During
the
bubbling
fluidized
bed
polymer
pyrolysis
process,
agglomeration
of
inert
materials
frequently
leads
to
defluidization.
To
simulate
this
phenomenon,
a
novel
time-driven
Monte
Carlo
model
is
presented,
which
comprises
two
main
stages:
layering
period
and
period.
The
simulation
results
are
then
compared
with
experimental
data
from
literature.
From
qualitative
analysis
perspective,
effectively
replicate
trends
in
defluidization
times
under
various
operating
conditions.
In
terms
quantitative
analysis,
predicted
exhibit
good
consistency
measured
values
(R2=0.804).
Furthermore,
information
extracted
simulation,
hard
obtain
experimentally,
applied
for
further
discussion.
It
allows
explore
composition
at
moment
different
Additionally,
comparison
particle
size
distributions
same
operational
time
conditions
performed.
general,
developed
provides
robust
foundation
extending
its
application
other
processes
as
well
co-pyrolysis
processes.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(21), P. 13939 - 13949
Published: May 15, 2024
The
structure
tuning
of
bulk
graphitic
carbon
nitride
(g-C3N4)
is
a
critical
way
to
promote
the
charge
carriers
dynamics
for
enhancing
photocatalytic
H2-evolution
activity.
Exploring
feasible
post-treatment
strategies
can
lead
effective
tuning,
but
it
still
remains
great
challenge.
Herein,
supercritical
CH3OH
(ScMeOH)
strategy
(250–300
°C,
8.1–11.8
MPa)
developed
g-C3N4.
This
presented
advantages
time-saving
(less
than
10
min),
high
yield
(over
80%),
and
scalability
due
enhanced
mass
transfer
reactivity
ScMeOH.
During
ScMeOH
process,
molecules
diffused
into
interlayers
g-C3N4
subsequently
participated
in
N-methylation
hydroxylation
reactions
with
intralayers,
resulting
partial
phase
transformation
from
poly(heptazine
imide)-like
(Q-PHI)
as
well
abundant
methyl
hydroxyl
groups.
modified
showed
activity
an
rate
7.2
times
that
pristine
g-C3N4,
which
was
attributed
synergistic
effects
g-C3N4/Q-PHI
isotype
heterojunction
construction,
group
modulation,
surface
area
increase.
work
presents
serves
case
application
fluid
technology
photocatalyst
synthesis.
A
study
of
the
synergistic
effect
Fe
and
Ce
in
microwave-assisted
heterogeneous
Fenton-type
oxidation
low-density
polyethylene
to
value-added
chemicals
over
a
Fe–CeO
2
catalyst.
Waste Management,
Journal Year:
2025,
Volume and Issue:
201, P. 114793 - 114793
Published: April 14, 2025
The
European
Union's
recycling
objectives
of
50
%
for
packaging
by
2025
and
55
2030
are
still
far
from
the
current
rate
37.8
%.
Thermochemical
via
pyrolysis
might
improve
recovery
rates,
especially
challenging
post-consumer
dirty
contaminated
plastics.
Many
studies
focus
on
virgin
plastics
artificial
mixtures
these
to
simulate
real-world
mixed
plastic
waste
scenarios.
This
study
examines
a
sample
pre-sorting
an
Italian
composting
plant
represent
real
within
collection
chain.
contains
plastics,
organics,
paper,
others,
with
making
up
72.18
sample,
primarily
identified
as
LDPE,
PP,
HDPE.
were
tested
individually
mixture,
mirroring
concentrations
observed
original
in
bench-scale
semi-batch
reactor
at
varying
temperatures
(420
°C,
470
520
°C)
residence
times.
analysis
indicated
that
temperature
time
considerably
influence
product
yields
composition,
although
has
more
dominant
effect.
Wax
showed
paraffins
olefins
primary
components,
peak
carbon
number
distribution
C14-C19
range
elevated
temperatures.
Contaminant
wax
substantial
levels
halogens
metals,
posing
challenges
downstream
processes.
Results
mixture
tests
revealed
individual
polymers
could
be
predicted
linear
combination
their
behaviors,
accuracy
10
margin
error
across
examined
lower
