Journal of the Turkish Chemical Society Section B Chemical Engineering,
Journal Year:
2024,
Volume and Issue:
8(1), P. 83 - 96
Published: Nov. 26, 2024
This
research,
which
explores
the
potential
of
activated
carbon-supported
co-impregnated
metal
catalysts,
has
to
significantly
contribute
field
energy
systems
engineering
and
future
biodiesel
production.
In
this
study,
spruce
sawdust
was
used
produce
carbon.
A
single-step
method
applied
for
carbonization
activation.
Spruce:KOH
adjusted
as
1:2
carbonized
at
800
°C
1
hour
under
nitrogen
gas
flow.
The
pairs
were
prepared
with
a
1:1
mass
ratio
each
metal.
Then,
10%
(w/w)
such
Cu-Fe,
Fe-Zn,
Cu-Zn
are
impregnated
on
catalysts
calcinated
550
3
hours
atmosphere.
Various
characterization
techniques,
BET,
SEM-EDS,
XRD
analysis,
analyze
activity
these
heterogeneous
catalysts.
catalyst
loading
5%
oil
weight,
molar
alcohol
19:1,
reaction
temperature
65
°C,
time
in
esterification
sunflower.
According
results,
all
obtain
similar
FT-IR
results.
yields
Fe-Zn/AC,
Cu-Zn/AC,
Cu-Fe/AC
calculated
74.67%,
89.02%,
68.16%,
respectively.
Bitlis Eren Üniversitesi Fen Bilimleri Dergisi,
Journal Year:
2025,
Volume and Issue:
14(1), P. 633 - 646
Published: March 26, 2025
The
aim
of
this
study
was
to
develop
nickel
(Ni)
nanoclusters
with
caffeine-coated
magnetic
iron
oxide
(Fe3O4)
center
shells
for
the
catalytic
hydrolysis
ammonia
borane
(AB).
In
study,
(MIO)
clusters
were
obtained
by
hydrothermal
treatment.
These
first
coated
caffeine
according
reflux
method
at
150
oC
12
hours,
and
then
Ni
decorated
on
these
impregnation
method.
Magnetic
catalyst
(Ni@C/Fe3O4)
synthesized
dropping
10
M
20
mL
sodium
borohydride
(NaBH4-SBH)
into
Ni-C/
Fe3O4
in
solution
as
a
result
loading
processes
carried
out
room
conditions.
After
filtration,
washing
drying
nitrogen
atmosphere,
crumbled
identified
advanced
identification
techniques
(FT-IR,
BET,
SEM,
EDX,
XPS)
used
AB
hydrolysis.
solvate
medium,
amount,
concentration,
temperature
repeated
use
parameters
investigated
As
optimization
303
K,
best
hydrogen
production
determined
7873
mL/g.min
using
2.5
%
NaOH,
30
mg
300
mM
AB.
cycle
frequency
(TOF)
measured
1447
s-1.
reaction
kinetics
investigations,
it
that
1st
order
activation
energy
35.07
kJ/mol.
Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi,
Journal Year:
2024,
Volume and Issue:
26(2), P. 455 - 471
Published: July 1, 2024
In
this
work,
a
cobalt
catalyst
supported
by
activated
carbon
was
used
to
produce
hydrogen
through
the
hydrolysis
of
sodium
borohydride
(NaBH4).
First,
hydrochar
produced
from
MDF
powder
hydrothermal
pretreatment.
Then,
ideal
parameters
(activator
percentage,
activation
time,
baking
and
temperature)
for
production
were
determined.
The
best
conditions
synthesis
found
be
70%
activator
rate,
24
hours
45
minutes
700
⁰C
temperature,
according
iodine
number
measurements.
measured
as
929
mg/g
under
optimum
conditions.
Activated
(as
support)
combined
with
catalyst.
DT/TGA,
FT-IR,
SEM,
EDX
analyses
evaluate
catalyst's
structure.
Supporting
material
ratio,
NaOH
concentration,
amount,
NaBH4
concentration
are
variables
studied
in
synthesis.
trials
led
identification
optimal
being
support
material,
5%
NaOH,
40
mg
catalyst,
2%
concentration.
rate
synthesized
these
determined
8592.8
ml/g.min.
As
result
reactions
carried
out
at
different
temperatures,
it
that
reaction
n.
order
energy
31.19
kJ/mol.
Even
after
sixth
use,
100%
efficiency
attained
when
activity
tested
repeatedly.
