Toward gas-phase controlled mass transfer in micro-porous membrane contactors for recovery and concentration of dissolved methane in the gas phase

A mathematical model for nitrification in an aerated fixed bed reactor has been developed. This model is based on material balances in the bulk liquid, gas phase and in the biofilm area. The fixed bed is divided into a number of cells according to the reduced remixing behaviour. A fixed bed cell consists of 4 compartments: the support, the gas phase, the bulk liquid phase and the stagnant volume containing the biofilm. In the stagnant volume the biological transmutation of the ammonia is located. The transport phenomena are modelled with mass transfer formulations so that the balances could be formulated as an initial value problem. The results of the simulation and experiments are compared.

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Modelling of cross-flow membrane contactors: Mass transfer with chemical reactions

Journal of Membrane Science ◽

10.1016/j.memsci.2005.01.042 ◽

2005 ◽

Vol 255 (1-2) ◽

pp. 275-289 ◽

Cited By ~ 58

Author(s):

V DINDORE ◽

D BRILMAN ◽

G VERSTEEG

Keyword(s):

Mass Transfer ◽

Chemical Reactions ◽

Cross Flow ◽

Membrane Contactors

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Performance of packed columns: V. Effect of solute concentration on gas-phase mass transfer rates

AIChE Journal ◽

10.1002/aic.690050308 ◽

1959 ◽

Vol 5 (3) ◽

pp. 290-294 ◽

Cited By ~ 9

Author(s):

H. L. Shulman ◽

L. J. Delaney

Keyword(s):

Mass Transfer ◽

Gas Phase ◽

Solute Concentration ◽

Packed Columns ◽

Transfer Rates

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Analysis of Heat and Mass Transfer Between a Desiccant-Air System in a Packed Tower

Journal of Solar Energy Engineering ◽

10.1115/1.3268198 ◽

1987 ◽

Vol 109 (2) ◽

pp. 89-93 ◽

Cited By ~ 59

Author(s):

P. Gandhidasan ◽

M. Rifat Ullah ◽

C. F. Kettleborough

Keyword(s):

Mass Transfer ◽

Gas Phase ◽

Heat And Mass Transfer ◽

Packing Material ◽

Mass Transfer Resistance ◽

Liquid Desiccant ◽

Governing Equations ◽

Packed Tower ◽

Transfer Resistance ◽

Steady State Model

Heat and mass transfer analysis between a desiccant-air contact system in a packed tower has been studied in application to air dehumidification employing liquid desiccant, namely calcium chloride. Ceramic 2 in. Raschig rings are used as the packing material. To predict the tower performance, a steady-state model which considers the heat and mass transfer resistances of the gas phase and the mass transfer resistance of the liquid phase is developed. The governing equations are solved on a digital computer to simulate the performance of the tower. The various parameters such as the effect of liquid concentration and temperature, air temperature and humidity and the rates of flow of air and liquid affecting the tower performance have been discussed.

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