rate, and enhancement factor are presented for various reaction rate and mass transfer resistance parameters.
A mathematical model which is capable of predicting gas absorption rates and enhancement factors from chemical reaction kinetics, system hydrodynamics, and physical properties was developed.
Enhancement factors for gas absorption with autocatalytic reaction and simultaneous desorption of the catalyst have been calculated for the film and the penetration model.
The enhancement factor for the gas absorption with the two-step reversible and irreversible consecutive reaction, 2A⇌A*+A and A*+B→P in the film theory was derived by using the Van Krevelen approximation, and was compared with the exact numerical solution.
Experiments have been carried out in a packed column to test the hypothesis that the interfacial area effective for gas absorption with chemical reaction depends on γ, where γ = factor by which reaction increases capacity of absorbentfactor by which reaction increases rate of absorption.
A volume-element model based on the film theory for reactive gas absorption was developed and novel, explicit analytical relations for the enhancement factors for both gases will be provided.
In the case of gas absorption with accompanying chemical reaction, the absorption rate is influenced by temperature primarily because of two opposing factors: decrease in gas solubility and increase in reaction rate (for irreversible reaction) as the temperature is increased.
Increasing pressure and lowering temperature maximize gas absorption.
Second, the alveoli form a huge surface for gas absorption.
