Kinetics of Adsorption

Question 1

Define the terms in the LDF equation

Answer 1

Mt = amount adsorbed in time (g/s)
Me = equilibrium uptake (g)
k = rate constant (s^-1)

Question 2

Arhenius equation

Answer 2

• Arhenius equation - plot lnK vs 1/T, gives Ea

=>Intercept (lnA) - represents no .of. components with that Ea

Question 3

Define competitive adsorption

Answer 3

Two or more gas phase species adsorbing on the same surface; one species adsorbed, other blocked or displaced

Question 4

Competitive adsorption model assumptions

Answer 4

Langmuir basis: assumes homogeneous sites, no interactions, localised adsorption, monolayer coverage, each site only holds one molecule of A or B

Question 5

Which model is competitive and dissociative adsorption based on?

Answer 5

Langmuir

Question 6

Dissociative adsorption model assumptions

Answer 6

Langmuir basis: assumes homogeneous sites, no interactions, localised adsorption, monolayer coverage, each site only holds one X