Materials,
Год журнала:
2024,
Номер
17(24), С. 6069 - 6069
Опубликована: Дек. 12, 2024
Rice
husk,
a
byproduct
of
rice
production,
poses
significant
environmental
challenges
due
to
disposal
issues,
while
the
emission
volatile
organic
compounds
into
atmosphere
further
exacerbates
these
concerns.
This
study
addresses
both
problems
by
exploring
potential
texturally
enhanced
SiO2,
derived
from
Uruguayan
as
catalytic
support
for
manganese
oxides
in
combustion
compounds.
SiO2
was
synthesized
husk
ash
using
sustainable,
acid-free
pretreatment
method,
yielding
notably
high
silica
purity
96.5%—a
level
comparable
or
exceeding
previously
reported
values,
highlighting
quality
inherent
husk.
The
activity
evaluated
acetone
model
compound,
achieving
up
90%
conversion
with
30
wt.%
oxide
at
300
°C,
CO2
primary
product.
Furthermore,
24
h
stability
test
demonstrated
consistent
performance,
maintaining
rate
around
95.6
±
2.5%.
These
findings
suggest
that
high-purity
its
sustainability
benefits,
offers
an
effective
solution
removal
when
supporting
active
phase
such
oxides,
addressing
and
compound
emissions.
Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(32), С. 14095 - 14103
Опубликована: Авг. 3, 2024
Even
if
a
newly
developed
catalyst
is
super
excellent,
commercialization
will
not
be
achieved
without
molding
technology.
Unfortunately,
the
thermal-instability
infeasible
to
extruded
since
an
afterward
calcination
necessary
increase
mechanical
strength.
Thus,
coating
technology
necessity.
In
this
work,
easy
method
was
put
forward.
brief,
powder
pretreated
by
ball
milling
and
coated
on
cordierite
before
being
stabilized
at
105
°C.
When
thickness
increased
from
23.89
30.59
μm,
internal
diffusion
resistance
(Rin)
for
catalytic
oxidization
of
chlorobenzene
0.93
1.37
s·m–1
200
Although
higher
temperature
(350
°C)
decreased
Rin
0.62
s·m–1,
energy
consumption
relatively
huge.
comparison
increasing
temperature,
effective
preferable.
As
VW/Ti
used
in
preferred
content
slurry
40–45
wt
%
together
with
rate
13–14
%.
The
catalyst-powder
size
weight
percentage
determined
both
adhesive
force
pore
amount
formed
layer.
main
result
work
favor
commercializing
temperature-sensitive
catalyst.
Catalysts,
Год журнала:
2025,
Номер
15(3), С. 252 - 252
Опубликована: Март 6, 2025
With
the
increasing
demand
for
air
pollution
control,
development
of
efficient
and
stable
catalysts
to
degrade
hazardous
VOCs
such
as
toluene
has
become
particularly
important.
Herein,
various
copper-doped
attapulgite-supported
cobalt
oxide
spinel
composites
(CuxCo3−xO4/ATP)
were
synthesized
using
an
ultrasonic-assisted
precipitation
method.
The
results
showed
that
abundant
Si-OH
groups
on
surface
ATP
played
a
crucial
role
in
anchoring
Co,
instantaneous
high-energy
input
ultrasonication
facilitated
formation
Si-O-Co
bonds
Co3O4/ATP.
doping
Cu
ions
induced
expansion
Co3O4
lattice,
resulting
significant
number
oxygen
vacancies.
ultrasound-induced
Cu0.1Co2.9O4/ATP
catalyst
exhibited
best
catalytic
oxidation
performance,
achieving
99%
degradation
rate
at
300
°C
under
weight
hourly
space
velocity
(WHSV)
10,000
mL·g−1
h−1
initial
concentration
1000
ppm,
along
with
high
stability
during
12
h
continuous
running.
This
work
presents
new
strategy
cost-effective
elimination
VOCs.
Crystals,
Год журнала:
2023,
Номер
13(12), С. 1674 - 1674
Опубликована: Дек. 11, 2023
Cordierite-based
supported
noble-metal-free
catalysts
for
ozone
decomposition
are
elaborated.
The
cordierite
ceramic
surface
is
pretreated
with
oxalic
acid
and
NaOH,
Mn-Cu-Ni
oxide
prepared
by
the
impregnation
method.
mass
ratio
of
oxides
in
resulting
MnO2:CuO:NiO
=
3:2:1,
their
loadings
from
1.8
to
7.0
wt.%.
supports
characterized
low-temperature
N2
adsorption,
scanning
electron
microscopy
(SEM),
powder
X-ray
diffraction
analysis
(XRD),
temperature-programmed
reduction
H2
(TPR-H2).
tested
high
airflow
rates
(20
50
L/min)
initial
concentrations
1
2
ppm
at
temperatures
range
25–120
°C.
It
shown
that
a
combined
treatment
NaOH
leads
developed
porous
structure
stabilization
highly
dispersed
state.
activity
room
temperature
demonstrated.
can
be
recommended
application
purification
air
because
catalytic
activity,
mechanical
stability,
relatively
low
weight
cost.
