Advances in Materials Science and Engineering,
Journal Year:
2024,
Volume and Issue:
2024(1)
Published: Jan. 1, 2024
The
chemical
absorption
biological
reduction
process
gained
profound
attention
in
NOx
removal.
Treatments
for
are
done
popularly
using
NH
3
selective
catalytic
(SCR),
and
deNOx
is
greatly
influenced
by
catalyst.
In
recent
years,
zeolites
have
been
widely
explored
ammonia‐selective
(NH
‐SCR)
under
low‐temperature
windows.
Different
methods
were
employed
to
juxtapose
the
performances
of
zeolite
catalysts
with
denitrification
‐SCR.
this
‐SCR
reaction,
catalyst’s
sulfur
water
poisoning
effects
also
investigated.
negatives
reactions
demonstrated
different
methods.
Ideally,
audit
will
set
upon
essential
comprehension
SCR
response
on
clear
way
future
exploration
accomplish
reasonable
applications.
current
review
provides
a
new
strategy
enhance
removal
reveals
fundamental
types
sustainable
environment.
Further,
perspective
economic
aspects
each
catalyst
examined.
Atmosphere,
Journal Year:
2024,
Volume and Issue:
15(8), P. 997 - 997
Published: Aug. 20, 2024
Heavy-duty
diesel
vehicles
are
a
significant
source
of
nitrogen
oxides
(NOx)
in
the
atmosphere.
The
Selective
Catalytic
Reduction
(SCR)
system
is
primary
aftertreatment
device
for
reducing
NOx
emissions
from
heavy-duty
vehicles.
With
increasingly
stringent
emission
regulations
major
countries,
there
growing
focus
on
under
low
exhaust
temperature
conditions,
as
well
monitoring
conversion
efficiency
SCR
over
its
entire
lifecycle.
By
reviewing
relevant
literature
mainly
past
five
years,
this
paper
reviews
development
trends
and
related
research
results
technology,
focusing
two
main
aspects:
low-temperature
reduction
technology
combination
systems
with
remote
On-Board
Diagnostics
(OBD).
Regarding
review
indicate
that
multiple
catalytic
shows
potential
achieving
high
across
wide
range;
advanced
arrangement
can
accelerate
increase
within
system;
solid
ammonium
gaseous
reductants
effectively
address
issue
urea
not
being
able
to
be
injected
conditions.
As
OBD,
OBD
accurately
assess
vehicles,
but
it
needs
algorithms
correct
data
match
testing
process
required
by
regulations.
Remote
crucial
detecting
tampering,
must
developed
balance
accuracy
computational
efficiency.
This
provides
updated
information
current
status
directions
technologies,
offering
valuable
insights
future
into
systems.
Molecules,
Journal Year:
2024,
Volume and Issue:
29(18), P. 4506 - 4506
Published: Sept. 23, 2024
Selective
catalytic
reduction
of
nitrogen
oxides
(NOx)
with
ammonia
(NH3-SCR)
has
been
implemented
in
response
to
the
regulation
NOx
emissions
from
stationary
and
mobile
sources
above
300
°C.
However,
development
NH3-SCR
catalysts
active
at
low
temperatures
below
200
°C
is
still
needed
improve
energy
efficiency
cope
various
fuels.
In
this
review
article,
recent
reports
on
low-temperature
are
systematically
summarized.
The
redox
property
as
well
surface
acidity
two
main
factors
that
affect
activity.
strong
beneficial
for
activity
but
responsible
N2O
formation.
multiple
electron
transfer
system
more
plausible
controlling
properties.
H2O
SOx,
which
often
found
flue
gas,
have
a
detrimental
effect
activity,
especially
temperatures.
competitive
adsorption
can
be
minimized
by
enhancing
hydrophobic
catalyst.
Various
strategies
resistance
SOx
poisoning
also
discussed.
Processes,
Journal Year:
2024,
Volume and Issue:
12(11), P. 2434 - 2434
Published: Nov. 4, 2024
For
centuries,
fossil
fuels
have
been
the
primary
energy
source,
but
their
unchecked
use
has
led
to
significant
environmental
and
economic
challenges
that
now
shape
global
landscape.
The
combustion
of
these
releases
greenhouse
gases,
which
are
critical
contributors
acceleration
climate
change,
resulting
in
severe
consequences
for
both
environment
human
health.
Therefore,
this
article
examines
potential
hydrogen
as
a
sustainable
alternative
source
capable
mitigating
impacts.
It
explores
properties
hydrogen,
with
particular
emphasis
on
its
application
industrial
burners
furnaces,
underscoring
clean
high
density
comparison
fuels,
also
production
through
thermochemical
electrochemical
methods,
covering
green,
gray,
blue,
turquoise
pathways.
discusses
storage
transportation
challenges,
highlighting
methods
like
compression,
liquefaction,
chemical
carriers
(e.g.,
ammonia),
transport
via
pipelines
vehicles.
Hydrogen
mechanisms
optimized
burner
furnace
designs
explored,
along
benefits
lower
emissions,
contrasted
concerns
infrastructure
costs.
Additionally,
applications,
safety
concerns,
large-scale
adoption
addressed,
presenting
promising
yet
complex
fuels.
Materials,
Journal Year:
2025,
Volume and Issue:
18(5), P. 1175 - 1175
Published: March 6, 2025
This
study
investigates
the
structural
and
catalytic
properties
of
pure
Sr-doped
LaCoO3
LaFeO3
thin
films
for
potential
use
as
resistive
gas
sensors.
Thin
were
deposited
via
pulsed
laser
deposition
(PLD)
characterized
using
X-ray
diffraction
(XRD),
photoelectron
spectroscopy
(XPS),
scanning
electron
microscopy
(SEM),
atomic
force
(AFM),
nanoindentation,
scratch
tests.
XRD
analysis
confirmed
formation
desired
perovskite
phases
without
secondary
phases.
XPS
revealed
presence
La3+,
Co3+/Co4+,
Fe3+/Fe4+,
Sr2+
oxidation
states.
SEM
AFM
imaging
showed
compact,
nanostructured
surfaces
with
varying
morphologies
(shape
size
surface
irregularities)
depending
on
composition.
Sr
doping
led
to
refinement
increased
nanohardness
adhesion.
Transmission
(TEM)
columnar
growth
nanocrystalline
films.
demonstrated
enhanced
sensitivity
stability
in
NO2
compared
LaCoO3,
evidenced
by
electrical
resistivity
measurements
within
230
÷
440
°C.
At
same
time,
it
was
found
that
stabilizes
activity
(in
range
300
350
°C),
although
its
behavior
differs
from
LaCo(Sr)O3-especially
terms
response
recovery
times.
These
findings
highlight
sensing
applications.
Sustainability,
Journal Year:
2025,
Volume and Issue:
17(6), P. 2469 - 2469
Published: March 11, 2025
In
pursuing
sustainable
environmental
solutions,
the
concept
of
‘waste
to
treasure’
has
emerged
as
a
promising
approach.
this
study,
new
process
is
proposed
combine
solid
copper
slag
with
hydrogen
peroxide
(H2O2)
remove
nitrogen
oxides
(NOx)
from
acidic
exhaust
gases,
thus
effectively
utilizing
waste
materials.
Firstly,
different
smelting
slags
were
screened
determine
catalytic
potential
for
peroxide.
Subsequently,
activity
at
various
stages
was
thoroughly
evaluated
and
optimized.
addition,
multifactorial
evaluation
slow-cooled
catalysts
removing
NOx
carried
out.
Preliminary
indications
are
that
iron
phase
in
identified
main
source
sites.
The
results
suggest
Fe2+/Fe3+
sites
on
surface
Fe
may
be
crucial
improving
removal
efficiency.
reactive
oxygen
species
detected
system
·OH,
·O2⁻,
1O2.
transformation
products,
formation
pathways,
reaction
mechanisms
NO
liquid
initially
investigated
determined.
This
study
provides
green
path
utilization
management
atmospheric
fumes
non-ferrous
metal
industry
offers
perspectives
address
challenges
industrial
processes.
