internal diffusion

internal diffusion

[in′tərn·əl di′fyü·zhən]
(chemical engineering)
The diffusion of liquid or gaseous reactants to the innermost pore depths of an adsorbent-base catalyst, necessary for full catalytic effect.
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Formaldehyde emission from wood composites includes mainly three mass transport processes: (1) the internal diffusion process: the diffusion of formaldehyde from inside the wood composites to the surface; (2) the thermodynamic equilibrium process: absorption and stripping of formaldehyde between the air and the source interface; and (3) the convection transfer process: the diffusion of formaldehyde from the source boundary layer to the air.
In general, porous adsorbents show many steps in adsorption process [20]; such as, a) Internal diffusion, b) External diffusion and c) Surface diffusion.
The tradeoff between a battery's useful power and energy capacity is partly the result of internal diffusion dynamics.
Leaf internal diffusion conductance limits photosynthesis more strongly in older leaves of Mediterranean evergreen broad-leaved species.
1 from the refractive index of the acrylate binder resin, based on the weight of acrylate binder resin, and wherein the internal diffusion haze of the film ranges from 15-40 and surface haze of the film is less than 15.
m1]) and it becomes analogous to the internal diffusion resistance (L/[D.
To gauge the influence of knowledge diffusion on economic growth, this study proposes that VC provides an internal diffusion channel in addition to the external diffusion channel for enhancing TFP growth.
If we form a mental picture of the internal diffusion pathway through an O-ring as a capillary tube that's hundreds of meters long and crumpled into a ball, we can easily see that the permeating gases will not follow the net flow picture of a flow vector from atmosphere through the bulk and into the vacuum space.
The internal diffusion model can better describe their growth.
Table 7 shows respondent ratings of barriers to internal diffusion of EDI.
Hypothesis 3: Internal diffusion and temporal coverage increase over the four levels of matrix complexity.

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