Renewable Energy,
Journal Year:
2024,
Volume and Issue:
230, P. 120880 - 120880
Published: June 26, 2024
This
work
represents
the
first
attempt
to
analyze
kinetics,
thermodynamics
and
reaction
mechanism
of
olive
pomace
(OP)
waste
plastic
materials
(PM)
co-pyrolysis.
Among
PM,
polypropylene
(PP),
polystyrene
(PS),
high
density
(HDPE),
polyvinyl
chloride
(PVC)
poly
(ethylene
terephthalate)
glycol
(PETG)
were
selected.
Non-isothermal
TG
experiments
carried
out
under
inert
conditions
at
four
heating
rates,
namely
5,
10,
20
40
°C/min.
The
kinetic
triplet
for
raw
their
blends
was
determined
using
Starink,
Kissinger-Akahira-Sunose
Ozawa-Flynn-Wall
iso-conversional
models.
Pyrolysis
reactions
explained
by
diverse
models,
depending
on
thermal
degradation
progress.
Results
shown
that
co-pyrolysis
followed
a
complex
multi-step
mechanism.
A
synergistic
effect
detected
during
OP/PM
mixtures.
addition
50
%
(w/w)
OP
biomass
PM
decreased
energy
activation
(Ea)
from
25
all
blends,
except
PVC/OP.
Thermodynamic
analysis
reveals
adding
generally
reduces
barrier
(ΔH),
PS-OP,
improves
efficiency
(ΔG)
facilitating
radical
formation
molecular
chain
cleavage.
As
conclusion,
this
study
may
open
up
new
avenues
valorization
resource
recovery.
Thus,
it
contribute
transition
towards
circular
sustainable
economy,
through
zero
goal.
Energies,
Journal Year:
2025,
Volume and Issue:
18(4), P. 981 - 981
Published: Feb. 18, 2025
The
high
viscosity
and
oxygen
content
of
pyrolysis
crude
oil
hinder
the
advancement
technology.
To
address
issue,
this
study
conducted
hydrodeoxygenation
upgrading
experiments
on
using
hydrothermal
directional
conversion.
A
variable
analysis
was
performed
to
assess
differences
in
effects
based
active
metal
(Ru,
Pt)
supports
(activated
carbon,
Nb2O5,
MgO)
supported
catalyst,
further
investigations
were
catalyst
with
bimetallic
doping
modification.
Optimal
reaction
conditions
determined
by
adjusting
temperature.
Additionally,
conversion
studies
model
compounds
carried
out
elucidate
pathway.
results
indicated
that
Pt/MgO
achieved
highest
yield
stable
combustible
(hydrocarbons,
alcohols,
ethers,
esters,
ketones),
a
17.8
wt%.
Upon
modification
Ni
doping,
increased
49.5%.
effect
improved
an
increase
temperature,
target
26.7
wt%
at
290
°C,
energy
rate
72.6%
selectivity
75.8%.
Moreover,
physicochemical
properties
upgraded
similar
those
ethanol.
All
three
underwent
100%
This
provides
both
experimental
support
theoretical
foundation
for
development
biomass
Polymers,
Journal Year:
2025,
Volume and Issue:
17(6), P. 740 - 740
Published: March 11, 2025
Finding
reliable,
sustainable,
and
economical
methods
for
addressing
the
relentless
increase
in
plastic
production
corresponding
rise
waste
within
terrestrial
marine
environments
has
garnered
significant
attention
from
environmental
organizations
policymakers
worldwide.
This
study
presents
a
comprehensive
analysis
of
low-heating-rate
thermal
degradation
high-density
polyethylene
(HDPE)
conjunction
with
date
seed
powder
(DSP),
utilizing
thermogravimetric
coupled
Fourier
transform
infrared
spectroscopy
(TGA/FTIR),
machine
learning
convolutional
deep
neural
networks
(CDNNs),
multiple
linear
regression
model
(MLRM)
thermokinetics.
The
TGA/FTIR
experimental
measurements
indicated
synergistic
interaction
between
selected
materials,
facilitated
by
presence
hemicellulose
cellulose
DSP
biomass.
In
contrast,
lignin
was
found
to
hinder
at
elevated
temperatures.
application
CDNNs
formulation
training
algorithms,
resulting
an
optimized
architectural
composition
comprising
three
hidden
neurons
employing
27,456
epochs.
modeling
approach
generated
predicted
responses
that
are
closely
aligned
results
(R2
~
0.939)
when
comparing
formulated
MLRM
0.818).
CDNN
models
were
utilized
estimate
interpolated
thermograms,
representing
limits
variability
conditions,
thereby
highlighting
temperature
as
most
sensitive
parameter
governing
process.
Borchardt
Daniels
(BD)
model-fitting
Kissinger–Akahira–Sunose
(KAS)
model-free
kinetic
employed
thermodynamic
parameters
yielded
activation
energy
estimates
ranging
40.419
91.010
kJ·mol⁻1
96.316
226.286
models,
respectively,
while
D2
D3
diffusion
identified
preferred
solid-state
reaction
It
is
anticipated
this
will
aid
manufacturers,
organizations,
identifying
energy-reducing
pathways
end-of-life
plastics.
Journal of Physics Conference Series,
Journal Year:
2025,
Volume and Issue:
2973(1), P. 012017 - 012017
Published: March 1, 2025
Abstract
In
this
study,
lab-scale
plasma-assisted
pyrolysis
was
conducted
in
order
to
convert
some
oil
palm
biomasses.
An
argon
gas
source
used
blow
a
plasma
torch
using
900
W
(12
V,
75
A)
DC
current
source.
Oil
fronds
(OPF),
empty
fruit
bunches
(EFB),
trunks
(OPT),
and
kernel
shells
(PKS)
were
among
the
biomasses
utilized
investigation.
The
treatment
for
8
minutes.
This
produced
solid
products
of
chars,
which
are
dominated
by
carbon
content.
Raman
spectroscopy,
x-ray
diffraction
(XRD),
transmission
electron
microscopy
(TEM),
Fourier
transform
infrared
(FT-IR)
examine
chars.
domination
sp2
hybridization
OPF,
OPT,
PKS
chars
detected
while
dominant
sp3
EFB
char.
Based
on
XRD
characterizations,
different
crystal
structure
characteristics
(trigonal,
cubic,
hexagonal,
amorphous)
EFB,
TEM
analysis,
hexagonal
structures
simple
cubic
identified
abundance
O-H
bonds
C=C
bond
FT-IR.
Therefore,
integrating
whole
analyses,
graphitic
allotropes
determined
OPF
OPT
Different
as
turbostratic
char
Energies,
Journal Year:
2024,
Volume and Issue:
17(14), P. 3526 - 3526
Published: July 18, 2024
This
study
investigates
the
potential
of
utilizing
pyrolysis
byproducts,
including
char
and
non-condensable
gases,
as
an
energy
source
to
promote
autothermal
pyrolysis.
A
total
six
experiments
were
conducted
at
three
distinct
cracking
temperatures,
namely,
450
°C,
500
550
°C.
The
utilized
two
types
biomasses,
i.e.,
100%
pine
chips
75%
mixed
with
25%
refuse-derived
fuels
(RDF).
findings
from
subsequently
incorporated
into
a
process
simulation
on
Aspen
Plus
for
balance
techno-economic
analysis.
results
revealed
that
produced
by
byproducts
only
is
1.453
kW/kg,
which
enough
fulfill
demand
reactor
(1.298
kW/kg).
However,
when
RDF
added,
decreases
1.220
increases
1.750
kW/kg.
Furthermore,
adding
bio-oil’s
lower
heating
value
(LHV).
proposed
scenarios:
optimistic,
conservative,
tragic.
optimistic
has
payback
period
(PBP)
7.5
years
positive
net
present
(NPV).
other
scenarios
unfavorable,
resulting
in
unfeasibility.
