Development of a novel method to synthesize Ni/SiO2.MgO catalysts using EDTA as a chelating agent for the methane decomposition process
Powder Technology,
Год журнала:
2024,
Номер
443, С. 119896 - 119896
Опубликована: Май 21, 2024
Язык: Английский
The effect of catalyst particle size and temperature on CNT growth on supported Fe catalysts during methane pyrolysis
Catalysis Today,
Год журнала:
2025,
Номер
unknown, С. 115275 - 115275
Опубликована: Март 1, 2025
Язык: Английский
Co-Ni on zirconia and titania catalysts for methane decomposition to hydrogen and carbon nanomaterials: The role of metal-support interactions
Fuel,
Год журнала:
2024,
Номер
369, С. 131675 - 131675
Опубликована: Апрель 15, 2024
Язык: Английский
Role of MgO in Al2O3‐supported Fe catalysts for hydrogen and carbon nanotubes formation during catalytic methane decomposition
Energy Science & Engineering,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 1, 2024
Abstract
Catalytic
methane
decomposition
is
a
promising
technology
for
reducing
the
reliance
on
fossil
fuels
and
mitigating
effects
of
climate
change
by
producing
clean
hydrogen
value‐added
carbon
without
emission
greenhouse
gases.
The
aim
study
was
to
investigate
use
Al
2
O
3
‐modified
MgO
doped
iron‐based
catalysts
catalytic
methane.
were
synthesized
using
impregnation
method
characterized
various
analysis
techniques,
including
Brunauer,
Emmett,
Teller,
temperature
programmed
reduction,
oxidation,
X‐ray
diffraction,
thermal
gravimetric
analysis,
Raman,
scanning
electron
microscopy,
transmission
microscopy.
activity
tested
in
packed‐bed
reactor
with
gas
flow
rate
20
mL/min
at
800°C.
investigation
focuses
influence
incorporating
magnesium
into
alumina
concentration
ranging
from
(20%–70%),
where
higher
levels
improve
creating
more
active
sites,
positively
impacting
decomposition.
Enhanced
catalyst
reducibility
increased
particle
dispersion
lead
improved
properties
despite
reduced
surface
area.
FA70M
FA63M
exhibited
almost
same
characteristics
highest
stability
conversion
among
investigated,
reaching
87%
85%
800°C
120
min.
Moreover,
both
showed
yields
86%
85%,
respectively.
introduction
further
total
yield
103%
FA
39%
FM
114%
120%
respective
(FA70M
FA63M).
During
reaction,
nanotubes
varying
diameters
produced.
Higher
iron
loading
resulted
positive
trend.
Язык: Английский
Catalytic Hydrothermal Liquefaction of Grape Pomace Using Ni–ZrO2–MSS and Ni–HZSM5 in a Water–Crude Glycerol Cosolvent
ACS Omega,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 23, 2025
This
study
focused
on
the
catalytic
hydrothermal
liquefaction
(HTL)
of
grape
pomace
using
Ni–HZSM5
and
Ni–ZrO2–modified
steel
slag
(MSS)
catalysts,
employing
a
water-crude
glycerol
cosolvent.
The
research
aimed
to
understand
how
temperature,
solvent
ratios,
crude
composition
affect
biocrude
yield
properties,
evaluate
stability
regenerated
catalysts.
results
revealed
that
when
fatty
acids/glycerides-rich
was
used,
highest
76
wt
%,
HHV
41
MJ/kg,
H/C
ratio
1.81,
energy
recovery
90.9%
achieved
at
320
°C
with
75%
concentration
in
Catalytic
HTL
significantly
reduced
acid
content
by
44%.
Although
Ni–ZrO2–MSS
increased
from
44.07
49.97
it
promoted
production
acids
esters
biocrude.
TGA
refinery
cut
showed
both
catalysts
enhance
diesel
production,
yielding
fraction
(41.24%)
compared
(37.51%)
noncatalytic
process
(33.56%).
Moreover,
heavier
fractions,
such
as
residual
fuel
oil
bitumen.
While
modification
enhanced
BET
surface
area
raw
4.04
49.61
m2/g
Ni–ZrO2–MSS,
catalyst
after
dropped
15.88
m2/g,
aligning
decreased
H2
uptake,
indicating
loss
active
sites.
Similarly,
522.25
387.37
HTL,
while
pore
volume
0.2095
0.3425
cm3/g.
However,
spent
displayed
an
increase
uptake
(269.49
μmol/g)
shift
reduction
peaks
higher
temperatures,
suggesting
creation
new
sites
or
changes
dispersion
NiO
species
during
reaction.
TPO
graphs
confirm
presence
coke
intermediate
structure
between
amorphous
graphitic
carbon.
Язык: Английский
Fe–Ce–Al Catalysts for Decomposition of Methane to High Purity Hydrogen and High-Value Carbon
Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(44), С. 18869 - 18878
Опубликована: Окт. 28, 2024
Catalytic
methane
decomposition
is
a
promising
technique
for
COx-free
hydrogen
production
and
carbon
nanomaterials.
In
this
research,
iron-supported
catalysts,
prepared
by
successive
wetness
impregnation,
were
studied
at
700
°C.
The
results
showed
that
Fe0
turned
out
to
be
the
active
site
greater
metal–support
interaction
led
formation
of
iron
aluminate
(FeAl2O4),
both
which
played
role
in
catalytic
activity
performance.
30Fe/Ce–Al
catalyst
performed
best
terms
maximum
conversion
(76%)
rate
(1.04
mol/gMetal/s/surface
area).
observation
also
suggested
10Fe/Ce–Al
significantly
deactivated
due
metal
particle
agglomeration,
as
evidenced
negligible
weight
loss
thermogravimetric
analysis.
contrast,
20Fe/Ce–Al
catalysts
from
agglomeration
deposition.
surface
morphology
analysis
spent
indicated
deposited
was
multiwalled
nanotubes
followed
base-growth
mechanism.
Язык: Английский