Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(21), P. 21204 - 21218
Published: Oct. 9, 2024
Integrated
carbon
dioxide
capture
and
utilization
(ICCU)
technology
is
being
developed
to
address
the
challenge
of
increasing
atmospheric
CO2
levels.
Dual
function
materials
(DFMs)
are
designed
with
catalytic
adsorbent
components
that
enable
within
a
single
reactor.
In
this
investigation,
we
systematically
evaluated
performance
NiRu-DFMs
incorporating
oxides
Ca,
Na,
or
combination
identify
effects
on
both
activity
selectivity.
Our
findings
underscore
not
only
role
selection
in
dictating
overall
DFMs
but
also
pretreatment
conditions
(in
situ
reduction).
Notably,
highest
methanation
observed
an
as-synthesized
(oxidized)
10%
Ca-DFM
(223.21
μmol/gDFM)
at
380
°C,
surpassing
all
other
reduced
DFMs.
This
study
sheds
light
relationships
between
composition,
pretreatment,
temperature,
DFMs,
offering
valuable
insights
into
advancement
new
compositions
for
Separation and Purification Technology,
Journal Year:
2023,
Volume and Issue:
326, P. 124866 - 124866
Published: Aug. 22, 2023
Global
warming
and
climate
change
require
urgent
reduction
of
CO2
emissions.
Integrated
carbon
capture
utilisation
combined
with
dry
reforming
methane
(ICCU-DRM)
has
the
potential
to
mitigate
greenhouse
gas
emissions
by
capturing
converting
CH4
into
valuable
syngas.
However,
performance
stability
dual-functional
materials
(DFMs)
are
unclear
under
real-world
flue
conditions,
particularly
in
presence
steam
O2.
In
this
study,
we
elucidated
mechanisms
a
Ni0.05/CaO0.95
DFM
various
conditions
investigated
effects
O2
on
uptake,
CO
H2
yields
cyclic
stability.
Our
approach
includes
synthesis
evaluation
using
advanced
characterisation
techniques,
such
as
XRD,
in-situ
infrared
spectroscopy,
CH4-TPR,
SEM,
EXD,
FIB-SEM,
BET,
XPS,
gain
insights
properties
behaviour
different
conditions.
The
findings
show
that
simulated
condition
(10.0
%
+
6.0
H2O
6.7
O2/N2),
there
was
significant
deterioration
performance,
uptake
only
5.7
mmol.g-1,
average
yield
11
mmol.g-1
6.2
mmol.g-1.
While
ideal
CO2/N2),
were
10.7
16.9
23.1
respectively.
FIB-SEM
XPS
analysis
highlighted
effect
during
ICCU-DRM.
Notably,
promoted
oxidation
Ni,
resulting
decreased
catalytic
activity
volumetric
expansion
Ni
particles.
Furthermore,
adsorption,
inducing
additional
CaO
component
DFM.
These
synergistic
expansions
form
dense
shell
surface,
hindering
internal
NiO,
thereby
diminishing
performance.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 8, 2025
Carbon
capture
and
utilization
involve
multiple
energy-
cost-intensive
steps.
Dual-function
materials
(DFMs)
can
reduce
these
demands
by
coupling
CO2
adsorption
conversion
into
a
single
material
with
two
functionalities:
sorbent
phase
metal
for
catalytic
conversion.
The
role
of
catalysts
in
the
process
seems
salient
from
previous
work,
but
underlying
mechanisms
remain
elusive
deserve
deeper
investigation
to
achieve
maximum
phases.
Here,
preformed
colloidal
Ru
nanoparticles
were
deposited
onto
"NaOx"/Al2O3
prepare
prototypical
DFMs
controlled
phases
hydrogenation
CH4.
addition
was
found
double
high-temperature
capacity
activating
during
reductive
pretreatment
step.
Most
importantly,
low
loadings
sufficient
ensure
This
attributed
key
metal–sorbent
interactions,
wherein
required
hydrogenate
strongly
bound
on
CH4
via
H2
activated
Ru.
interaction
facilitated
rate-determining
carbonate
migration
subsequent
at
interface.
Overall,
reaction
rate,
while
dictated
uptake
capacity.
By
controlling
interactions
molecular
level,
we
demonstrate
critical
their
synergy,
facilitating
design
efficiency.
ChemCatChem,
Journal Year:
2024,
Volume and Issue:
16(15)
Published: April 12, 2024
Abstract
The
massive
emission
of
carbon
dioxide
produces
the
greenhouse
effect
and
poses
a
threat
to
survival
modern
civilization.
search
for
new
management
strategies
has
been
at
forefront
scientific
research
over
past
few
decades.
Integrated
capture
utilization
(ICCU),
which
aims
CO
2
convert
it
in
situ
into
high
value‐added
products
or
fuels,
is
considered
be
more
attractive
innovative
than
alternative
strategies.
This
paper
introduces
adsorption
capacity
characteristics
solid
sorbents
different
operating
temperatures.
On
this
basis,
recent
on
ICCU
technology
combined
with
methanation,
reverse
water−gas
shift
reaction,
dry
reforming
alkanes
dehydrogenation
novel
dual‐function
materials
presented,
development
direction
future
prospects
are
discussed.
Journal of CO2 Utilization,
Journal Year:
2024,
Volume and Issue:
86, P. 102895 - 102895
Published: Aug. 1, 2024
Dual
function
materials
(DFMs)
are
key
for
the
integrated
capture
of
CO2
from
waste
gas
streams
and
its
valorisation
to
valuable
chemicals,
such
as
syngas.
To
be
able
in
commercial
applications,
DFMs
require
both
high
capacity
catalytic
activity,
achieved
by
optimising
synergistic
interactions
among
metals,
support
adsorbent
components.
obtain
increased
interaction,
dry
milling
process
can
used
a
sustainable,
solvent
free,
green
synthesis
method.
In
this
work,
we
report
performance
RuNi
bimetallic
supported
on
CeO2-Al2O3
promoted
with
CaO
Na2O,
synthesised
mild-energy
mechanochemical
process.
The
show
generally
comparable,
sometimes
superior,
activity
Reverse
Water-Gas
Shift
(RWGS)
reaction
CO
production
at
650
°C
compared
their
counterpart
prepared
conventional
impregnation
method,
underlining
potential
method
highly
functional
DFMs.
Remarkably,
stability
also
maintained
when
O2
is
present
step,
indicating
real
exhaust-gases
applications.
Also,
direct
air
reported,
further
benefits
approach
creating
versatile
Separation and Purification Technology,
Journal Year:
2024,
Volume and Issue:
354, P. 129101 - 129101
Published: Aug. 5, 2024
The
design
of
highly
performing
dual
functional
materials
(DFMs)
is
the
key
to
successful
deployment
Integrated
Carbon
Capture
and
Methanation
(ICCM)
process
that
combines
both
steps
into
a
single
unit
operation
with
high
energy
efficiency.
Intending
enhance
CO2
working
capacity
while
preserving
catalytic
methanation
activity,
herein
we
set
out
investigate
effect
combining
Li
Na
as
sorbent
phase
in
Ru/Al2O3
DFMs.
ICCM
tests
fixed
bed
reactor
operated
alternate
feeds
indicated
(or
partially
substituting
it
for
Li)
effectively
increases
capture
methane
production
DFM.
However,
this
generally
requires
higher
temperatures
properly
activate
regenerate
DFM
compared
pure
Li-based
formulation.
Transient
operando
DRIFTS
kinetic
experiments
provided
mechanistic
insights
activation/inhibition
different
reaction
paths
on
those
DFMs
containing
only
and/or
Na.
