Tel: 01763 262333
Specific Surface Area (BET Area) by Nitrogen and Krypton Adsorption
The
surface
area
of
a
material
will
often
profoundly
affect
its
behaviour
and
performance,
whatever
its
application.
Therefore,
understanding
surface
area
is
commonly
a
critical
parameter
when
considering
materials
procurement,
processing
and
fabrication,
assessment
of
performance
and
investigation
of
atypical
performance
and
product
failure.
Specific
surface
area
can
be
used
to
directly
determine
many
factors,
such
as
reactivity,
adsorption
capacity,
dissolution
rate,
electrochemical
and
catalytic
performance
and
sintering
ability.
Specific
surface
area
is
commonly
measured
using
the
BET
(Brunauer-Emmett-Teller)
method
applied
to
a
gas
adsorption
isotherm.
For
the
majority
of
materials
nitrogen
gas
adsorption
is
applied,
which
can
be
combined
with
the
more
extensive
full
isotherm
analysis
to
determine
pore
size
and
volume
characteristics.
However,
for
very
low
surface
area
materials
krypton
gas
adsorption
becomes
more
reliable
and
can
be
used
to
determine
surface area very close to the geometric area of a non-porous sample material.
The
combination
of
nitrogen
and
krypton
adsorption
methods
provides
MCA
Services
with
the
capability
of
accurately
measuring
materials
with
specific surface areas below 0.05 m
2
/g to over 2000 m
2
/g.
Key Applications
Surface area directs the interaction of a solid with other media
Surface Area is a critical factor for:
Material selection
Processing and fabrication method development
Routine QC of raw materials and finished products
Performance assessment of products and materials
Identification of performance issues
Product capacity and life-cycle
Product regeneration
Assessment of chemical activity
Comprehensive degassing options to cover most sample materials
Alternative adsorbate options
At
MCA
Services
sample
analysis
is
undertaken
using
our
Micromeritics
TriStar
3030
plus
instrument,
which
utilises
the
volumetric
method
of
gas
adsorption.
Before
analysis
it
is
essential
that
samples
are
fully
dried
and
degassed
as
extraneous
substances
will
provide
an
artificially
low
surface
area
value.
We
have
a
comprehensive
range
of
degassing
options,
capable
of
temperatures
in
the
range
ambient
to
400
°C
under
dynamic
vacuum
or
flowing
inert
gas.
We
can,
therefore,
prepare
virtually
any
sample
material
on-site
immediately
prior
to
analysis,
which
ensures the most accurate and reliable measurements are obtained.
At
MCA
Services
sample
analysis
is
undertaken
using
our
Micromeritics
TriStar
3030
plus
instrument,
which
utilises
the
volumetric
method
of
gas
adsorption.
Before
analysis
it
is
essential
that
samples
are
fully
dried
and
degassed
as
extraneous
substances
will
provide
an
artificially
low
surface
area
value.
We
have
a
comprehensive
range
of
degassing
options,
capable
of
temperatures
in
the
range
ambient
to
400
°C
under
dynamic
vacuum
or
flowing
inert
gas.
We
can,
therefore,
prepare
virtually
any
sample
material
on-site
immediately
prior
to
analysis,
which
ensures the most accurate and reliable measurements are obtained.
Analytical Options and Highlights
Multi-point BET surface area measurement
Single-point BET surface area option available
N
2
and Kr adsorption options cover virtually any surface area
Reliable low pressure data applicable to highly micro-porous samples
Comprehensive sample preparation and degassing options
Highly adaptable methods to suit and match historical data
Numerical and graphical reporting format
Options to extend to full isotherm analysis
At
MCA
Services
we
have
decades
of
experience
in
the
analysis
and
characterisation
of
materials
and
are
always
happy
to
discuss
specific
samples
and
applications.
Our
expertise
ensures
that
the
most
appropriate
analytical
test,
or
combination
of
tests,
are
selected
for
your
particular
sample,
application
and
requirements.
We
also
provide
assistance
with
the
interpretation
of
results
and
more
information
about
these
analytical options and the background operation and theory can be found on our YouTube channel.
Specific Surface Area (BET Area)
Nitrogen and Krypton Gas Adsorption
The
surface
area
of
a
material
will
often
profoundly
affect
its
behaviour
and
performance,
whatever
its
application.
Therefore,
understanding
surface
area
is
commonly
a
critical
parameter
when
considering
materials
procurement,
processing
and
fabrication,
assessment
of
performance
and
investigation
of
atypical
performance
and
product
failure.
Specific
surface
area
can
be
used
to
directly
determine
many
factors,
such
as
reactivity,
adsorption
capacity,
dissolution
rate,
electrochemical
and
catalytic
performance
and
sintering
ability.
Specific
surface
area
is
commonly
measured
using
the
BET
(Brunauer-Emmett-
Teller)
method
applied
to
a
gas
adsorption
isotherm.
For
the
majority
of
materials
nitrogen
gas
adsorption
is
applied,
which
can
be
combined
with
the
more
extensive
full
isotherm
analysis
to
determine
pore
size
and
volume
characteristics.
However,
for
very
low
surface
area
materials
krypton
gas
adsorption
becomes
more
reliable
and
can
be
used
to
determine
surface
area
very
close to the geometric area of a non-porous sample material.
The
combination
of
nitrogen
and
krypton
adsorption
methods
provides
MCA
Services
with
the
capability
of
accurately
measuring
materials
with
specific
surface
areas
below
0.05
m
2
/g
to over 2000 m
2
/g.
Key Applications
Surface area directs interactions of solids with other media
Surface Area is a critical factor for:
Material selection
Processing and fabrication method development
Routine QC of raw materials and finished products
Performance assessment of products and materials
Identification of performance issues
Product capacity and life-cycle
Product regeneration
Assessment of chemical activity
Comprehensive degassing options
Alternative adsorbate options
At
MCA
Services
sample
analysis
is
undertaken
using
our
Micromeritics
TriStar
3030
plus
instrument,
which
utilises
the
volumetric
method
of
gas
adsorption.
Before
analysis
it
is
essential
that
samples
are
fully
dried
and
degassed
as
extraneous
substances
will
provide
an
artificially
low
surface
area
value.
We
have
a
comprehensive
range
of
degassing
options,
capable
of
temperatures
in
the
range
ambient
to
400
°C
under
dynamic
vacuum
or
flowing
inert
gas.
We
can,
therefore,
prepare
virtually
any
sample
material
on-site
immediately
prior
to
analysis,
which
ensures
the
most
accurate
and reliable measurements are obtained.
Analytical Options and Highlights
Multi-point BET surface area measurement
Single-point BET surface area option available
N
2
and Kr adsorption options for virtually any surface area
Low pressure data applicable to micro-porous samples
Comprehensive sample preparation and degassing options
Highly adaptable methods to suit and match historical data
Numerical and graphical reporting format
Extension to full isotherm analysis
At
MCA
Services
we
have
decades
of
experience
in
the
analysis
and
characterisation
of
materials
and
are
always
happy
to
discuss
specific
samples
and
applications.
Our
expertise
ensures
that
the
most
appropriate
analytical
test,
or
combination
of
tests,
are
selected
for
your
particular
sample,
application
and
requirements.
We
also
provide
assistance
with
the
interpretation
of
results
and
more
information
about
these
analytical
options
and
the
background
operation
and
theory
can
be
found
on
our
YouTube channel.
