Langmuir adsorption isotherm
E459377
The Langmuir adsorption isotherm is a model in surface chemistry that describes how molecules adsorb onto a solid surface to form a monolayer, assuming a fixed number of identical sites with no interactions between adsorbed molecules.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
adsorption isotherm model
ⓘ
physicochemical model ⓘ surface chemistry concept ⓘ |
| appliesTo |
gas–solid adsorption
ⓘ
liquid–solid adsorption ⓘ |
| assumes |
dynamic equilibrium between adsorption and desorption
ⓘ
each site holds at most one adsorbate molecule ⓘ fixed number of adsorption sites ⓘ identical adsorption sites ⓘ localized adsorption at specific sites ⓘ monolayer coverage only ⓘ no interactions between adsorbed molecules ⓘ |
| describes |
adsorption of molecules on solid surfaces
ⓘ
formation of an adsorbed monolayer ⓘ |
| field |
chemical engineering
ⓘ
physical chemistry ⓘ surface chemistry ⓘ |
| generalizedBy |
BET adsorption isotherm
NERFINISHED
ⓘ
Freundlich adsorption isotherm NERFINISHED ⓘ Temkin adsorption isotherm NERFINISHED ⓘ |
| hasLimitation |
assumes homogeneous surface
ⓘ
does not account for adsorbate–adsorbate interactions ⓘ does not describe multilayer adsorption ⓘ less accurate at high surface coverage for real systems ⓘ |
| hasMathematicalForm |
θ = (K C) / (1 + K C)
ⓘ
θ = (K P) / (1 + K P) ⓘ |
| influencedBy |
nature of adsorbate
ⓘ
nature of adsorbent surface ⓘ temperature ⓘ |
| introducedBy | Irving Langmuir NERFINISHED ⓘ |
| namedAfter | Irving Langmuir NERFINISHED ⓘ |
| relatedConcept |
Langmuir–Hinshelwood mechanism
NERFINISHED
ⓘ
adsorption equilibrium constant ⓘ surface coverage ⓘ |
| relates |
surface coverage to adsorbate concentration
ⓘ
surface coverage to adsorbate pressure ⓘ |
| usedIn |
activated carbon adsorption design
ⓘ
adsorption-based separation processes ⓘ biosorption studies ⓘ environmental engineering ⓘ heterogeneous catalysis ⓘ protein adsorption on surfaces ⓘ sensor surface functionalization analysis ⓘ surface reaction kinetics ⓘ |
| usesSymbol |
C for adsorbate concentration in solution
ⓘ
K for Langmuir adsorption equilibrium constant ⓘ P for adsorbate partial pressure ⓘ θ for fractional surface coverage ⓘ |
| yearProposed | 1916 ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.