Energy & Fuels,
Год журнала:
2024,
Номер
38(10), С. 8740 - 8748
Опубликована: Май 1, 2024
Pyrolysis
of
lignocellulosic
biomass
and
waste
plastics
has
been
intensely
studied
in
the
last
few
decades
to
obtain
renewable
fuels
chemicals.
Various
pyrolysis
devices
have
developed
for
use
a
laboratory
setting,
operated
either
batch
or
continuously
at
scales
ranging
from
milligrams
per
hour
tenths
g
hour.
We
report
here
design
operation
novel
staged
free-fall
(catalytic)
unit
demonstrate
that
concept
works
very
well
pinewood
sawdust,
paper
sludge,
polypropylene
as
representative
feeds.
The
consists
vertical
tube
with
pretreatment
section,
solid
residue
collection
gas–liquid
separation/collection
catalytic
reaction
section
optionally
perform
ex
situ
upgrading
vapor.
sample
is
placed
tube,
which
transported
by
gravity
through
various
sections
unit.
It
allows
rapid
testing
semicontinuous
feeding
(e.g.,
50
h–1)
opportunity
reactions
under
an
(inert)
gas
N2)
atmospheric
elevated
pressure
bar).
Liquid
yields
noncatalytic
sawdust
optimized
conditions
(475
°C
pressure)
were
63
wt
%
on
intake.
A
lower
yield
51
(on
basis)
was
obtained
likely
due
presence
minerals
CaCO3)
feed.
possibility
using
(pyrolysis
475
550
°C)
also
successfully
demonstrated
sludge
feed
H-ZSM-5
catalyst
(21
biomass).
This
resulted
biphasic
liquid
product
25.6
aqueous
phase
11
oil
phase.
benzene,
toluene,
xylenes
1.9
basis).
Finally,
proven
polyolefin
(polypropylene),
both
500
°C.
thermal,
plastic
high
77
intake,
while
gave
combined
7.8
National Science Review,
Год журнала:
2023,
Номер
10(9)
Опубликована: Авг. 2, 2023
The
unsuitable
disposal
of
plastic
wastes
has
caused
serious
environmental
pollution,
and
finding
a
green
manner
to
address
this
problem
aroused
wide
concern.
Plastic
wastes,
especially
polyolefin
are
rich
in
carbon
hydrogen,
chemical
recycling
shows
distinct
advantages
their
conversion
into
olefins
realizes
closed-loop
cycling
wastes.
should
be
labeled
before
disposal.
necessity
for,
methods
of,
pretreatment
introduced
paper
the
whole
process
is
also
summarized.
As
core
technology
pyrolysis,
including
thermal,
catalytic
solvolysis
processes,
detail
due
its
potential
for
future
development.
We
briefly
describe
feasible
strategies
pyrolytic
oil
refining
life
cycle
assessment
process.
In
addition,
suggestions
perspectives
concerning
industrial
improvement
proposed.
Zeitschrift für Physikalische Chemie,
Год журнала:
2024,
Номер
238(5), С. 797 - 807
Опубликована: Фев. 11, 2024
Abstract
Climate
change
is
a
universal
issue
and
plastic
trash
the
major
cause
of
global
warming.
The
present
study
was
specifically
designed
to
address
escalating
waste
problem,
biodegradation
low-density
polyethylene
(LDPE)
bags
investigated
over
an
8-week
period
using
liquid
culture
approach.
Bacterial
strain
(
Pseudomonas
putida
)
capable
degrading
LDPE
isolated
from
common
garbage
dumping
sites.
identified
after
sequencing
analysis,
as
P.
evaluated
for
its
effectiveness
in
LDPE.
Various
analytical
techniques,
including
weight
loss,
SEM,
FTIR
GC-MS
were
employed
assess
degradation
process.
Results
revealed
that
bacterial
achieved
0.0776
%
degradation.
SEM
confirmed
surface
chemical
changes,
while
GC
MS
by
products
comparison
control
(where
no
bacteria
used).
Resources Environment and Sustainability,
Год журнала:
2023,
Номер
14, С. 100134 - 100134
Опубликована: Авг. 6, 2023
Commodity
plastics
such
as
polyethylene
(PE),
polypropylene
(PP)
and
terephthalate
(PET)
are
some
of
the
common
plastic
wastes
found
in
municipal
wastes.
Lack
technology,
resources,
coherent
programs,
policies,
mismanagement
incomplete
processing
these
plastics,
results
mostly
endinf
up
landfills.
Adopting
a
qualitative
research
approach,
paper
reviewed
PE,
PP
PET
recycling
waste
management
processes
from
selected
developed
developing
countries.
It
was
that
chemical
terms
catalytic
cracking
followed
by
pyrolysis
technologies
more
suitable
for
producing
higher
liquid
oils
whiles
gasification
improves
fuel
gas
yield.
Given
mechanical
requires
less
capital
it
is
option
products
In
cases
where
there
complex
separation
issues,
incineration
energy
recovery
appropriate
but
should
be
used
with
end-of-pipe
treatment
solutions
to
mitigate
against
environmental
impact
incineration.
The
further
highlights
various
opportunities
challenges
involved
pathway,
yields
obtained
each
technique
adaptation
can
made.
Polymers,
Год журнала:
2024,
Номер
16(19), С. 2807 - 2807
Опубликована: Окт. 3, 2024
The
extensive
use
of
polymeric
materials
has
resulted
in
significant
environmental
pollution,
prompting
the
need
for
a
deeper
understanding
their
degradation
processes
and
impacts.
This
review
provides
comprehensive
analysis
environment
impact
on
health
experimental
animals.
It
identifies
common
polymers,
delineates
pathways,
describes
resulting
products
under
different
conditions.
covers
physical,
chemical,
biological
mechanisms,
highlighting
complex
interplay
factors
influencing
these
processes.
Furthermore,
it
examines
implications
products,
using
animals
as
proxies
assessing
potential
risks
to
human
health.
By
synthesizing
current
research,
focuses
studies
related
small
organisms
(primarily
rodents
invertebrates,
supplemented
by
fish
mollusks)
explore
effects
polymer
living
underscores
urgency
developing
implementing
effective
waste
management
strategies.
These
strategies
are
crucial
mitigating
adverse
impacts
degradation,
thus
promoting
more
sustainable
interaction
between
activities
natural
environment.
Journal of Cleaner Production,
Год журнала:
2024,
Номер
447, С. 141500 - 141500
Опубликована: Март 4, 2024
Gasoline-like
hydrocarbon
products
obtained
from
the
distillation
of
different
pyrolysis
oils
produced
solid
wastes
polypropylene
(PP),
polystyrene
(PS),
polyethylene
(PE),
and
their
blends
were
investigated
as
these
materials
together
form
a
good
candidate
for
providing
gasoline
with
properties
approaching
or
fulfilling
standard
requirements
in
various
countries.
A
laboratory-scale
batch
reactor
equipped
reflux
was
used
this
research,
while
fractions
processed
by
further
analyzed
GC-MS.
Fuel
density,
volatility,
curves,
olefin
content,
aromatics
(including
benzene)
oxygenates
analyzed,
scenarios
proposed
reaching
quality.
The
results
compared
to
commercial
sample
Hungary.
It
found
that
gasoline-like
product
low-density
PE
(LDPE)
high-density
(HDPE)
showed
most
similarities
regarding
molecular
distribution.
PS
mainly
aromatics,
yield
PP
contained
53.5
vol%
2,4-dimethyl-1-heptene,
which
severely
affects
presented
fuel
standards.
show
mass
ratio
plastic
process
can
heavily
influence
oil
products'
applicability
transportation
fuel.
optimal
waste
mixture
combined
saturation
content
catalytic
hydrogenation
provide
standard-quality
gasoline.
