Journal of Engineering and Applied Technology,
Год журнала:
2023,
Номер
4(2), С. 98 - 105
Опубликована: Сен. 16, 2023
A
simple
thermal
and
catalytic
degradation
of
polyethylene
plastic
waste
has
been
carried
out
to
produce
alternative
liquid
fuel.
Plastic
1500
grams
was
pyrolyzed
at
a
specific
temperature
450
°C.
The
gases
were
condensed
in
water-cooled
condenser
collected
container.
Energy
balance
calculation
done
where
cracking
with
Y
zeolite
as
catalyst
seemed
be
the
best
because
generated
energy
from
oil
already
higher
than
required
electric
supplied
for
cracking.
However,
several
improvements
must
always
made
order
save
more
create
result
commercialization.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(50)
Опубликована: Авг. 20, 2024
Abstract
The
escalating
issue
of
plastic
waste
generation
has
prompted
the
search
for
an
effective
solution
to
address
these
challenges.
In
this
study,
we
present
a
novel
plasma‐enabled
strategy
rapid
breakdown
various
types
wastes,
including
mixtures,
into
high‐value
carbon
nanomaterials
and
hydrogen.
H
2
yield
selectivity
achieved
through
implemented
catalyst‐free
are
14.2
5.9
times
higher,
respectively,
compared
those
obtained
with
conventional
thermal
pyrolysis
under
similar
conditions.
It
is
noteworthy
that
plasma
alone
approach
yields
significantly
higher
energy
(g
H2
/kWh)
other
processes.
By
coupling
catalytic
process,
employing
1
wt
.
%
M
/CeO
(
=Fe,
Co,
Ni)
atomically
dispersed
catalysts
can
further
enhance
hydrogen
production.
Specifically,
Co/CeO
catalyst
demonstrated
excellent
performance
throughout
10
cycles
decomposition,
achieving
highest
46.7
mmol/g
(equivalent
64.4
theoretical
production)
nearly
100
atom
recovery
efficiency
at
7
th
cycle.
Notably,
over
Fe
on
CeO
surface
(1
Fe/CeO
)
in
integrated
plasma‐thermal
process
comparable
particles
(10
).
This
outcome,
single‐atom
catalysts,
offers
promising
avenue
cost‐effective
efficient
chemical
recycling.
Through
combination
experimental
computational
efforts,
have
provided
in‐depth
understanding
mechanisms
investigated
single
developed
process.
innovative
straightforward
provides
expedient
continuously
converting
diverse
streams,
mixed
contaminated
sources,
products
conducive
circular
economy.
Environmental Research,
Год журнала:
2024,
Номер
247, С. 118244 - 118244
Опубликована: Янв. 22, 2024
The
usage
and
disposal
of
highly
abundant
single-use
multilayered
plastics
contribute
to
significant
ecological
problems.
thermochemical
recovery
these
useful
products
chemicals
provides
opportunity
for
positive
economic
environmental
impacts.
Most
previous
research
use
idealised
unrepresentative
feedstocks.
To
address
this,
various
mixed
waste
collected
from
the
rejected
fraction
a
municipal
facility
in
Ghana
were
pyrolyzed
at
varying
temperatures
450,
500
550
°C
their
yields
compared.
obtained
chemical
analysed
using
several
different
techniques.
Energy
carbon
balances
processes
produced
CHNS
energy
content
oil
compositional
results
pyrolysis
gas
fraction,
latter
which
was
measured
by
Gas
Chromatography
Thermal
Conductivity
Detection
(GC-TCD).
oils
further
assessed
via
Mass
Spectrometry
(GC-MS)
identify
available
valuable
compounds.
formed
contained
approximately
40%
light
hydrocarbons
(C6
–
C11),
18%
middle
(C11
C16)
42%
heavy
hydrocarbon
compounds
(C16+).
optimal
yield
65.9
±
0.5%
low
heating
value
44.7
0.1
MJ/kg
recorded
highest
°C,
respectively.
findings
provide
indication
that
is
fitting
solution
plastics.
Angewandte Chemie,
Год журнала:
2024,
Номер
136(50)
Опубликована: Авг. 20, 2024
Abstract
Die
stetig
steigende
Menge
an
Kunststoffabfällen
erfordert
effektive
Lösungen
zur
Bewältigung
dieser
Herausforderung.
In
Studie
stellen
wir
eine
neuartige
plasmagestützte
Strategie
schnellen
Zersetzung
verschiedener
Plastikabfälle,
einschließlich
Mischungen,
in
hochwertige
Kohlenstoffnanomaterialien
und
Wasserstoff
vor.
H
2
‐Ausbeute
die
‐Selektivität,
durch
katalysatorfreien
plasmagestützten
Prozesse
erzielt
wurden,
sind
14,2‐
bzw.
5,9‐mal
höher
als
bisher
unter
ähnlichen
Bedingungen
mit
konventioneller
thermischer
Pyrolyse
erreicht
wurde.
Bemerkenswert
ist,
dass
katalysatorfreie
Plasmaprozess
einen
signifikant
höheren
Energieertrag
(gH
/kWh)
im
Vergleich
zu
anderen
Pyrolyseprozessen
liefert.
Durch
Kopplung
von
Plasmapyrolyse
Katalyse
den
Einsatz
atomar
dispergierten
Katalysatoren
1
Gew.‐
%
M
/CeO
(
=Fe,
Co
Ni)
kann
Wasserstoffproduktion
weiter
gesteigert
werden.
Insbesondere
der
Gew.–
%Co/CeO
Katalysator
zeigte
hervorragende
katalytische
Leistung
über
10
Zyklen
Kunststoffabfallzersetzung
hinweg
erreichte
höchste
46,7
mmol/g
plastic
(entsprechend
64,4
theoretischen
‐Ausbeute)
nahezu
100
Wasserstoffatom‐Rückgewinnungseffizienz
7.
Zyklus.
Atomar
dispergiertes
Fe
auf
CeO
‐Oberfläche
(1
Fe/CeO
)
konnte
integrierten
plasma‐thermischen
Katalyseprozess
erzielen
wie
sie
sonst
nur
deutlich
Beladungen
Fe‐Partikeln
(10
wird.
Daher
wurde
demonstriert,
Einzelatom‐Katalysatoren
vielversprechenden
Weg
für
ein
kostengünstiges
effizientes
chemisches
Kunststoffrecycling
darstellen.
Kombination
aus
Experiment
Modellierung
haben
tiefgehendes
Verständnis
katalytischen
Mechanismen
untersuchten
entwickelten
Prozess
erzielt.
Dieser
innovative
unkomplizierte
Ansatz
bietet
vielversprechende
schnelle
kontinuierlichen
Umwandlung
Kunststoffabfallströme,
gemischter
kontaminierter
Quellen,
Produkte,
Kreislaufwirtschaft
Kunststoffe
unterstützen.
Sustainability,
Год журнала:
2024,
Номер
16(8), С. 3429 - 3429
Опубликована: Апрель 19, 2024
The
valorization
of
black
liquor,
a
by-product
produced
in
considerable
quantities
from
the
paper
manufacturing
processes,
has
demonstrated
effectiveness
thermal
reconversion
into
pyrolysis
gas,
bio-oil,
and
bio-char,
sustainable
approach
placing
feedstock
circular
economy
concept.
present
study
focused
on
developing
disposal
solutions
through
energy
recovery
via
at
300
°C
450
when
lignite
nanomaterials
(such
as
Cu-Zn-MCM-41,
Ni-SBA-3,
or
Ni-SBA16)
were
used
catalysts.
results
compared
to
those
non-catalytic
pyrolysis.
use
Cu-Zn-MCM-41
catalyst
proved
be
efficient
for
gas
production,
reaching
55.22
vol%
CH4.
increase
calorific
value
was
associated
with
showing
42.23
MJ/m3
that
process,
which
yielded
39.56
MJ/m3.
bio-oil
resulting
showed
highest
6457
kcal/kg
obtained
other
two
nanocatalysts,
Ni-SBA-3
Ni-SBA-16,
well
raw
material,
had
3769
kcal/kg.
analysis
bio-char
revealed
no
statistically
significant
differences
comparing
outcomes
using
various
suggesting
their
minimal
impact
content.
Defect and diffusion forum/Diffusion and defect data, solid state data. Part A, Defect and diffusion forum,
Год журнала:
2025,
Номер
438, С. 41 - 50
Опубликована: Фев. 10, 2025
Plastic
waste
is
an
environmental
problem
that
widely
discussed
in
the
era
of
globalization.
Catalytic
reforming
can
be
applied
to
improve
quality
plastic
oil.
This
study
aims
properties
liquid
fuel
from
pyrolysis
oil
using
natural
diatomaceous
earth
(NDE)
with
independent
variables,
namely
catalytic
temperature
and
catalyst
mass.
The
NDE
(100
mesh)
was
washed
distilled
water
then
dried
oven
for
24
hours.
characteristics
fuels
were
investigated
gas
chromatography
(GC-MS),
while
analyzed
a
scanning
electron
microscope
(SEM)
better
understand
particle
size
surface
topography.
process
carried
out
fixed-bed
reactor
at
300-500
°C
mass
4-6%.
morphology
appears
have
microporous
structure
honeycomb
shape
5
μm
average
size.
Liquid
products
consist
hydrocarbons
gasoline
range,
based
on
GC-MS
analysis.
shows
increasing
results
higher
product
yields
52.12%
300
4%
could
conversion
PP
into
gasoline.
According
findings,
will
eventually
one
options
completing
plastic.
Clean Technologies,
Год журнала:
2025,
Номер
7(1), С. 20 - 20
Опубликована: Март 5, 2025
Plastic
waste
poses
a
significant
challenge
in
Africa
and
around
the
world,
with
its
volume
continuing
to
increase
at
an
alarming
rate.
In
Africa,
estimated
25–33%
of
daily
is
made
up
plastic,
posing
threat
environment,
marine
life,
human
health.
One
potential
solution
this
problem
waste-to-energy
recycling,
such
as
pyrolysis,
which
involves
conversion
materials
into
oil,
char,
non-condensable
gasses
through
thermochemical
process
absence
oxygen.
Given
abundance
continent’s
energy
challenges,
pyrolysis
offers
sustainable
solution.
This
review
delves
concept
products,
thermodynamics,
endothermic
kinetics,
presenting
it
promising
way
address
plastic
Africa.
Despite
African
Union’s
goal
recycle
waste,
continent
faces
barriers
achieving
target,
including
infrastructural,
economic,
social
difficulties.
It
crucial
implement
strategies
for
managing
mitigate
environmental
degradation
promote
cleaner
healthier
living
environment.
Pyrolysis
technology
highlighted
viable
management,
can
convert
valuable
byproducts
syngas.
Case
studies
from
countries
like
South
Nigeria
demonstrate
scaling
management
issues
while
generating
job
opportunities.
underscores
need
investment,
regulatory
support,
public
awareness
overcome
challenges
unlock
full
Embracing
method
could
lead
economic
benefits
continent.
