Investigation of mass transfer through inorganic membranes with several layers

Packed‐Bed Membrane Reactors

“…Thus, the concept of decreasing the local oxygen concentration by distributed dosing to avoid series reactions forming CO and CO 2 has proven to be successful applying ceramic membranes. For further information see Hamel et al , 2003 ;Thomas, Klose, and Seidel -Morgenstern, 2001 .…”

Asymmetry effects in membrane catalysis

“…Hydrogen productivity in methanol conversion process dependent on membrane porous structure and orientation (T = 300 8C, feeding Ar flux was 80 cm 3 / min, methanol feeding is 0.1 cm 3 /min, under total feed pressure 1.3-1.7 bar). for multilayer porous membranes was observed, recently [13], with gas permeance differences 3-10%. It is explained by consideration of the boundary conditions.…”

“…The temperature of the gas in the membrane diffusion cell is controlled by using the thermocouple [7] of the thermostat. Two manometers are used to control gas pressure: before and after the membrane [4,13]. Gas permeation through the membrane [6] was measured by flow meter [9].…”

“…The scheme of membrane diffusion cell which consists of: source of gas (1, 2), dryer (3), manometers(4,13), diffusion cell…”

Mass transfer simulation on pervaporation dehydration of ethanol through hollow fiber NaA zeolite membranes

“…In this work, the DGM consisting in Knudsen diffusion and viscous flow mechanisms was adopted to describe the mass transfer of permeate molecules through porous hollow fiber support. [24][25][26] The flux of the components i in Knudsen region is described by Eq. 14…”