Conversion of Beechwood Organosolv Lignin via Fast Pyrolysis and In Situ Catalytic Upgrading Towards Aromatic and Phenolic-Rich Bio-Oil
Sustainable Chemistry for the Environment,
Год журнала:
2024,
Номер
6, С. 100107 - 100107
Опубликована: Май 12, 2024
Lignin,
an
abundant
renewable
biopolymer
found
in
plant
cell
walls,
is
enriched
phenolic
units
within
its
complex
molecular
structure.
Unlocking
potential
as
alternative
feedstock
(bio)refining
has
posed
a
long-standing
challenge,
even
though
it
holds
immense
promise
for
replacing
fossil-derived
and
aromatic
compounds.
This
study
focuses
on
fast
pyrolysis
effective
thermochemical
depolymerization
method
of
lignin,
coupled
with
the
situ
catalytic
upgrading
aiming
to
produce
valuable
bio-oil
dealkoxylated
(alkyl)phenolic
Lignin
was
isolated
via
organosolv
process
from
beechwood
sawdust
(hardwood
biomass).
Various
acidic
aluminosilicate
catalysts
(e.g.,
zeolites,
such
ZSM-5,
Beta
USY,
amorphous
silica
alumina)
were
applied,
having
different
Si/Al
ratio,
porous
properties.
Fast
experiments
conducted
fixed-bed
bench-scale
reactor
at
two
distinct
temperatures
(500
600
°C),
employing
contact
times
lignin-to-catalyst
ratios.
Non-catalytic
revealed
that
higher
temperature,
significantly
influences
bio-oil's
composition
yield,
resulting
conversion
initially
formed
alkoxy-phenols
alkyl-phenolic
compounds,
reaching
47%
relative
concentration
oC,
while
also
yielding
high
amount
up
43
wt.%.
Among
tested,
zeolite
ZSM-5
(Si/Al=40)
proved
be
most
efficient,
shifting
chemical
profile
(mainly
BTX)
57%,
owing
unique
microporous
structure
acidity.
Depending
catalyst
type,
balance
between
BTX
monomer
aromatics
naphthalenes
observed.
well
obtained
products
(bio-oil,
non-condensable
gases,
char/coke-on-catalyst)
thoroughly
characterized
using
various
analytical
techniques.
The
results
associated
physicochemical
properties
catalysts,
providing
insights
into
underlying
reaction
mechanisms.
Язык: Английский
Hydrodeoxygenation of Phenolic Compounds and Lignin Bio-Oil Surrogate Mixture over Ni/BEA Zeolite Catalyst and Investigation of Its Deactivation
Catalysts,
Год журнала:
2025,
Номер
15(1), С. 48 - 48
Опубликована: Янв. 7, 2025
Lignin
is
one
of
the
main
structural
components
lignocellulosic
biomass
and
can
be
utilized
to
produce
phenolic
compounds
that
converted
downstream
cycloalkanes
aromatics,
which
are
useful
as
drop-in
road
or
aviation
biofuels.
Within
this
study,
hydrodeoxygenation
model
phenolic/aromatic
surrogate
mixture
simulating
light
fraction
lignin
fast-pyrolysis
bio-oil
was
performed
under
mild
reaction
conditions.
Ni/BEA
zeolite
selected
a
catalyst
investigate
conversion
product
selectivity
alkyl
phenols
(phenol,
catechol,
cresols),
methoxy-phenols
(guaiacol,
syringol,
creosol),
aromatics
(anisole,
1,2,3-trimethoxybenzene)
dimer
(2-phenoxy-1-phenyl
ethanol)
towards
(alkyl)cycloalkanes.
The
eleven
aromatic
then
studied
by
investigating
effect
conditions
(temperature,
time,
H2
pressure,
concentration,
catalyst-to-feed
ratio).
in
range
80–100%,
37–81%
(alkyl)cycloalkane
yield,
being
strongly
dependent
on
complexity/side-chain
group
ring.
Regarding
mixture,
59–100%
achieved,
with
up
72%
yield
C6–C9
cycloalkanes.
Characterization
spent
catalysts
showed
led
carbonaceous
depositions
catalyst,
limited
lower
temperatures
longer
conditions,
while
after
regeneration,
physicochemical
properties
partially
recovered.
Язык: Английский
Advancing biomass valorization with zeolite catalysts: Focus on oxidative transformations
Sustainable Chemistry for the Environment,
Год журнала:
2025,
Номер
unknown, С. 100249 - 100249
Опубликована: Апрель 1, 2025
Язык: Английский
Exploring the hydrodeoxygenation of lignin β-O-4 dimer model compound and bio-oil by DFT and experimental studies
Molecular Catalysis,
Год журнала:
2025,
Номер
580, С. 115134 - 115134
Опубликована: Апрель 16, 2025
Язык: Английский
Production of high-carbon-number hydrocarbon bio-aviation fuels via catalytic hydrogenation of vanillin and non-catalytic condensation: a mechanistic study with DFT and experimental insights
Green Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Lignocellulose
or
lignin
present
significant
potential
as
sustainable
feedstocks
to
replace
petroleum-derived
resources
through
catalytic
upgrading.
Язык: Английский
Sustainable Liquid‐Organic‐Hydrogen‐Carrier‐Based Hydrogen‐Storage Technology Using Crude or Waste Feedstock/Hydrogen
Advanced Energy and Sustainability Research,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 25, 2024
For
liquid
organic
hydrogen
carrier
(LOHC)
technology
to
be
competitive
with
other
H
2
‐storage
methods,
it
is
crucial
reduce
the
cost
of
LOHC
materials
occupying
high
proportion
embodied
energy
required
for
system
implementation.
Promising
approaches
are
convert
crude
or
waste
feedstock
into
and
utilize
sources
obtained
from
various
routes.
Thus,
in
this
review,
state‐of‐the‐art
advances
sustainable
LOHC‐based
storage
using
feedstock,
associated
their
conversion
materials,
coupling
obtain
high‐purity
without
separation
purification
highlighted.
Petroleum
like
light
cycle
oil
pyrolysis
fuel
used
after
liquid–liquid
extraction,
combined
distillation/hydroprocessing,
one‐pot
hydrotreating–hydrocracking.
In
case
converting
renewable
resources
(e.g.,
biomass
plastic
waste),
depolymerization
followed
by
hydrodeoxygenation
an
effective
approach.
To
storage,
catalysts
should
designed
synthesized
toward
activating
hydrogenation
reaction
at
lower
temperatures,
along
CO
resistance.
Consequently,
context
provides
guidance
development
accelerate
its
commercialization.
Язык: Английский
Efficient Production of Platform Chemicals from Lignocellulosic Biomass by Using Nanocatalysts: A Review
Reactions,
Год журнала:
2024,
Номер
5(4), С. 842 - 859
Опубликована: Ноя. 4, 2024
This
paper
discusses
significant
advancements
in
using
lignocellulosic
biomass
for
the
sustainable
production
of
biofuels
and
chemicals.
As
fossil-based
resources
decline
environmental
concerns
rise,
emphasizes
role
integrated
biorefineries
producing
renewable
liquid
fuels
high-value
chemicals
from
biomass.
It
highlights
exploring
various
green
pathways
conversion,
with
a
particular
focus
on
nanocatalysis.
Due
to
their
large
surface
area-to-volume
ratio,
nanocatalysts
provide
enhanced
catalytic
activity
efficiency
transformation
processes.
The
review
delves
into
synthesis
value-added
furfural
platform
alongside
hydrogenolysis
5-hydroxymethylfurfural
(5-HMF)
like
2,5-dimethylfuran
(DMF)
2,5-dimethyltetrahydrofuran
(DMTHF).
ultimately
underscores
importance
nanotechnology
achieving
high
yield
selectivity
conversion
process,
positioning
it
as
promising
approach
future
energy
chemical
production.
Язык: Английский