Some considerations on mass-transfer resistances in solution—diffusion-type membrane processes

1994 ◽  
Vol 87 (1-2) ◽  
pp. 171-180 ◽  
Author(s):  
R. Rautenbach ◽  
F.P. Helmus
Keyword(s):  
Mass Transfer ◽  
Diffusion Type ◽  
Membrane Processes

Thermodynamics and membrane processes

1982 ◽  
Vol 15 (4) ◽  
pp. 667-759 ◽  
Author(s):  
Roger A. Klein
Keyword(s):  
Mass Transfer ◽  
Electron Transfer ◽  
Biological Membranes ◽  
Irreversible Thermodynamics ◽  
Personal View ◽  
Membrane Processes ◽  
Transfer Processes ◽  
Mass Transfer Processes

This review represents a personal view of membrane thermodynamics. I do not intend to deal at all with the irreversible thermodynamics of membrane mass transfer processes. This aspect has been covered far more competently and completely by other people (Bittar, 1970; Paterson, 1970; Rottenberg, Caplan & Essig, 1970; Mitchell, 1970; Rothschild et al. 1980; Oster, Perelson & Katchalsky, 1973; Kedem & Katchalsky, 1958; Schwartz, 1971). The recent review on osmosis by Hill (1979) is a particularly succinct appraisal of a facet of irreversible membrane thermodynamics. Arata & Nishimura (1980) have considered the coupling of electron transfer to vectorial processes in biological membranes.

Mass Transfer: Membrane Processes

2006 ◽  
pp. 145-178
Author(s):  
David Hughes ◽  
Taha Taha ◽  
Cui Zhanfeng
Keyword(s):  
Mass Transfer ◽  
Membrane Processes

Heat and Mass Transfers and their Mutual Effects in Membrane Processes

2010 ◽  
Vol 297-301 ◽  
pp. 676-681
Author(s):  
J.C. Min ◽  
M. Su
Keyword(s):  
Mass Transfer ◽  
Water Vapor ◽  
Thermal Resistance ◽  
Heat And Mass Transfer ◽  
Vapor Concentration ◽  
Moisture Resistance ◽  
Water Vapor Concentration ◽  
Membrane Processes ◽  
Concentration Difference ◽  
Mass Transfers

A mathematical model was developed to describe the coupled heat and mass transfers in membrane processes. Equations for the heat and mass transfer resistances were derived and the coupling effects of the heat and mass transfer were analyzed. With taking the membrane separation process of moist air as an example, the effects of air temperature and water vapor concentration on the heat and moisture transfer process were investigated. The results show that neither the thermal resistance nor the moisture resistance are constant, they are affected by not only the membrane parameters but also the air state. As the temperature difference between the two airstreams separated by the membrane increases, both the thermal and moisture resistances decrease, causing an improved heat and mass transfer. As the average temperature of the two airstreams increases, the thermal resistance remains almost constant while the moisture resistance decreases significantly. Further, as the water vapor concentration difference between the two airstreams increases, both the thermal and moisture resistances increase. As the average water vapor concentration of the two airstreams increases, the thermal resistance remains unchanged while the moisture resistance decreases.

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