Physical Characterisation of Catalysts
Key Techniques
Micropore Analysis: pore size, area and volume in the micropore range
Micropore Analysis: choice of adsorbate for ultra-micropore characterisation
Gas Adsorption: pore size, area and volume in the mesopore range
Gas Adsorption: BET Surface Area
Mercury Porosimetry: pore size, area and volume in meso & macropore ranges
Mercury Intrusion / Extrusion Porosimetry: cavity to throat size
Chemisorption: active metal surface area and dispersion measurement
Permeability and Tortuosity: measurement by mercury intrusion porosimetry
Temperature Programmed Methods: reduction, oxidation & desorption
Density Measurement: absolute density, bulk density and skeletal density
MCA
Services
offers
a
complete
suite
of
techniques
for
the
physical
characterisation
of
catalyst
systems.
The
combination
of
mercury
porosimetry
and
gas
adsorption
provides
characterisation
throughout
the
pore
size
range,
from
ultra-micropores
through
to
macro-pores
with
a
maximum
size
of
~
650
µm.
Mercury
porosimetry
can
be
extended
to
consider
extrusion
analysis
for
consideration
of
pore
geometry
as well as permeability and tortuosity determination.
Most
gas
adsorption
options
also
include
the
calculation
of
BET
surface
area
as
standard.
Whilst
nitrogen
adsorption
is
the
most
commonly
applied
technique,
alternatives
are
available
for
more
specialised
analyses.
For
example
carbon
dioxide
for
ultra-micropores
with
the
capability
of
combination
with
nitrogen
adsorption
to
complete
a
single,
harmonious,
pore
size
distribution.
Argon
adsorption
is
available
for
micro-porous
materials
proving
problematic
for
nitrogen
adsorption,
for
example
those
with
charged
surface
species
such
as
zeolites
and
organic frameworks.
Chemisorption
(chemical
adsorption)
is
routinely
applied
to
the
analysis
of
active
metal
constituents
to
determine
their
availability
for
a
desired
catalytic
reaction.
Active
metal
dispersion,
surface
area
and
crystallite
size
are
commonly
applied
and
at
MCA
Services
we
offer
measurements
using
both
static
and
dynamic
methods.
Hydrogen
and
carbon
monoxide
sorption
represent
the
most
common
approach
but
we
also
offer
more
specialised
options,
for
example
nitrous
oxide
and
ammonia
to
ensure
that
the
majority
of
active
metals
and
loadings
can
be
analysed
with
confidence.
Alongside
chemisorption,
our
Temperature
Programmed
options
provide
analyses
for
reduction,
oxidation
and
desorption,
completing
the
characterisation
and
understanding
of
active
constituents.
All
are
applicable
to
new
and
spent
catalyst
materials
and
are
particularly
useful
when
considering
the
development or assessment of a system, its performance and its regeneration.
MCA
Services
offers
a
complete
suite
of
techniques
for
the
characterisation
of
material
porosity
throughout
the
range
of
micropores,
through
mesopores
and
macropores.
We
also
have
extensive
experience
and
expertise
to
actively
assist
with
the
interpretation
of
results,
relating
porous
characteristics
to
the
sample
material
and
its
ultimate
application
in
a
battery
system.
Combined
with
state-of-
the-art
instrumentation
and
software,
offering
flexible
and
extensive
reporting
options,
we
help
to
maximise
the
amount
of
high
quality
data
describing
sample
materials.
The
significance
and
influence
of
the
porous
nature
of
catalyst
systems
with
respect
to
their
functionality,
performance
and
efficiency
is
well
known,
as
is
the
understanding
of
the
physico-chemical
properties
of
the
active
constituents.
Characterisation
of
the
porous
nature
of
catalysts
can
be
applied
to
the
active
constituents,
support
materials
or
the
finished
system.
Understanding
the
porous
and
active
nature
of
catalysts
is
vital to both un-used and spent materials and also to considering degradation and the regeneration process.
Tel: 01763 262333
Key Techniques.
Micropore Analysis: pore size, area and volume determination
in the micropore range.
Micropore Analysis: wide choice of adsorbate gases for ultra-
micropore characterisation.
Gas Adsorption: pore size, area and volume determination in
the mesopore range.
Gas Adsorption: BET Surface Area.
Mercury Porosimetry: pore size, area and volume
determination in meso & macropore ranges.
Mercury Intrusion / Extrusion Porosimetry: cavity to throat
size determination.
Chemisorption: active metal surface area and dispersion
measurement – static and dynamic methods.
Permeability and Tortuosity: measurement by mercury
intrusion porosimetry.
Temperature Programmed Methods: reduction, oxidation,
adsorption & desorption.
Density Measurement: absolute density, bulk (envelope)
density and skeletal density
MCA
Services
offers
a
complete
suite
of
techniques
for
the
physical
characterisation
of
catalyst
systems.
The
combination
of
mercury
porosimetry
and
gas
adsorption
provides
characterisation
throughout
the
pore
size
range,
from
ultra-
micropores
through
to
macro-pores
with
a
maximum
size
of
~
650
µm.
Mercury
porosimetry
can
be
extended
to
consider
extrusion
analysis
for
consideration
of
pore
geometry
as
well
as
permeability and tortuosity determination.
Most
gas
adsorption
options
also
include
the
calculation
of
BET
surface
area
as
standard.
Whilst
nitrogen
adsorption
is
the
most
commonly
applied
technique,
alternatives
are
available
for
more
specialised
analyses.
For
example
carbon
dioxide
for
ultra-
micropores
with
the
capability
of
combination
with
nitrogen
adsorption
to
complete
a
single,
harmonious,
pore
size
distribution.
Argon
adsorption
is
available
for
micro-porous
materials
proving
problematic
for
nitrogen
adsorption,
for
example
those
with
charged
surface
species
such
as
zeolites
and
organic frameworks.
Chemisorption
(chemical
adsorption)
is
routinely
applied
to
the
analysis
of
active
metal
constituents
to
determine
their
availability
for
a
desired
catalytic
reaction.
Active
metal
dispersion,
surface
area
and
crystallite
size
are
commonly
applied
and
at
MCA
Services
we
offer
measurements
using
both
static
and
dynamic
methods.
Hydrogen
and
carbon
monoxide
sorption
represent
the
most
common
approach
but
we
also
offer
more
specialised
options,
for
example
nitrous
oxide
and
ammonia
to
ensure
that
the
majority
of
active
metals
and
loadings
can
be
analysed
with
confidence.
Alongside
chemisorption,
our
Temperature
Programmed
options
provide
analyses
for
reduction,
oxidation
and
desorption,
completing
the
characterisation
and
understanding
of
active
constituents.
All
are
applicable
to
new
and
spent
catalyst
materials
and
are
particularly
useful
when
considering
the
development
or
assessment of a system, its performance and its regeneration.
MCA
Services
offers
a
complete
suite
of
techniques
for
the
characterisation
of
material
porosity
throughout
the
range
of
micropores,
through
mesopores
and
macropores.
We
also
have
extensive
experience
and
expertise
to
actively
assist
with
the
interpretation
of
results,
relating
porous
characteristics
to
the
sample
material
and
its
ultimate
application
in
a
battery
system.
Combined
with
state-of-the-art
instrumentation
and
software,
offering
flexible
and
extensive
reporting
options,
we
help
to
maximise
the
amount
of
high
quality
data
describing
sample materials.
Physical Characterisation of Catalysts
The
significance
and
influence
of
the
porous
nature
of
catalyst
systems
with
respect
to
their
functionality,
performance
and
efficiency
is
well
known,
as
is
the
understanding
of
the
physico-
chemical
properties
of
the
active
constituents.
Characterisation
of
the
porous
nature
of
catalysts
can
be
applied
to
the
active
constituents,
support
materials
or
the
finished
system.
Understanding
the
porous
and
active
nature
of
catalysts
is
vital
to
both
un-used
and
spent
materials
and
also
to
considering
degradation and the regeneration process.
