Chem & Bio Engineering,
Journal Year:
2024,
Volume and Issue:
1(8), P. 725 - 736
Published: Jan. 31, 2024
A
series
of
metal-doped
MoS2,
including
W-,
V-,
and
Re-doped
are
prepared
via
a
two-step
hydrothermal
method,
which
presents
higher
activity
on
the
depolymerization
enzymatic
hydrolysis
lignin
(EHL)
in
ethanol
as
compared
to
undoped
MoS2.
At
320
°C
for
6
h,
highest
overall
aromatic
monomer
yield
231
mg/g
EHL,
alkylphenols
(A-Ps)
main
products
with
126.5
is
obtained
over
hydrothermally
W-doped
MoS2
W/Mo
molar
ratio
0.1
(Ts-W0.1@MoS2).
The
sample
gives
enhancement
EHL
bio-oils'
heating
value
37.1
MJ/kg
Re
V
modified
Large
distribution
W
atoms
surface
synthesized
samples
leads
than
one-step
samples.
reduction
precursors
preparation
process
promotes
generation
more
Mo5+
Mo6+,
plays
important
roles
improvement
activity.
effect
W-doping
modification
stability
discussed.
anti-sulfur
loss
antioxidant
abilities
significantly
enhanced
after
modification.
In
recyclability
test,
good
incorporation
gradual
oxidation
W-based
sites
improve
balance
catalytic
cycles
among
different
Mo-based
sites,
results
increase
catalyst
stability.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Jan. 25, 2024
Abstract
Thought-out
utilization
of
entire
lignocellulose
is
great
importance
to
achieving
sustainable
and
cost-effective
biorefineries.
However,
there
a
trade-off
between
efficient
carbohydrate
lignin-to-chemical
conversion
yield.
Here,
we
fractionate
corn
stover
into
fraction
with
high
enzymatic
digestibility
reactive
lignin
satisfactory
catalytic
depolymerization
activity
using
mild
high-solid
process
aqueous
diethylamine
(DEA).
During
the
fractionation,
in
situ
amination
achieves
extensive
delignification,
effective
stabilization,
dramatically
reduced
nonproductive
adsorption
cellulase
on
substrate.
Furthermore,
by
designing
tandem
fractionation-hydrogenolysis
strategy,
dissolved
depolymerized
aminated
simultaneously
co-produce
monophenolics
pyridine
bases.
The
represents
viable
scheme
transforming
real
bases
yield,
resulting
from
reactions
cleaved
side
chains
amines.
This
work
opens
promising
approach
valorization
lignocellulose.
ACS Catalysis,
Journal Year:
2024,
Volume and Issue:
14(5), P. 3565 - 3574
Published: Feb. 20, 2024
As
lignin
represents
the
only
renewable
aromatic
organic
resource
in
nature,
search
for
efficient
catalysts
depolymerization
to
produce
functionalized
phenols
with
high
yields
and
selectivity
is
of
great
importance
but
challenging.
Herein,
we
report
an
extremely
low-loaded
atomically
dispersed
Pd
catalyst
anchored
on
a
carbon
carrier
(Pd/ZnO/C)
reductive
catalytic
fractionation
(RCF)
lignocellulose,
from
which
nearly
theoretical
maximum
monomer
yield
(40.7
wt
%),
good
4-n-propenyl-substituted
(62
mol
retention
cellulose
hemicellulose
(92
70
%)
were
realized.
The
calculated
turnover
number
(TON)
(375
molaromatics
molPd–1)
46
times
higher
than
that
commercial
Pd/C
catalyst.
Pd/ZnO/C
possessed
stability
reusability
recycled
RCF
experiments.
plausible
reaction
pathway
current
system
was
proposed
based
detailed
investigation
series
model
compounds.
Using
4-n-propenyl
guaiacol
Pd/ZnO/C-catalyzed
Chinese
fir
(Cunninghamia
lanceolata)
as
substrate,
preparation
symmetrical
monomeric
stilbene
(a
natural
product)
also
achieved.
This
study
provides
feasible
strategy
into
alkene-functionalized
low
cost
efficiency.
Catalysis Communications,
Journal Year:
2024,
Volume and Issue:
187, P. 106864 - 106864
Published: Feb. 1, 2024
Selective
conversion
of
furfural
can
prepare
various
important
chemicals,
marking
it
as
a
prominent
area
interest
in
biomass
utilization.
This
paper
reviews
the
latest
progress
direct
to
1,
5-pentanediol,
2-pentanediol
and
4-pentanediol
which
are
widely
used
high-value
fine
chemicals
with
great
development
potential
application.
The
recent
catalytic
methodologies
employed
synthesis
pentanediols
from
furfural,
encompassing
both
noble
metal
non-noble
catalysts,
have
been
comprehensively
summarized.
Furthermore,
challenges
opportunities
biomass-based
analyzed,
emphasizing
catalyst
importance
sustainable,
eco-friendly
production
for
renewable
resources.
Chemical Reviews,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 17, 2024
In
this
Review,
all
known
chemical
methods
for
the
conversion
of
renewable
resources
into
benzenoid
aromatics
are
summarized.
The
raw
materials
that
were
taken
consideration
CO
Green Chemistry,
Journal Year:
2024,
Volume and Issue:
26(7), P. 3949 - 3957
Published: Jan. 1, 2024
We
demonstrate
a
novel
route
for
the
upcycling
of
poly(phenylene
oxide)
(PPO)
into
dimethylanilines
using
bimetallic
Pd
7
Ru
3
/CNT
catalyst.
This
represents
first
successful
transformation
PPO
nitrogen-containing
compounds.
Energy and Built Environment,
Journal Year:
2024,
Volume and Issue:
unknown
Published: April 1, 2024
Pelletization
reduces
storage
and
transportation
costs
improves
the
thermal
efficiency,
making
it
a
key
technology
for
efficient
utilization
of
biomass
energy.
However,
there
are
few
comparative
investigations
on
how
pelletization
affects
degradation
in
combustion
process.
In
this
study,
five
types
fuels
with
different
mixing
ratios
wood
sawdust
peanut
shells
were
prepared.
Powder
pellet
samples
combusted
using
custom-designed
macro-TGA.
The
characteristics,
kinetics,
thermodynamic
parameters
discussed.
results
show
that
increases
ignition
difficulty
prolongs
time.
Compared
powder
sample,
weight
loss
peak
sample
moved
towards
higher
temperature.
apparent
activation
energy
was
20–38%
lower
than
samples.
prove
pellets
have
better
performances
powders
iScience,
Journal Year:
2024,
Volume and Issue:
27(6), P. 109857 - 109857
Published: May 1, 2024
SummaryThe
exploration
of
renewable
alternatives
to
fossil
fuels
for
chemical
production
is
indispensable
achieve
the
ultimate
goals
sustainable
development.
Chitin
biomass
an
abundant
platform
feedstock
that
naturally
bears
both
nitrogen
and
carbon
atoms
produce
nitrogen-containing
chemicals
(including
organonitrogen
ones
inorganic
ammonia).
The
expansion
biobased
toward
can
elevate
economic
competitiveness
benefit
biorefinery
scheme.
This
review
aims
provide
up-to-date
summary
on
overall
advances
chitin
production,
with
emphasis
design
catalytic
systems.
Catalyst
design,
solvent
selection,
parametric
effect,
reaction
mechanisms
have
been
scrutinized
different
transformation
strategies.
Future
prospectives
also
outlined.Graphical
abstract
Biomacromolecules,
Journal Year:
2024,
Volume and Issue:
25(7), P. 4604 - 4614
Published: June 26, 2024
As
a
natural
renewable
biomacromolecule,
lignin
has
some
inherently
interesting
properties
such
as
fluorescence,
antioxidation,
and
antibacterial
performance.
However,
the
unsatisfactory
fluorescence
biological
activities
have
greatly
limited
their
value-added
large-scale
applications.
In
this
work,
nanoparticles
(LNPs)
grafted
with
vitamin
B1
hybrid
(LEVs)
were
obtained
by
using
ethylenediamine
different
contents
of
through
simple
hydrothermal
method.
The
chemical
structure,
properties,
bioactivity
characterized
to
assess
effects
on
LEVs.
It
was
found
that
performance
synthesized
LEV
particles
improved
increase
in
amount
B1.
free
radical
scavenging
rate
(RSA,
%)
increased
97.8%,
while
rates
reached
up
99.9%.
activity
involved
multiple
combined
mechanisms.
introduction
imine,
amide
groups,
positively
charged
VB1
will
make
it
easier
interact
negatively
bacterial
phospholipid
membranes
cause
lysis
death.
Then,
PVA/LEV
hydrogel
composites
prepared
freezing–thawing
method,
results
showed
hydrogels
had
more
comprehensive
mechanical
antioxidant
activities,
resulting
its
great
potential
be
used
an
efficient
biomedical
material.
