Enhanced oxidative coupling of methane over Mn2O3–Na2WO4/TS-1 catalysts by the Ti induced synergistic effect between Mn2O3 and Na2WO4
Catalysis Science & Technology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Compared
with
the
Na–W–Mn/S-1
catalyst,
introduction
of
Ti
species
in
Na–W–Mn/8%TS-1
catalyst
can
promote
interaction
between
Na
2
WO
4
and
Mn
O
3
,
thereby
enhancing
catalytic
activity
OCM
reaction.
Language: Английский
Enhanced oxidative coupling of methane using strontium and barium doped lanthanum or samarium oxide nanocatalysts
Chemical Engineering Communications,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 17
Published: March 24, 2025
Language: Английский
Interface Engineering of Hierarchically Confined Pt-MnO 2 /m-Al 2 O 3 Catalysts and Their Performance and Mechanism in Low-Temperature Methane Catalytic Combustion
Zeng Xiaoyi,
No information about this author
Ruikun Zhang,
No information about this author
Xiang Xian-bing
No information about this author
et al.
Research Square (Research Square),
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 25, 2025
Abstract
In
this
study,
hierarchically
confined
Pt-MnO
2/m-
Al
2O
3
catalysts
were
synthesized
via
a
precipitation
method
using
MnO
2-
as
promoters,
and
their
methane
catalytic
combustion
performance
structure-activity
relationships
systematically
investigated.
The
results
demonstrate
that
the
0.5
wt%
Pt-loaded
catalyst
achieved
90%
conversion
at
228
℃
(T
90).
enhanced
is
attributed
to
three
synergistic
mechanisms:
(1)
Pt
doping
induced
lattice
contraction
in
MnO
2
(XRD
revealed
0.03
Å
reduction
(001)
interplanar
spacing),
which
facilitated
formation
of
3+-oxygen
vacancy
pairs
(XPS
indicated
Mn
3+-
content
79.87%);
(2)
PtO-MnPt
3O
6
interfacial
structure
(HAADF-STEM
confirmed
spacings
0.23/0.21
nm)
accelerated
oxygen
species
cycling,
with
desorption
capacity
(O
2-TPD)
increasing
by
38%
compared
undoped
samples;
(3)
mesoporous
m-Al
2O
3
carrier
provided
effective
confinement,
achieving
high
specific
surface
area
(28.1
m
2/g)
sub-nanometer
dispersion
(particle
size
<
2
nm).
Under
conditions
1000
ppm
CH
4
space
velocity
30,000
h
–1,
maintained
rate
98.2
±
0.5%
during
continuous
operation
for
30
hours.
Post-cycling
characterization
stable
crystalline
full
width
half
maximum
0.35°±0.02°)
grain
(12.3
nm),
confirming
its
robustness
industrial
applications.
This
study
provides
theoretical
experimental
foundations
rational
design
highly
efficient
low-concentration
elimination.
Language: Английский
In situ/operando spectroscopic studies of Cu-doped CeO2 on SiO2 derived from coal gangue for preferential CO oxidation
Min Zou,
No information about this author
Yang Liu,
No information about this author
Zewei Fu
No information about this author
et al.
Journal of environmental chemical engineering,
Journal Year:
2025,
Volume and Issue:
unknown, P. 116822 - 116822
Published: April 1, 2025
Language: Английский
CO2-Assisted Oxygen Exchange to Enhance the Chemical Looping Oxidation Coupling of Methane
ACS Sustainable Chemistry & Engineering,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 8, 2025
Language: Английский
Chemical looping for upgrading light alkanes: oxygen carriers, reaction kinetics, and reactor design
Science China Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 8, 2024
Language: Английский
The influence of the catalyst preparation methods on performance of Mn/Na2WO4/SiO2 in oxidative coupling of methane
Applied Catalysis A General,
Journal Year:
2024,
Volume and Issue:
689, P. 120007 - 120007
Published: Nov. 5, 2024
Language: Английский
Decatungstate-doped Ce-MOF for methane photooxidation
Chinese Chemical Letters,
Journal Year:
2024,
Volume and Issue:
unknown, P. 110387 - 110387
Published: Sept. 1, 2024
Language: Английский