Freundlich Isotherm - Micromeritics ASAP 2460 Operator's Manual

Appendix C
Quantity of the Monolayer (cm
1
-- -
Q =
m
S
Langmuir b Value:
b = Y V
int
Error of the Langmuir Surface Area (m
LAN =
err

Freundlich Isotherm

The Freundlich isotherm has the form
Q
------- -
= CP
Q
m
where
C =
m =
P =
Q =
Q =
m
The pressure is absolute; typically, m > 1. In terms of quantity adsorbed,
Q = Q CP
m
Taking the log of both sides yields
log Q = log
C-10
3
/g STP):
m
2
/g):
SA S
Lan err
-----------------------
S
1
--- -
m
temperature-dependent constant
temperature-dependent constant
equilibrated collected pressure measured by gauge at temp T
quantity of gas adsorbed
quantity of gas in a monolayer
1
--- -
m
1
--- -
Q C + log P
m
m
ASAP 2460 Operator's Manual
amb
246-42800-01 - Aug 2013