Langmuir adsorption constant

As every surface complex formation equilibrium constant can be converted into an equivalent Langmuir adsorption constant (Stumm et al., 1970), every FFG equation reflects the surface complex formation constant corrected with the interaction coeffi-... 

In Eq. (5.40), and Y2 are Langmuir adsorption constants. Their values are characteristic of each specific system. We can then distinguish two regions of adsorption. One defined as ideal, where 1 > [BH]/ J2, yielding... 

Xu Y, Langford CH. Variation of Langmuir adsorption constant determined for Ti02-photocatalyzed degradation. J Photochem Photobiol A Chem 2000 133 67-71. 

Apparent rate constant in LH expression The Langmuir adsorption constant (L moH )... 

The conditions for the validity of a Langmuir type adsorption equilibrium are (1) equilibrium up to the formation of a monolayer, 0 = 1 and (2) an energy of adsorption that is independent of 0 (i.e., equal activity of all surface sites). There is no difference between a surface complex formation constant and a Langmuir adsorption constant (see Example 9.1b). 

The dimensionless group y is given by the ratio of bulk inhibitor concentration to the Langmuir adsorption constant. In the absence of consumption or competition from the adsorbed metal intermediate, y = 1 corresponds to an inhibitor coverage of 0.5. Thus significant inhibition is expected when Cj, > K(y>l). 

Example 5.6 Fitting Langmuir adsorption constants to CO data... 

In the equation, a, b are Langmuir adsorption constant (mVt, MPa" ), p is the internal gas pressure of coal particle (MPa), Q is coal particle gas content of unit mass (mVt). 

P is the gas pressure or concentration of the adsorbate, a is the Langmuir adsorption constant, and 0 is the percent of surface covered. The constant a decreases as the temperature increases and is dependent on the specific binding energy of the adsorbate (different adsorbates have different binding energies). 

Langmuir Adsorption Constants and Surface Area Occupied by Cr(lll) Ions on Different Activated Carbons... 

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