Physical and mechanical properties of wood treated with chitosan-caffeine formulations
European Journal of Wood and Wood Products,
Год журнала:
2025,
Номер
83(2)
Опубликована: Фев. 19, 2025
Язык: Английский
Valorization of Biodiesel Into Bio‐Based Plasticizers: Optimization of Epoxidized Fatty Acid Isobutyl Ester Production Using Response Surface Methodology and Artificial Neural Network
European Journal of Lipid Science and Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 9, 2025
ABSTRACT
Biodiesel
is
a
promising
green
chemical
feedstock
due
to
its
renewability
and
sustainability.
In
this
study,
bio‐based
plasticizers,
epoxidized
fatty
acid
isobutyl
esters
(Ep‐FABEs),
were
prepared
using
biodiesel
as
through
combination
of
transesterification
the
formic
autocatalytic
method.
The
effects
reaction
temperature,
time,
FA/C═C
molar
ratio,
H
2
O
/C═C
ratio
on
conversion
oxirane
(RCO)
during
epoxidation
process
investigated
central
composite
design.
Both
response
surface
methodology
(RSM)
artificial
neural
network
(ANN)
models
developed
model
optimize
process.
Comparative
analysis
revealed
that
ANN
demonstrated
superior
predictive
capabilities,
with
lower
mean
squared
error
(MSE),
absolute
(MAE),
higher
coefficient
determination
(
R
)
compared
RSM
model.
predicted
an
RCO
92%,
which
was
closely
aligned
experimental
value
91%
under
optimized
conditions
(reaction
temperature
66°C,
time
6.7
h,
0.35,
2.70).
Additionally,
physico‐chemical
properties
Ep‐FABEs
further
analyzed.
These
findings
provide
valuable
insights
into
production
plasticizers
feedstock.
Язык: Английский
Transformation of waste cooking oil into biodiesel in a microwave reactor using nickel-loaded graphitic biochar catalyst
Fuel,
Год журнала:
2025,
Номер
397, С. 135369 - 135369
Опубликована: Апрель 18, 2025
Язык: Английский
Useful Extracts from Coffee By-Products: A Brief Review
Separations,
Год журнала:
2024,
Номер
11(12), С. 334 - 334
Опубликована: Ноя. 21, 2024
The
waste
materials
generated
from
the
processing
of
coffee
cherries
are
still
rich
in
several
bioactive
compounds.
Several
studies
highlight
by-products
as
a
valuable
source
for
diverse
applications,
such
biofuels,
biopolymers,
biocomposites,
and
natural
antioxidants
food,
pharmaceuticals,
cosmetics.
development
prospective
strategies
valorization
wastes
is
goal
sustainable
circular
bioeconomy,
increasing
added
value
these
reducing
environmental
pollution.
This
brief
overview
describes
recently
proposed
procedures
extraction
recovery
functional
ingredients
diversity
by-products.
comparison
between
conventional
alternative
methods
enables
one
to
choose
most
suitable
techniques
valorizing
given
by-product.
Язык: Английский
Synergetic strategy: upgrading fuel properties of waste starch composite fuels by blending torrefied spent coffee grounds
Journal of the Taiwan Institute of Chemical Engineers,
Год журнала:
2024,
Номер
unknown, С. 105820 - 105820
Опубликована: Дек. 1, 2024
Язык: Английский
High-Energy-Density Hydrochar and Bio-Oil from Hydrothermal Processing of Spent Coffee Grounds—Experimental Investigation
Energies,
Год журнала:
2024,
Номер
17(24), С. 6446 - 6446
Опубликована: Дек. 21, 2024
Spent
coffee
grounds
(SCGs),
a
by-product
of
brewing,
have
high
application
potential.
However,
their
moisture
content
complicates
conventional
conversion
without
energy-intensive
drying.
This
study
explores
new
route
to
convert
SCGs
high-carbon
bioproducts,
such
as
hydrochar
and
bio-oil,
through
hydrothermal
processing.
The
effect
the
processing
variables,
i.e.,
temperature,
residence
time,
binary
solvent
reaction
medium,
on
distribution
resultant
bioproducts
was
investigated.
quality
fabricated
analyzed
by
means
instrumental
techniques
EA,
ATR-FTIR,
GC-MS,
GC-TCD-FID.
Two
dominant
fractions
were
liquid
bio-oil
solid
hydrochar.
highest
char
yield
(39
wt.%)
observed
under
milder
conditions
(low
T
short
times),
while
more
severe
led
an
increase
in
formation,
which
reached
maximum
46
wt.%.
resulting
bio-oils
similar
quality,
presenting
carbon
(71–74
energetic
values
(approximately
35
MJ/kg).
Also,
hydrochars
showed
noticeable
energy
densification
compared
raw
materials,
where
C
HHV
up
73.8
wt.%
30
MJ/kg,
respectively.
addition
co-solvent
water
improves
result
enhanced
stabilization
reactive
intermediates.
Язык: Английский