Bioplastics
are
increasingly
replacing
traditional
plastics
in
many
sectors,
but
the
legislative
and
operative
frameworks
for
their
disposal
remain
unclear:
they
should
be
collected
treated
together
with
organic
fraction
of
municipal
solid
waste
(OFMSW),
often
do
not
biodegrade
satisfactorily
plants
that
treat
OFMSW.
This
work
focuses
on
a
type
cellulose
diacetate
employed
eyewear
industry
to
analyse
hydrothermal
carbonization
(HTC)
as
pre-treatment
before
anaerobic
digestion
(AD).
The
results
show
HTC
can
hydrolyse
this
bioplastic
even
at
moderate
temperatures,
reaching
an
almost
total
dissolution
liquid
phase
210
°C
and,
higher
producing
hydrochar.
When
slurry
obtained
is
fed
mesophilic
or
thermophilic
AD,
both
amount
production
rate
biogas
enhanced
compared
raw
bioplastic.
In
particular,
conditions,
produced
undergoes
least
threefold
increase
untreated
diacetate.
Thus,
confirms
prior
step
may
suitable
approach
enhance
energy
recovery
bioplastics
through
AD.
Energy Conversion and Management,
Год журнала:
2024,
Номер
302, С. 118093 - 118093
Опубликована: Фев. 1, 2024
It
is
crucial
to
find
sustainable
and
renewable
fuel
sources
because
traditional
fossil
fuels
are
running
out
pollution
levels
rising.
In
this
context,
biocrude
derived
from
biomass
emerges
as
a
promising
alternative,
with
hydrothermal
liquefaction
(HTL)
playing
pivotal
role
in
transformation.
HTL's
versatility
converting
wide
range
of
or
waste
materials
into
especially
notable.
Therefore,
comprehensive
review
focused
on
the
latest
advancements
HTL
technology,
including
its
potential
process
various
materials,
resulting
high
yields
(up
60–86%
different
types).
The
study
explored
such
effects
catalysts
processes,
scalability
for
commercializing
continuous
aqueous
phase
recycling.
also
integration
machine
learning
optimization,
offering
insights
how
these
advanced
computational
techniques
can
enhance
efficiency
output
quality.
subsequent
hydrotreatment
emerge
key
technologies
utilizing
source.
This
not
only
highlights
current
state
refining
upgrading
but
stresses
need
ongoing
development
domains.
presented
transformative
solution
energy
sector,
alternative
while
tackling
impurities
heteroatoms
management
challenges.
concluded
by
underscoring
practical
implications
advancements,
suggesting
roadmap
future
research
field.
Polymers for Advanced Technologies,
Год журнала:
2023,
Номер
35(1)
Опубликована: Ноя. 2, 2023
Abstract
Polyvinyl
chloride
(PVC)
recycling
is
crucial
for
mitigating
the
environmental
impact
of
PVC
wastes,
which
take
decades
to
decompose
in
landfills.
This
review
examines
current
state
processes,
focusing
on
challenges
and
future
research
opportunities.
It
explores
types
sources
including
post‐consumer,
industrial,
construction
wastes.
Conventional
methods
such
as
mechanical,
thermal,
chemical
are
discussed,
highlighting
their
advantages,
limitations,
successful
applications.
Furthermore,
recent
advances
recycling,
biological,
plasma‐assisted,
solvent‐based
explored,
considering
potential
benefits
challenges.
The
emphasizes
European
context
region
has
implemented
regulatory
initiatives
collaborations.
points
out
Circular
Economy
Action
Plan
directives
targeting
waste
management,
have
promoted
established
a
supportive
framework.
Challenges
technologies,
low
yield
high
energy
consumption,
identified.
calls
development
efficient
cost‐effective
along
with
improvements
infrastructure
consumer
awareness.
Assessing
economic
impacts,
significantly
reduces
greenhouse
gas
emissions
conserves
resources
compared
virgin
production.
include
job
creation
reduced
raw
material
costs.
Fuel Communications,
Год журнала:
2023,
Номер
18, С. 100103 - 100103
Опубликована: Дек. 17, 2023
The
significant
rise
in
plastic
consumption
and
waste
generation,
coupled
with
the
urgent
need
for
sustainable
energy
solutions,
has
led
to
innovative
research
seeking
convert
into
valuable
resources.
This
review
focuses
on
application
of
hydrothermal
carbonization
as
a
promising
technique
transforming
products.
It
highlights
suitability
conversion,
presents
recent
reports
showing
results,
prospects,
range
potential
hydrochar
applications,
including
solid
recovered
fuels,
catalysts,
direct
carbon
fuel
cells
supercapacitors.
further
challenges
utilizing
across
different
which
include
feedstock
variability,
contamination,
scalability,
material
properties,
environmental
considerations.
optimized
synthesis
methods,
stable
performance,
long-term
sustainability
is
also
emphasized.
critical
evaluation
applications
can
contribute
advancing
management
renewable
production.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(24), С. 9257 - 9267
Опубликована: Июнь 4, 2024
Bioplastics
are
produced
in
growing
amounts
due
to
their
environmental
benefits,
but
disposal
routes
remain
ambiguous.
A
hydrothermal
treatment
(HT)
may
be
a
sustainable
process
improve
the
fate
of
waste
bioplastics,
nearly
no
information
is
available
on
how
they
respond
it.
In
this
work,
HT
biodegradable
bioplastics
was
performed,
and
resulting
solid
liquid
products
were
characterized
by
elemental
analysis,
analytical
pyrolysis-based
techniques,
ion
chromatography,
gas
chromatography
coupled
with
mass
spectrometry.
We
selected
tableware
based
polylactic
acid
(PLA),
cellulose,
Mater-Bi
(MB)
performed
at
160–200
°C.
MB
identified
as
mixture
PLA
polybutylene
succinate
(PBS).
Higher
temperatures
enhanced
solubilization,
which
very
marked
for
minor
cellulose.
Characterization
residues
revealed
that
quantitatively
degraded
180
°C
above,
while
cellulose
could
never
fully
degraded.
The
analysis
aqueous
phases
from
presence
an
array
oligomers
PBS
low
corresponding
monomers
(lactic
succinic
acid)
high
temperatures:
recovery
represent
way
give
new
life
bioplastics.
Renewable Energy,
Год журнала:
2023,
Номер
211, С. 269 - 278
Опубликована: Апрель 30, 2023
The
article
contextualizes
and
expands
upon
research
related
to
oxidative
liquefaction
of
wind
turbine
blades
for
resin
degradation
glass
fiber
recovery,
presented
at
the
17th
SDEWES
conference
series
on
Sustainable
Development
Energy,
Water
Environmental
Systems
2022.
effect
five
different
parameters,
including
reaction
temperature,
residence
time,
pressure,
waste-to-liquid
ratio,
oxidant
concentration,
degradation,
has
been
studied
in
detail.
Experiments
were
performed
temperature
range
250
°C–350
°C
with
a
time
30–90
min,
pressure
20–40
bar,
ratio
5–25%,
concentrations
15–45%
by
weight.
maximum
yield
achieved
was
95–100%
against
combinations
tested
its
minimum
value
43%,
but
detailed
analysis
revealed
that
is
key
parameter
affecting
yield.
In
addition,
energy
consumption
one
important
parameters
determining
economic
feasibility
process,
so
optimization
experimental
plan
based
also
identify
most
suitable
conditions
support
implication
process
larger
scale.
Energy Conversion and Management,
Год журнала:
2024,
Номер
304, С. 118228 - 118228
Опубликована: Фев. 23, 2024
Poly(vinyl
chloride)
(PVC)
is
globally
the
third
most
produced
plastic,
but
recycling
PVC
waste
through
mechanical
means
difficult.
Due
to
high
presence
of
chlorine
in
PVC,
it
unsuitable
for
both
pyrolysis
and
combustion.
Consequently,
there
a
need
explore
innovative
methods
harnessing
its
energy
potential.
Hydrothermal
liquefaction
(HTL)
topic
growing
interest
literature
chemical
plastic
or
conversion
into
liquid
carriers.
In
this
work
an
sequential
hydrothermal
processing
strategy
was
tested
oil
production
from
PVC.
at
loadings
(20
wt.%)
first
processed
under
subcritical
conditions
produce
chlorine-free
solid,
which
then
liquefied
supercritical
conditions.
Different
temperatures
were
dechlorination
stage,
300
°C
99%
removed,
while
94%
carbon
remained
solid
residue.
The
mechanism
behind
solid's
formation
investigated
by
assessing
activation
energies,
with
addition
KOH
as
neutralizing
agent
(120
kJ/mol)
without
(186
kJ/mol).
screened
HTL
stage
(420–480
°C),
maximum
dechlorinated
47%,
mass
yield
10%.
Overall,
phase
demonstrated
potential
technology
producing
material
density.
subsequent
step
partially
valorized
aromatic-rich
phase.
