Catalytic Upcycling of Polyolefins
Chemical Reviews,
Год журнала:
2024,
Номер
124(16), С. 9457 - 9579
Опубликована: Авг. 16, 2024
The
large
production
volumes
of
commodity
polyolefins
(specifically,
polyethylene,
polypropylene,
polystyrene,
and
poly(vinyl
chloride)),
in
conjunction
with
their
low
unit
values
multitude
short-term
uses,
have
resulted
a
significant
pressing
waste
management
challenge.
Only
small
fraction
these
is
currently
mechanically
recycled,
the
rest
being
incinerated,
accumulating
landfills,
or
leaking
into
natural
environment.
Since
are
energy-rich
materials,
there
considerable
interest
recouping
some
chemical
value
while
simultaneously
motivating
more
responsible
end-of-life
management.
An
emerging
strategy
catalytic
depolymerization,
which
portion
C-C
bonds
polyolefin
backbone
broken
assistance
catalyst
and,
cases,
additional
molecule
reagents.
When
products
molecules
materials
higher
own
right,
as
feedstocks,
process
called
upcycling.
This
review
summarizes
recent
progress
for
four
major
upcycling
strategies:
hydrogenolysis,
(hydro)cracking,
tandem
processes
involving
metathesis,
selective
oxidation.
Key
considerations
include
macromolecular
reaction
mechanisms
relative
to
mechanisms,
design
transformations,
effect
conditions
on
product
selectivity.
Metrics
describing
critically
evaluated,
an
outlook
future
advances
described.
Язык: Английский
Catalytic transformation of plastic waste: Harnessing zeolite for enhanced energy product yield in pyrolysis
Energy Conversion and Management,
Год журнала:
2024,
Номер
318, С. 118897 - 118897
Опубликована: Авг. 9, 2024
Язык: Английский
Consecutive coproduction of H2 and syngas from waste polyolefins derived pyrolysis gas via chemical looping cracking–gasification
Waste Management,
Год журнала:
2025,
Номер
203, С. 114855 - 114855
Опубликована: Май 5, 2025
Язык: Английский
Fabrication of MnAlNiO to boost the conversion of plastic wastes to CNTs for the supercapacitor application
Applied Surface Science,
Год журнала:
2024,
Номер
674, С. 160904 - 160904
Опубликована: Авг. 4, 2024
Язык: Английский
Synthesis of biosurfactants from polyethylene waste via an integrated chemical and biological process
Journal of environmental chemical engineering,
Год журнала:
2024,
Номер
12(5), С. 113322 - 113322
Опубликована: Июнь 12, 2024
Polyethylene,
as
the
predominant
polymer
produced
globally,
poses
significant
environmental
challenges
due
to
its
resistance
natural
decomposition.
In
this
study,
we
introduce
an
innovative
chemicalbiological
approach
for
transforming
waste
polyethylene
into
valuable
biosurfactants.
Our
method
involves
hydrogenolysis
using
specially
designed
Ru/CeO2
catalysts,
which
efficiently
convert
alkanes
while
keeping
methane
selectivity
below
5
%.
This
optimization
ensures
maximum
feed
availability
subsequent
microbial
processes.
Notably,
chemical
intermediates
are
directly
utilized
in
biological
phase,
eliminating
need
intermediate
processing.
Gordonia
sp.
JW21,
selected
exceptional
alkane
degradation
capabilities,
metabolizes
a
wide
range
of
structures,
including
extended
alkyl
chains.
The
process
culminates
generation
high-value
synergistic
strategy
not
only
offers
effective
solution
management
but
also
sets
precedent
sustainable
production
Язык: Английский