Energy & environment materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 22, 2025
The
efficiency
of
carbon
dioxide
(CO
2
)
adsorption
in
carbonaceous
materials
is
primarily
influenced
by
their
microporosity
and
thermodynamic
affinity
for
CO
.
However,
achieving
optimal
heteroatom
doping
precise
micropore
engineering
through
advanced
activation
techniques
remains
a
significant
challenge.
We
introduce
solvent‐free
one‐pot
method
using
polythiophene,
melamine,
KOH
to
prepare
highly
microporous,
heteroatom‐
co
‐doped
carbons
(NSC).
This
approach
leverages
sulfur
from
nitrogen
the
agent
enhance
capture
performance.
Our
results
demonstrate
that
optimized
sample,
NSC‐800,
achieves
capacity
280.5
mg
g
−1
at
273
K
1
bar,
attributed
its
high
(6.5
at.%)
(3.4
contents,
specific
surface
area
2888
m
,
volume
1.685
cm
3
moderate
isosteric
heat
(27.7
kJ
mol
indicates
physisorption‐driven
mechanism,
as
confirmed
close
alignment
with
pseudo‐first‐order
polynomial
model
(
R
>
0.99)
across
temperatures
303–323
K.
study
reveals
NSC‐800
also
displays
efficient
regeneration
after
ten
cycles
adsorption–desorption
under
flue
gas
conditions
(15%
85%
N
313
K),
highlighting
potential
regenerable,
energy‐efficient
adsorbent
practical
applications.
Industrial & Engineering Chemistry Research,
Journal Year:
2024,
Volume and Issue:
63(13), P. 5863 - 5870
Published: March 21, 2024
Zeolites
are
promising
materials
for
CO2
adsorption,
yet
they
still
face
the
challenges
of
low
adsorption
capacity
and
selectivity.
Herein,
we
report
a
strategy
grafting
ethylenediamine
to
Co-exchanged
Y
zeolite
improve
via
strong
interactions
between
Co2+
amine
groups.
Functionalization
with
amines
(Co-Y-EN)
enables
significant
improvement
in
(4.36
mmol/g
at
1
bar
298
K),
which
is
1.73
times
higher
than
that
pristine
Na-Y
zeolite.
Moreover,
Co-Y-EN
demonstrates
enhanced
selectivity,
as
confirmed
by
both
single-component
gas
experiments
breakthrough
tests.
The
superior
selectivity
attributed
affinity
sites
molecules,
well
optimized
pore
sizes
adsorption.
Overall,
this
study
presents
straightforward
approach
enhancing
performance
materials.
Cell Reports Physical Science,
Journal Year:
2024,
Volume and Issue:
5(4), P. 101889 - 101889
Published: March 26, 2024
Materials
with
tunable
properties
are
crucial
for
mitigating
CO2
emissions.
Here,
uniform
and
well-structured
porous
Rubik's
cube-shaped
Linde
type
A
(LTA)
zeolites
synthesized
capture,
representing
advancement
in
eco-friendly
cost-effective
materials.
The
synthesis
procedure
extracts
melting
silicon
from
silicon-rich
biomass
ashes,
followed
by
template-free
hydrothermal
synthesis.
approach
is
proposed
to
collect
high
hydroxide
anion
concentration
outstanding
flowability,
accelerating
reaction
kinetics
yielding
alkaline
silicon-containing
solutions
promote
crystallization
of
zeolites.
These
possess
sorption
capacity
(2.97
mmol/g
at
1
bar
298
K)
selectivity
CO2/N2
(around
255.1),
influenced
ultramicropores
heterogeneous
surfaces
containing
metal
ions.
Cyclic
robustness
during
vacuum
temperature
swing
cycles
displays
a
low
attenuation
rate
(approximately
7.7%
over
20
cycles).
Thus,
LTA
promising
addressing
capture
challenges
leveraging
readily
available
Langmuir,
Journal Year:
2023,
Volume and Issue:
39(44), P. 15535 - 15546
Published: Oct. 25, 2023
The
adsorption
equilibria
and
kinetic
performance
of
CO2,
CH4,
N2
on
pelletized
cation-exchanged
faujasite
zeolites
(with
alkali,
alkaline
earth,
transition
metal
ions)
have
been
investigated
by
an
innovative
volumetric
apparatus
simultaneously.
standard
instrumental
analytical
techniques,
including
X-ray
diffraction,
field
emission
scanning
electron
microscopy,
energy
dispersive
spectroscopy
(EDX),
atomic
absorption
(AAS),
were
utilized
to
characterize
binder-free
modified
zeolites.
EDX
AAS
analyses
revealed
that
the
ion
exchange
was
successfully
achieved.
results
indicate
type
cation
present
in
zeolite
framework
Si/Al
ratio
can
a
significant
impact
capacity
performance.
obtained
isotherms
determined
three
isotherm
models,
Langmuir-Freundlich
(Sips)
model
found
show
best
agreement
with
experimental
data
for
all
gases.
CO2
uptakes
KX,
MgX,
CaX
reached
4.13,
4.79,
5.48
mmol/g,
respectively.
effective
binary
selectivities
CO2/CH4
CO2/N2
also
calculated.
Among
samples,
KX
showed
highest
54.46
91.62,
Pseudo-first-,
pseudo-second-order,
Avrami
models
fitted
analyze
kinetics.
Finally,
macropore
diffusion
coefficient
(Dp)
microporous
diffusional
time
constant
(Dc/rc2)
estimated
correlating
micropore-macropore
fractional
uptake
curves.
ion-exchanged
K+
form
exhibits
suitable
terms
behavior
capacity.
