Energy & Environment,
Journal Year:
2024,
Volume and Issue:
unknown
Published: April 26, 2024
Herein,
a
mixture
of
real
polypropylene
(PP)
waste
was
pyrolyzed
with
HZSM-11
catalyst
as
potential
method
to
recover
light
hydrocarbons
(C
≤
12
),
the
feedstock
for
value-added
chemicals
and
fuels,
from
polyolefin
plastic
waste.
Using
in
PP
pyrolysis
noticeably
improved
yield
gas
pyrolysate
oil
compensation
wax
(i.e.
C
>
20
)
solid
residue
particularly
at
higher
temperature.
In
addition,
selectivity
3
–C
PP-waste
mixture-derived
markedly
increased
by
HZSM-11.
The
highest
≈40
wt%
(per
mass
feedstock)
achieved
700
°C
catalyst.
Despite
7.9
coke
deposition
on
after
its
use
mixture,
could
be
reusable
least
three
times
regeneration.
experimental
results
demonstrate
that
has
being
promising
valorize
into
chemicals.
Resources Conservation and Recycling,
Journal Year:
2023,
Volume and Issue:
192, P. 106916 - 106916
Published: Feb. 26, 2023
Plastic
recycling
rate
in
Europe
is
low,
urging
developments
technology
and
strategies
to
increase
circularity.Mechanical
(MR)
has
been
the
reference
for
years,
but
near
future
chemical
(CR)
options
are
expected
contribute
improve
plastic
circularity.This
study
uses
a
material
flow
analysis
(MFA)
at
European
level
provide
quantitative
estimates
of
contribution
CR
technologies
recycling.Ten
most
used
polymer
types
from
five
sectors
selected.A
status
quo
2018
scenario
modelled
compared
potential
scenarios
(in
2030)
waste
treatment,
including
one
that
only
looks
improved
collection,
sorting,
MR
four
exploring
options.The
so-called
'missing
plastics',
i.e.,
generated
currently
not
accounted
statistics,
considered
scenarios.The
MFA
results
by
calculating
circularity
indicators
namely
end-of-life
(EoL-RR),
plastic-to-plastic
rate,
plasticto-chemicals
plastic-to-fuels
rate.The
indicate
optimistic
EoL-RR
2030
73-80%
(sum
plastic-to-chemical
rates,
excluding
plastic-to-fuel
rate),
which
41-46%
MR,
15-38%
19-35%
plastic-to-chemicals.The
highest
achievable
estimated
be
61%
(46%
15%
CR).In
all
scenarios,
3-6%.The
also
estimate
recycled
content
availability
2030,
suggest
closed-loop
processing
plastics'
will
necessary
achieve
targets.
Energy & Environmental Science,
Journal Year:
2023,
Volume and Issue:
16(9), P. 3638 - 3653
Published: Jan. 1, 2023
This
study
analyzes
catalytic
fast
pyrolysis
as
a
conversion
technology
for
mixed
plastic
waste,
highlighting
key
economic
and
environmental
drivers
potential
opportunities
process
improvements.
Journal of Industrial Ecology,
Journal Year:
2023,
Volume and Issue:
27(5), P. 1319 - 1334
Published: July 12, 2023
Abstract
Most
automotive
plastic
waste
(APW)
is
landfilled
or
used
in
energy
recovery
as
it
unsuitable
for
high‐quality
product
mechanical
recycling.
Chemical
recycling
via
pyrolysis
offers
a
pathway
toward
closing
the
material
loop
by
handling
this
heterogeneous
and
providing
feedstock
producing
virgin
plastics.
This
study
compares
chemical
scenarios
APW
regarding
climate
change
impact
cumulative
demand
(CED),
assessing
potential
environmental
advantages.
In
addition,
an
economic
assessment
conducted.
contrast
to
other
studies,
assessments
are
based
on
experiments
conducted
with
actual
fraction.
Mass
balances
composition
reported.
The
experimental
data
combined
literature
up‐
downstream
processes
assessment.
shows
lower
net
(0.57
0.64
kg
CO
2
e/kg
input)
CED
(3.38
4.41
MJ/kg
than
(climate
impact:
1.17
1.25
input;
CED:
6.94
7.97
input),
while
performs
better
economically
(net
processing
cost
of
−0.05
−0.02€/kg
compared
(0.05
0.08€/kg
input).
However,
keeps
carbon
cycle
contributing
circular
economy
reducing
dependence
fossil
feedstocks.
Therefore,
increasing
circularity
through
conflict
between
objectives.
