Fuel,
Journal Year:
2024,
Volume and Issue:
373, P. 132265 - 132265
Published: June 28, 2024
The
pyrolysis
of
sewage
sludge
to
produce
biochar
is
a
promising
method
for
end-treatment.
Key
parameters
influencing
properties
include
temperature,
heat
transfer
rate,
residence
time,
additives,
and
raw
material
types.
Sludge-based
(SBC)
features
porous
structure,
aromatic
compound
composition,
high
absorbency,
stable
chemical
properties,
large
specific
surface
area,
numerous
functional
groups,
making
it
suitable
environmental
applications
such
as
soil
remediation
water
quality
improvement.
However,
SBC
alone
can
pose
risk
due
excessive
heavy
metal
content.
Co-pyrolysis
biomass
with
has
been
shown
mitigate
this
by
fixing
metals
reducing
their
accumulation
in
biochar.
Research
indicates
that
co-pyrolysis
produces
superior
including
larger
better
pore
more
greater
pollutant
adsorption
capacity
compared
alone.
Thus,
sludge-biomass
significant
potential
overcome
the
limitations
single
sludge-based
biochar,
facilitating
large-scale
production
application
management.
Thermal Science and Engineering Progress,
Journal Year:
2023,
Volume and Issue:
42, P. 101863 - 101863
Published: April 28, 2023
Due
to
the
specific
characteristics
of
sewage
sludge
from
food
industry,
including
its
high
fat
content,
treatment
is
quite
complex.
Therefore,
in
this
study,
effect
pre-treatment
processes
torrefaction
(T)
and
hydrothermal
carbonization
(HTC)
on
pyrolysis
industrial
(SS)
vegetable
oil
industry
was
investigated
by
thermogravimetric
analysis.
Kinetic
thermodynamic
analysis
performed
using
Kissinger-Akahira-Sunose
(KAS),
Flynn-Wall-Ozawa
(FWO),
Friedman
(FRI)
iso-conversional
kinetic
models.
In
addition,
influence
water
replacement
whey
process
subsequent
kinetics.
The
activation
energy
(Eα)
values
for
ranged
49
372
kJ/mol.
Pre-treatment
(torrefaction,
carbonization)
increases
significantly:
Eα
torrefied
(T-SS)
hydrothermally
treated
(HTC-SS)
samples
177
689
kJ/mol
161
486
kJ/mol,
respectively.
variations
generally
lower
energies
HTC-SSW
sample
(158–445
kJ/mol)
indicate
that
use
HTC
affects
hydrochar
properties
kinetics
significantly.
According
results,
reflected
better
thermochemical
stability
samples,
as
well
parameters
pyrolysis,
since
pre-treated
(especially
sample,
T-SS)
exhibited
higher
entropies
enthalpies
Gibbs
free
energies.
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.
