Energy and exergy analysis of complex gas turbines systems powered by a mixture of hydrogen and methane
International Journal of Hydrogen Energy,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 1, 2025
Язык: Английский
Production and Storage of Hydrogen from Biomass and Other Sources: Technologies and Policies
Energies,
Год журнала:
2025,
Номер
18(3), С. 650 - 650
Опубликована: Янв. 30, 2025
Hydrogen
has
emerged
as
a
critical
energy
carrier
for
achieving
global
decarbonization
and
supporting
sustainable
future.
This
review
explores
key
advancements
in
hydrogen
production
technologies,
including
electrolysis,
biomass
gasification,
thermochemical
processes,
alongside
innovations
storage
methods
like
metal
hydrides
liquid
organic
carriers
(LOHCs).
Despite
its
promise,
challenges
such
high
costs,
scalability
issues,
safety
concerns
persist.
Biomass
gasification
stands
out
dual
benefits
of
waste
management
carbon
neutrality
yet
hurdles
feedstock
variability
efficiency
need
further
attention.
also
identifies
opportunities
improvement,
developing
cost-effective
catalysts
hybrid
systems,
while
emphasizing
future
research
on
improving
tackling
bottlenecks.
By
addressing
these
challenges,
can
play
central
role
the
transition
to
cleaner
systems.
Язык: Английский
Bifunctional barium cerate catalyst doped with Fe for enhanced electrochemical stability during oxygen reduction and evolution reactions
International Journal of Hydrogen Energy,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 1, 2025
Язык: Английский
Achieving high stability in nickel-based solid oxide fuel cell stacks with direct internal reforming of methane
International Journal of Hydrogen Energy,
Год журнала:
2025,
Номер
106, С. 1285 - 1295
Опубликована: Фев. 8, 2025
Язык: Английский
Challenges and innovations in green hydrogen storage technologies
International Journal of Hydrogen Energy,
Год журнала:
2025,
Номер
113, С. 322 - 339
Опубликована: Март 1, 2025
Effects of Annealing on Hydrogen Storage Performance in TiZrCrMnFeNi High-Entropy Alloy
Crystals,
Год журнала:
2025,
Номер
15(4), С. 297 - 297
Опубликована: Март 25, 2025
This
study
employed
annealing
heat
treatment
ranging
from
900
to
1300
°C
systematically
investigate
the
effects
of
temperature
on
microstructure
and
hydrogen
storage
performance
equimolar
TiZrCrMnFeNi
high-entropy
alloy.
The
research
indicates
that
alloy
is
composed
C14
Laves
phase
a
small
amount
cubic
phase.
Compared
as-cast
alloy,
annealed
at
high
(1000~1200
°C)
exhibited
increased
homogeneity,
higher
content
phase,
significant
enhancement
in
capacity.
led
changes
unit
cell
volume
with
an
inverse
relationship
between
absorption
desorption
plateau
pressures.
An
increase
resulted
lower
pressure,
making
reaction
more
difficult
consequently
increasing
enthalpy
change
for
desorption.
not
only
reveals
intrinsic
alloys,
but
also
provides
experimental
evidence
theoretical
guidance
design
development
materials
excellent
characteristics.
Язык: Английский
Optimization of Hydrogen Combustion in Diesel Engines: A CFD-Based Approach for Efficient Hydrogen Mixing and Emission Reduction
Fuels,
Год журнала:
2025,
Номер
6(2), С. 27 - 27
Опубликована: Апрель 8, 2025
Hydrogen
internal
combustion
engines
(ICEs)
have
gained
significant
attention
as
a
promising
solution
for
achieving
zero-carbon
emissions
in
the
transportation
sector.
This
study
investigates
conversion
of
2
L
Diesel
ICE
into
lean
hydrogen-powered
ICE,
focusing
on
key
challenges
such
hydrogen
mixing,
pre-ignition,
flame
development,
and
NOx
emissions.
The
novelty
this
research
lies
specific
modifications
made
to
optimize
engine
performance
reduce
while
utilizing
existing
infrastructure.
identifies
several
important
design
changes
successful
hydrogen,
including
following:
Intake
port
design:
transitioning
from
swirl
tumble
enhance
mixing;
Injection
spark
plug
configuration:
using
lateral
injection
system
combined
with
central
improve
combustion;
Piston
employing
lenticular
piston
shape
adaptable
depth
Mitigating
Coanda
effect:
preventing
issues
at
deflectors
or
caps;
Head
maintaining
flat
head
efficient
ensuring
adequate
cooling
avoid
pre-ignition.
These
findings
highlight
importance
converting
providing
solid
foundation
further
ICEs,
which
could
contribute
carbon
emission
reduction
more
sustainable
energy
transition.
Язык: Английский
Synergistic Regulation of Rare Earth and Noble Metal Promoters on Ni-based Bifunctional Materials for Enhanced CO2 Methanation Performance and Reaction Mechanism
Catalysis Letters,
Год журнала:
2025,
Номер
155(5)
Опубликована: Апрель 9, 2025
Язык: Английский
Life cycle environmental impact assessment and review of hydrogen fuels obtained from various sources for vehicles
International Journal of Hydrogen Energy,
Год журнала:
2025,
Номер
127, С. 265 - 274
Опубликована: Апрель 14, 2025
Язык: Английский
Rare Earth Ce/CeO2 Electrocatalysts: Role of High Electronic Spin State of Ce and Ce3+/Ce4+ Redox Couple on Oxygen Reduction Reaction
Nanomaterials,
Год журнала:
2025,
Номер
15(8), С. 600 - 600
Опубликована: Апрель 14, 2025
With
unique
4f
electronic
shells,
rare
earth
metal-based
catalysts
have
been
attracting
tremendous
attention
in
electrocatalysis,
including
oxygen
reduction
reaction
(ORR).
In
particular,
atomically
dispersed
Ce/CeO2-based
explored
extensively
due
to
several
features.
This
review
article
provides
a
comprehensive
understanding
of
(i)
the
significance
effect
Ce
high-spin
state
on
ORR
activity
enhancement
Pt
and
non-pt
electrocatalysts,
(ii)
spatially
confining
stabilizing
ceria
generation
transition
catalysts,
(iii)
experimental
theoretical
evidence
Ce3+
↔
Ce4+
redox
pain
radical
scavenging,
(iv)
electrons
d-band
center
electron
transfer
between
N-doped
carbon
metal
for
enhanced
activity,
(v)
Pt/CeO2/carbon
heterojunctions
stability
electrocatalyst
ORR.
Among
strategies
synthesizing
Ce/CeO2
metal–organic
framework
(MOF)-derived
are
being
perused
tendency
readily
coordinate
with
O-
N-containing
ligands,
which
upon
undergoing
pyrolysis,
results
formation
high
surface
area,
porous
networks
metallic/clusters/nanoparticles
active
sites.
paper
an
overview
recent
advancements
regarding
derived
from
MOF
precursor
fuel
cells
metal–air
battery
applications
we
conclude
insights
into
key
issues
future
development
directions.
Язык: Английский