Energies,
Год журнала:
2024,
Номер
17(24), С. 6407 - 6407
Опубликована: Дек. 19, 2024
This
study
is
related
to
producing
a
set
of
fatty
acid
esters
from
different
vegetable
oils
and
C1–C12
alcohols.
A
total
66
products
were
synthesized.
The
obtained
characterized
by
composition,
density,
viscosity,
saponification
value,
iodine
low-temperature
properties,
oxidative
stability.
It
was
established
that
the
as
well
alcohol,
used
has
significant
impact
on
properties.
Comparing
physicochemical
properties
with
existing
standards
specifications,
it
proposed
use
for
industrial
applications.
In
particular,
rapeseed
oil
methyl
are
an
ideal
candidate
application
biodiesel,
while
transesterification
soybean
oil,
sunflower
coconut
higher
alcohols
led
promising
bio-lubricants.
Castor
alkyl
could
potentially
be
utilized
base
due
their
excellent
viscosity
Energies,
Год журнала:
2024,
Номер
17(14), С. 3449 - 3449
Опубликована: Июль 13, 2024
With
the
continuous
growth
of
global
energy
demand
and
increasingly
prominent
environmental
issues,
research
utilization
renewable
as
a
substitute
for
traditional
fossil
fuels
have
gained
significant
importance.
Biofuels,
recognized
key
source,
are
widely
considered
viable
alternative
to
fuels.
The
primary
component
biodiesel
is
fatty
acid
methyl
esters
(FAMEs),
which
prone
oxidative
degradation
due
their
unsaturated
nature
during
storage
transportation.
Various
studies
identified
several
factors
influencing
stability
biodiesel,
including
oxygen,
temperature,
light,
water
content,
microbial
growth,
corrosion
metal
tanks.
This
article
provides
comprehensive
summary
effects
different
on
explores
interrelationships
between
these
factors.
To
enhance
strategies
been
proposed,
such
optimizing
production
processes,
adding
antioxidants,
controlling
environments,
conducting
regular
inspections.
review
aims
provide
theoretical
basis
long-term
promote
its
widespread
application
in
practical
scenarios.
Results in Engineering,
Год журнала:
2024,
Номер
23, С. 102613 - 102613
Опубликована: Июль 26, 2024
Improvement
in
biofuel
synthesis
technology
could
facilitate
widespread
utilization
of
biodiesel,
and
an
efficient
operation
terms
cost.
Catalyst
enhancement
through
mineralization
waste
biogenic
material
is
vital
for
biodiesel
production.
In
this
study,
production
was
from
cooking
oil
(WCO)
using
a
bifunctional
catalyst
synthesized
eggshells
ferric
sulfate.
The
CaO
precursor
developed
calcined
eggshell
at
800
°C
3
h
impregnated
with
sulfate
ratio
1:1.
Bifunctional
characterized
X-ray
diffractometer,
scanning
electron
microscopy,
Fourier
transform
infrared
spectroscopy
energy-dispersive
analysis.
applied
one-pot
reaction
WCO
methanol
to
produce
biodiesel.
modeled
the
Taguchi
orthogonal
array
design
maximize
heterogeneous
contained
Ca
(20.7
%),
Fe
(18.5
S
(4.5
O
(54.8
%).
identified
crystalline
phases
are
CaSO4/Fe2O3
CaSO4.0.5H2O/Fe2O3.
A
maximum
yield
89.94
wt%
observed
under
operating
conditions
methanol/oil
molar
5:1,
time
45
min,
temperature
70
°C,
amount
4
wt%.
reusability
established
(four)
cycles
without
further
treatment.
met
standard
specifications.
Hence,
proved
effective
transesterification
moderately
high
free
fatty
acid,
thereby
expedite
oil,
serve
as
fuel
powering
diesel
engines.
Fermentation,
Год журнала:
2025,
Номер
11(2), С. 62 - 62
Опубликована: Фев. 1, 2025
Renewable
energy
sources,
such
as
biofuels,
represent
promising
alternatives
to
reduce
dependence
on
fossil
fuels
and
mitigate
climate
change.
Their
production
through
enzymatic
hydrolysis
has
gained
relevance
by
converting
agro-industrial
waste
into
fermentable
sugars
residual
oils,
which
are
essential
for
the
generation
of
bioethanol
biodiesel.
The
fungus
Aspergillus
stands
out
a
key
source
enzymes,
including
cellulases,
xylanases,
amylases,
lipases,
crucial
breakdown
biomass
oils
produce
fatty
acid
methyl
esters
(FAME).
This
review
examines
current
state
these
technologies,
highlighting
significance
in
conversion
energy-rich
materials.
While
process
holds
significant
potential,
it
faces
challenges
high
costs
associated
with
final
processing
stages.
Agro-industrial
is
proposed
an
resource
support
circular
economy,
thereby
eliminating
reliance
non-renewable
resources
processes.
Furthermore,
advanced
pretreatment
technologies—including
biological,
physical,
physicochemical
methods,
well
use
ionic
liquids—are
explored
enhance
efficiency.
Innovative
genetic
engineering
strains
enzyme
encapsulation,
promise
optimize
sustainable
biofuel
addressing
advancing
this
technology
towards
large-scale
implementation.
Molecules,
Год журнала:
2025,
Номер
30(5), С. 1075 - 1075
Опубликована: Фев. 26, 2025
The
objective
of
this
study
was
to
evaluate
the
catalytic
performance
commercial
Nb2O5,
supplied
by
CBMM,
in
production
biodiesel
transesterification
and
esterification,
using
different
feedstocks
(soybean,
corn,
sunflower,
waste
oils)
both
methyl
ethyl
routes.
For
this,
catalyst
characterized
terms
its
crystal
structure
X-ray
diffraction
(XRD),
specific
surface
area
Brunauer-Emmett-Teller
(BET)
technique,
thermal
stability
thermogravimetric
analysis
(TGA),
morphology
scanning
electron
microscopy
(SEM),
acidity
ammonia
desorption
at
programmed
temperature
(TPD-NH3),
activity
gas
chromatography.
results
from
structural
analyses
indicated
that
Nb2O5
has
a
single
monoclinic
phase
consisting
irregular
agglomerates.
1.3
m2/g,
density
4.639
g/cm3.
showed
material
stability,
maintaining
integrity
up
temperatures
as
high
1000
°C.
total
reached
301
μmol
NH3/g,
indicating
presence
Brønsted
Lewis
acidic
sites.
In
tests,
higher
efficiency
route,
achieving
an
initial
conversion
96.43%
esters
with
soybean
oil,
outperforming
other
feedstocks.
However,
reuse
over
five
cycles
revealed
progressive
decrease
activity,
possibly
due
blocking
active
sites
adsorbed
products,
confirmed
FTIR
XRD
conducted
on
catalyst.
Despite
decreased
after
cycles,
maintained
structure,
stability.
These
demonstrate
potential
heterogeneous
for
production,
particularly
route
high-quality
oils.
This
highlights
relevance
synthesis,
contributing
sustainable
practices
technological
advancement
renewable
energy
sector.
Separation Science and Technology,
Год журнала:
2024,
Номер
unknown, С. 1 - 20
Опубликована: Авг. 13, 2024
The
wide
expansion
of
the
meat
industry
generated
tremendous
amounts
animal-based
waste.
Discarded
beef
tallow
(DBT)
is
one
those
prevalent
lipid-rich
wastes
disposed
by
slaughterhouses,
processing
units,
and
tanneries.
current
study
utilized
advanced
technology
supercritical
CO2
(SC-CO2)
to
extract
lipid
content
from
DBT
for
biodiesel
production
through
transesterification.
effects
SC-CO2
parameters
on
extraction
rate
were
investigated
over
ranges
(32–80°C)
temperature,
(10–50
MPa)
pressure,
(15–150
min)
treatment
time.
Using
response
surface
methodology
(RSM),
both
processes
transesterification
optimized.
highest
was
86.10%,
obtained
at
experimental
conditions
60°C
30
MPa
120
min
For
transesterification,
maximum
yield
95.15%,
reaction
1:7.5,
1.16
wt%,
58°C,
72
methanol
molar
ratio,
catalyst
time,
respectively.
outcomes
kinetic
thermodynamic
analyses
showed
that
an
endothermal,
unspontaneous,
temperature-dependent
process.
characteristics
synthesized
largely
comply
with
ASTM
D6751
EN
14,214
standards.
findings
confirm
viability
lipids
as
a
low-cost
feedstock
production.
Abstract
The
depletion
of
fossil
fuels
and
growing
environmental
concerns
necessitate
the
exploration
renewable
energy
sources.
Biodiesel,
a
promising
alternative
fuel
derived
from
sustainable
feedstock,
has
attracted
considerable
attention.
This
study
investigates
catalytic
esterification
oleic
acid,
readily
available
fatty
with
ethanol
for
biodiesel
production
using
novel
heterogeneous
catalyst,
ZrO
2
/Al
O
3
.
Crystalline
/Al2O
was
successfully
synthesized
characterized
X-ray
diffraction
(XRD),
Brunauer–Emmett–Teller
(BET)
surface
area
analysis,
Fourier-transform
infrared
spectroscopy
(FTIR),
photoelectron
(XPS)
temperature
programmed
desorption
NH
-TPD
to
understand
its
structural
textural
properties.
then
employed
catalyze
reaction.
influence
reaction
parameters,
including
temperature,
alcohol-to-oleic
acid
molar
ratio,
catalyst
loading,
systematically
evaluated.
Under
optimal
conditions
(70
°C,
10:1
4
wt%
loading),
remarkable
90.5%
conversion
achieved.
Furthermore,
exhibited
reusability,
demonstrating
potential
low-grade
feedstock.
