Determination of effective diffusivities and convective coefficients of CO 2 in gypsum plasters by dynamic single pellet experiments

2016 ◽  
Vol 105 ◽  
pp. 164-171 ◽  
Author(s):  
Mehmet Kalender
Keyword(s):  
Single Pellet ◽  
Effective Diffusivities

Extra-Column Effects in Determination of Rate Parameters by the Chromatographic Method

1996 ◽  
Vol 61 (6) ◽  
pp. 844-855 ◽  
Author(s):  
Olga Šolcová ◽  
Petr Schneider
Keyword(s):  
Chromatographic Method ◽  
Dynamic Method ◽  
Axial Dispersion ◽  
Transport Parameters ◽  
Porous Particles ◽  
Loop Detector ◽  
Single Pellet ◽  
Set Up ◽  
Extra Column Effects

It was shown that the sampling loop, detector and connecting elements in the chromatographic set-up for determination of transport parameters by the dynamic method significantly influence the response peaks from columns packed with porous or nonporous particles. A method, based on the use of convolution theorem, was developed which can take these effects into account. The applicability of this method was demonstrated on the case of axial dispersion in a single-pellet-string column (SPSR) packed with nonporous particles. It is possible to handle also responses from columns packed with porous particles by a similar procedure.

scholarly journals Drying Kinetics, Texture, Color, and Determination of Effective Diffusivities During Sun Drying of Chempedak

2008 ◽  
Vol 26 (10) ◽  
pp. 1286-1293 ◽  
Author(s):  
Chien Hwa Chong ◽  
Chung Lim Law ◽  
Michael Cloke ◽  
Luqman Chuah Abdullah ◽  
Wan Ramli Wan Daud
Keyword(s):  
Drying Kinetics ◽  
Sun Drying ◽  
Effective Diffusivities

Determination of the Porosity, Permeability and Diffusivity of Rock in the Excavation-Disturbed Zone Around Full-Scale Deposition Holes Using the He-Gas Method

1999 ◽  
Vol 556 ◽  
Author(s):  
J. Autio ◽  
J. Timonen ◽  
T. Aaltonen ◽  
M. Laajalahti ◽  
K. Kuoppamäki ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
Granitic Rock ◽  
Nuclear Waste Repository ◽  
Direction Parallel ◽  
Disturbed Zone ◽  
Excavation Disturbed Zone ◽  
Waste Repository ◽  
Effective Diffusivities ◽  
Scale Deposition

AbstractIn a nuclear waste repository, rock in the excavation-disturbed zone adjacent to the walls of deposition holes for waste canisters is a potential pathway for the transport of corrosive agents and radionuclides. Three experimental holes the size of deposition holes in a KBS-3 type repository (depth 7.5 m and diameter 1.5 m) were bored in hard granitic rock in the Research Tunnel at Olkiluoto and the porosities, effective diffusivities and permeabilities of rock in the excavation-disturbed zone were determined in a direction parallel to the disturbed surface using He-gas methods. Permeability and diffusivity in a direction parallel to the rock schistosity was found to be clearly larger than in a direction perpendicular to it.

Theoretical and experimental approaches towards the determination of solute effective diffusivities in foods

2005 ◽  
Vol 37 (1) ◽  
pp. 29-41 ◽  
Author(s):  
Theodoros H. Varzakas ◽  
Gareth C. Leach ◽  
Cleanthes J. Israilides ◽  
Dimitrios Arapoglou
Keyword(s):  
Experimental Approaches ◽  
Effective Diffusivities
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