Catalysts,
Journal Year:
2024,
Volume and Issue:
14(12), P. 852 - 852
Published: Nov. 24, 2024
Methane
and
carbon
dioxide,
the
primary
contributors
to
global
warming,
are
now
at
critical
levels,
threatening
extinction
of
numerous
organisms
on
our
planet.
In
this
regard,
dry
reforming
methane
reactions
have
gained
considerable
attention
because
conversion
capacity
CH4
CO2
into
synthetic/energy-important
syngas
(H2
CO).
Herein,
a
molecular
sieve
(CBV3024E;
SiO2/Al2O3
=
30)
with
ZSM-8-type
pore
architect,
is
utilized
as
support
for
active
site
Ni
Ce
promoters.
Catalysts
characterized
by
surface
area
porosity,
X-ray
diffraction
study,
Raman
infrared
spectroscopy,
thermogravimetry
analysis,
temperature-programmed
reduction/desorption
techniques.
A
total
2
wt.%
ceria
added
over
5Ni/CBV3024E
induce
optimum
connectivity
aluminum
in
silicate
framework.
NiO
residing
these
porous
cages
mostly
under
“prominent
interaction
support”
which
reduced
easily
metallic
sites
DRM
reactions.
The
5Ni2Ce/CBV3024E
remain
stable
during
reaction
achieve
~58%
H2
yield
after
300
min
TOS
42,000
mL/(gcat.h)
GHSV
~70%
20
h
26,000
GHSV.
high
activity
longer
time
stream
justifies
using
CBV3024E
sieves
promoter
Ni-based
catalyst
towards
reaction.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 13, 2024
Abstract
Dry
reforming
of
methane
(DRM),
a
pivotal
process
for
converting
greenhouse
gases
into
syngas
is
demanding
rationally
designed
catalysts
with
high
stability
and
ideal
catalytic
performance
industrial
applications
due
to
its
reactant
molecules
characteristic
carbon
deposition.
However,
the
mechanistic
understanding
how
coordination
environment
metal
in
single‐atom
system
may
influence
remains
limited.
In
this
work,
high‐
low‐coordinating
Ru‐based
(RuHC
RuLC)
distinct
Ru‐O
numbers
are
prepared
using
one‐pot
two‐step
methods.
The
difference
(12.3%
negligible
deactivation
during
20
h
test
RuLC
RuHC
respectively)
selectivity
(0.57
0.37
H
2
/CO
ratio)
brought
by
signified
structure‐function
relationship
DRM.
impact
structure
on
properties
systematically
investigated
thorough
structural
operando
characterization
as
well
density
functional
theory
(DFT)
calculation.
findings
contribute
optimal
design
DRM,
offering
theoretical
basis
catalyst
development
potential
improve
process's
environmental
impact.
Processes,
Journal Year:
2024,
Volume and Issue:
12(5), P. 851 - 851
Published: April 23, 2024
The
valorization
of
greenhouse
gases,
especially
when
focused
on
carbon
dioxide,
currently
belongs
to
the
main
challenges
pro-environmental
chemical
processes.
One
important
technologies
in
this
field
is
dry
methane
reforming
(DMR),
leading
so-called
synthesis
gas
(CO
+
H2).
However,
be
efficient
and
economically
viable,
an
active
stable
catalyst
required.
Ni-based
systems
can
recommended
regard.
This
research
aimed
investigate
how
nickel
content
influence
activity
model
NiOx/CeO2
catalysts
DMR.
A
series
samples
various
loadings
(0–10
wt.%)
were
prepared
through
impregnation.
obtained
characterized
XRD,
RS,
N2-BET,
DRIFT,
SEM,
UV/Vis-DR,
XPS.
Nonlinear
changes
surface
properties
investigated
with
increasing
concentration
found.
observed
are
mirrored
both
determined
speciation
corresponding
catalytic
activity.
highest
was
found
for
containing
3
wt.%.
nickel.
