Journal of Physics Energy,
Journal Year:
2022,
Volume and Issue:
5(1), P. 014015 - 014015
Published: Dec. 19, 2022
Abstract
Glycerol
organosolv
(GO)
pretreatment
has
been
revealed
to
be
potent
in
selectively
deconstructing
the
lignocellulosic
biomass
and
effectively
enhancing
its
enzymatic
hydrolysis,
but
conventional
solid
washing
GO
lignin
extraction
processes
frequently
consume
large
amounts
of
water,
resulting
additionally
difficulty
recycling
glycerol.
In
this
study,
an
anhydrous
two-step
process
was
explored,
followed
by
membrane
ultrafiltration
glycerol
lignin.
The
results
showed
that
residual
after
atmospheric
(AGO)
necessary
for
subsequent
operation
high-solid
hydrolysis.
Washing
with
ethanol
desirable
as
alternative
water
only
a
low
content
5.2%
resided
substrate.
Membrane
helpful
extracting
AGO
from
liquor,
which
high
81.5%
made
regenerated
cellulose
(cut-off
1
kDa)
under
selected
conditions.
With
characterization
membrane-extracted
lignin,
it
observed
first
time
well-preserved
structure
G/S
type.
Moreover,
enriched
reactive
groups,
i.e.
β
-O-4′
linkages
aliphatic
hydroxyl
very
likely
due
grafting
onto
via
α
-etherification
reaction.
allowed
86%
92%
recovery
∼78%
distillation
energy
savings,
applicable
use
organic
solvents.
International Journal of Biological Macromolecules,
Journal Year:
2024,
Volume and Issue:
264, P. 130518 - 130518
Published: Feb. 28, 2024
Lignin
has
been
overlooked
and
used
as
a
waste
for
long
due
to
its
complex
partially
hydrophobic
structure.
Many
efforts
have
carried
out
overcome
these
deficiencies
apply
it
high-value
product,
which
are
insufficient
reach
the
full
potential
of
lignin
in
various
advanced
applications,
since
they
require
with
procedures
obtaining
more
specific
fine-tuned
chemical
structures.
This
work
focuses
on
differently
structured
hydrophilic
lignins
derived
both
from
Kraft
organosolv
isolation
processes.
The
structures
different
types
were
studied,
effect
structural
differences
modification
processes
their
subsequent
properties
analyzed,
valorizing
application
diverse
purposes.
carboxymethylation
sulfomethylation
reactions
aim
enhancing
polarity
samples,
while
methylation
reaction
aimed
obtain
higher
stability.
physicochemical
analyses
by
FTIR,
GPC,
31P
NMR,
13C
HSQC
verified
effectiveness
conditions
selected,
lower
hydroxyl
content,
substitution
insertion
carboxymetyl,
sulfomethyl
methyl
groups,
therefore
condensed,
aromatic
oxygenated
carbon
While
was
most
efficient
substituting
OH
non-selectivity,
OL
showed
yields
than
KL.
In
terms
thermal
morphological
properties,
analyzed
DLS
TGA
respectively,
observed
that
modified
samples
Z
values,
along
conductivity,
being
sulfomethylated
one
showing
best
results,
also
smallest
particle
size
polydispersity
index.
Finally,
all
T50%
suggesting
better
stability
towards
degradation.
Biomass Conversion and Biorefinery,
Journal Year:
2022,
Volume and Issue:
unknown
Published: Feb. 10, 2022
Abstract
In
this
study,
ethanol
organosolv
treatment
of
oat
husk
and
the
potential
effects
phosphoric
acid
oxalic
as
alternatives
to
sulfuric
were
investigated.
These
acids
determined
effective
obtain
high
quality
lignin
glucan
they
can
be
used
instead
in
solvent
acidification.
To
determine
purity
recovery
both
glucan,
initial
substrate
amount,
solid-to-liquid
ratio,
amount
washing
solutions
also
examined
using
a
one-factor-at-a-time
strategy.
Reducing
(water,
solvent,
or
both)
negatively
affected
recovery,
but
it
did
not
affect
recovery.
The
optimum
conditions
for
pretreatment
at
higher
obtained
with
50%
aqueous
acidified
210
°C
90
min
ratio
1:2.
mixture
evaporated
glucan-rich
hemicellulose-rich
fractions
through
optimized
condition,
4.62
g/L
biomass
containing
10.27%
protein
was
produced
by
cultivation
Aspergillus
oryzae
.
from
value-added
products
such
production,
thus
contributing
sustainable
economy
integrating
lignocellulosic
residues
into
biorefinery.
