ChemistryOpen,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 12, 2024
Abstract
Dry
methane
reforming
(DRM)
presents
a
viable
pathway
for
converting
greenhouse
gases
into
useful
syngas.
Nevertheless,
the
procedure
requires
robust
and
reasonably
priced
catalysts.
This
study
explored
using
cost‐effective
cobalt
nickel
combined
single
catalyst
with
different
metal
ratios.
The
reaction
was
conducted
in
fixed
reactor
at
700
°C.
findings
indicate
that
incorporation
of
significantly
enhances
performance
by
preventing
sintering,
improving
dispersion,
promoting
beneficial
metal‐support
interactions.
best‐performing
(3.75Ni+1.25Co‐ScCeZr)
achieved
good
conversion
rate
CH
4
CO
2
46.8
%,
60
%
respectively
after
330
minutes
while
maintaining
stability.
TGA
‐TPD
analysis
results
show
addition
Co
to
Ni
reduces
carbon
formation,
increases
amount
strong
basic
sites
isolated
O
−
species,
total
desorbed.
These
collectively
highlight
potential
cobalt‐nickel
catalysts
practical
DRM
applications
contribute
developing
sustainable
energy
technologies.
Industrial & Engineering Chemistry Research,
Journal Year:
2024,
Volume and Issue:
63(9), P. 3853 - 3866
Published: Feb. 20, 2024
As
a
pathway
to
green
hydrogen,
the
catalytic
dehydrogenation
of
methane
is
an
economical
and
COx-free
alternative
produce
sufficient
volumes
hydrogen
address
energy
sustainability.
This
work
attempts
develop
catalyst
enhance
conversion,
stability,
favorable
carbon
nanostructures.
Monometallic
Fe
catalysts
were
synthesized
on
mesoporous
template
identify
best
synthesis
methodology
covering
incipient
wetness,
hydrothermal,
wet
impregnation
methods.
logical
step
ease
separation
from
product
carbon,
bimetallic
Fe–Mo
was
same
for
first
time,
using
hydrothermal
method,
by
varying
Mo
loading
2.5
15%.
The
optimal
design
had
composition
30%Fe–5%Mo
with
specific
surface
area
606.9
g/m2,
offering
highest
conversion
at
temperature
950
°C.
corresponded
lowest
space
velocity,
reaction
temperature,
CH4
concentration,
maximum
90%
being
stable
until
end
2
h
time.
X-ray
diffraction
analysis
revealed
presence
Fe2O3
mixed
oxides,
Fe2(MoO4)3
FeMoO4
in
catalyst.
initial
H2
yield
∼61%,
it
decreased
during
reaction,
reaching
48%
after
4
reaction.
Various
structural,
textural,
morphological
characterizations
pre-
postreaction
performed
advanced
analytical
techniques.
Graphitic
alloy,
phases
observed
XRD
patterns
spent
Carbon
depositions
morphologies
under
different
conditions
ranging
nanoparticles
nanotubes
agglomerates
nanoflowers.
A
well-defined
network
nanoflowers
along
bamboo-shaped
could
be
over
optimized
conditions.
Catalysts,
Journal Year:
2025,
Volume and Issue:
15(1), P. 77 - 77
Published: Jan. 15, 2025
COx-free
H2,
along
with
uniform
carbon
nanotubes,
can
be
achieved
together
in
high
yield
by
CH4
decomposition.
It
only
needs
a
proper
catalyst
and
reaction
condition.
Herein,
Fe-based
dispersed
over
titania-incorporated-alumina
(Fe/Ti-Al),
the
promotional
addition
of
lanthanides,
like
CeO2
La2O3,
it,
is
investigated
for
methane
decomposition
at
800
°C
GHSV
6
L/(g·h)
fixed-bed
reactor.
The
catalysts
are
characterized
temperature-programmed
reduction
(TPR),
powder
X-ray
diffraction
(XRD),
Raman
spectroscopy,
transmission
electron
microscopy
(TEM).
promoted
facilitated
higher
surface
area
enhanced
dispersion
concentration
active
sites,
resulting
H2
yields
than
unpromoted
catalysts.
Ceria-promoted
20Fe/Ti-Al
had
highest
sites
always
attained
activity
initial
hours.
20Fe-2.5Ce/Ti-Al
attains
>90%
conversion,
>80%
H2-yield,
92%
up
to
480
min
time
on
stream.
nanotube
this
highly
uniform,
consistent,
has
degree
crystallinity.
supremacy
ceria-promoted
conversion
even
after
second
cycle
regeneration
studies
(against
87%
lanthanum-promoted
catalyst),
240
This
study
plots
path
achieving
catalytic
excellence
through
Catalysts,
Journal Year:
2025,
Volume and Issue:
15(2), P. 122 - 122
Published: Jan. 27, 2025
Research
on
converting
methane
to
hydrogen
has
gained
more
attention
due
the
availability
of
reserves
and
global
focus
sustainable
environmentally
friendly
energy
sources.
The
decomposition
through
catalysis
(CDM)
excellent
potential
produce
clean
valuable
carbon
products.
However,
developing
catalysts
that
are
both
active
stable
is
a
highly
challenging
area
research.
Using
titanium
isopropoxide
as
precursor
different
loadings
TiO2
(10
wt.%,
20
30
wt.%),
alumina
been
coated
with
in
single-step
hydrothermal
synthesis
procedure.
These
synthesized
materials
examined
possible
support
for
CDM;
wt.%
iron
loaded
onto
material
using
co-precipitation
method
enhance
conversion
via
reaction.
result
shows
Fe/20
Ti-Al
(20Fe/20Ti-Al)
catalyst
demonstrates
remarkable
stability
exhibits
superior
performance,
reaching
rate
94%
production
84%
after
4
h.
outstanding
performance
primarily
moderate
interaction
between
metal,
well
presence
rutile
phase.
20Fe/30Ti-Al
exhibited
lower
activity
than
other
catalysts,
achieving
85%
79%
during
Raman
XRD
analysis
revealed
all
generated
graphitic
carbon,
20Fe/20Ti-Al
specifically
producing
single-walled
nanotubes.
