Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
496, P. 153948 - 153948
Published: July 14, 2024
This
work
reports
on
the
catalytic
performance
of
5
wt%
Ni/SBA-15
catalysts
promoted
with
different
contents
CeLa10Cu
metal-oxide
(X
=
0%,
10%,
20%,
30%,
40%)
towards
dry
reforming
methane
(DRM).
The
high
surface
area
SBA-15
allows
confinement
Ni
in
its
channels
and
improved
dispersion.
specific
was
found
to
be
182–307
m2/g
range.
Structural
analysis
(X-ray
diffraction
Raman)
showed
that
ceria-related
cubic
fluorite
phase
is
only
observed
at
onset
20%
content
higher.
Additionally,
Raman
studies
alongside
29Si
solid
state
NMR
demonstrated
promoter-support
interactions
through
formation
Ce–O–Si
bond
(Raman
bands
806
cm−1
1065
cm−1).
addition
promoter
reducibility
basicity
catalyst,
which
reflected
time-on-stream
(stability)
tests
performed
reference
catalyst
(5%
Ni/SBA-15)
as
well
5%
Ni/
30%
CeLa10Cu-SBA-15
(i.e.
best
performing
this
study).
latter
superior
coke
resistance
long
test
runs
(100
h).
HR-TEM
XPS
confirmed
NiCu
bimetallic
alloy
where
Cu
originating
from
active
metal
support,
respectively;
affected
electronic
structure
stabilized
during
DRM
reaction
severe
conditions.
promotion
decreased
carbon
(TGA
analysis).
TGA
spectra
spent
exhibited
least
amorphous
nature
100
h
DRM.
low
angle
XRD
some
deterioration
after
DRM,
whereas
maintained
12
