GCB Bioenergy,
Год журнала:
2023,
Номер
15(7), С. 900 - 915
Опубликована: Апрель 28, 2023
Abstract
The
development
of
technologies
for
utilizing
biomass
has
attracted
attention
because
can
be
produced
sustainably
worldwide.
Biomass‐derived
2‐methyltetrahydrofuran
(MTHF),
which
is
a
promising
alternative
to
gasoline,
great
market
potential
and
growing
demand.
However,
in
conventional
conversion
processes,
the
minimum
selling
price
(MSP)
biochemicals
not
economically
acceptable.
Co‐production
increase
economics
utilization.
Herein,
we
developed
process
co‐producing
MTHF
1,4‐pentanediol
(1,4‐PDO)
from
lignocellulosic
biomass.
After
fractionation,
cellulose
hemicellulose
were
converted
levulinic
acid
(LA),
lignin
was
used
heat
electricity
generation.
LA
then
γ‐valerolactone
(GVL).
As
platform
material
co‐production,
GVL
into
1,4‐PDO
each
subsystem.
split
ratio
controlled
efficiently
produce
according
conditions.
Additionally,
performed
techno‐economic
life‐cycle
assessment
(TEA
LCA,
respectively)
process.
MSP
calculated
based
on
TEA
results,
environmental
impacts
quantitatively
LCA
results.
We
integration
using
pinch
analysis
reduced
energy
requirement
proposed
key
cost
drivers
factors
identified
via
sensitivity
analyses.
Consequently,
during
processing
2000
ton/day
corn
stover
(raw
lignocellulose),
as
$2.64/GGE
(gasoline
equivalent),
representative
such
climate
change
fossil
depletion
−0.296
kg
CO
2
eq
−
0.056
oil
eq,
respectively.
result,
commercial
production
with
sustainability.
serve
solution
demand
need
more
sustainable
Green Chemistry,
Год журнала:
2023,
Номер
25(24), С. 10338 - 10365
Опубликована: Янв. 1, 2023
This
review
outlines
recent
progress
in
the
photocatalytic
conversion
of
biomass
into
organic
acids
with
an
emphasis
on
mechanisms
involved
and
strategies
for
rational
design/regulation
systems
to
enhance
performance.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2023,
Номер
11(22), С. 8294 - 8307
Опубликована: Май 19, 2023
Reversible
crosslinking
offers
an
attractive
strategy
to
modify
and
improve
the
properties
of
polymer
materials
while
concurrently
enabling
a
pathway
for
chemical
recycling.
This
can,
example,
be
achieved
by
incorporating
ketone
functionality
into
structure
enable
post-polymerization
with
dihydrazides.
The
resulting
covalent
adaptable
network
contains
acylhydrazone
bonds
cleavable
under
acidic
conditions,
thereby
providing
reversibility.
In
present
work,
we
regioselectively
prepare
novel
isosorbide
monomethacrylate
pendant
levulinoyl
group
via
two-step
biocatalytic
synthesis.
Subsequently,
series
copolymers
different
contents
levulinic
monomer
methyl
methacrylate
are
prepared
radical
polymerization.
Using
dihydrazides,
these
linear
then
crosslinked
reaction
groups
in
side
chains.
Compared
prepolymers,
networks
exhibit
enhanced
glass
transition
temperatures
thermal
stability,
up
170
286
°C,
respectively.
Moreover,
dynamic
efficiently
selectively
cleaved
conditions
retrieve
polymethacrylates.
We
next
show
that
recovered
polymers
can
again
adipic
dihydrazide,
thus
demonstrating
circularity
materials.
Consequently,
envision
isosorbide-based
polymethacrylate
have
great
potential
field
recyclable
reusable
biobased
thermoset
polymers.
Abstract
Biodiesel
produced
from
different
edible
and
non‐edible
feedstocks
is
a
viable
alternative
option
for
fueling
combustion
engine.
However,
the
widespread
use
of
sources
biodiesel
production
may
lead
to
food
versus
fuel
controversy.
Oil
feedstock
best
possible
solution
problems
that
inhibits
on
commercial
scale.
This
study
presents
potential
production.
Several
aspects
such
as
extraction
technologies
used
extracting
oil
pathways
are
discussed.
The
quality
should
be
assured
before
its
commercialization
by
physical
chemical
characterization
techniques
used.
In
particular,
emission
comparison
derived
Based
this
study,
have
produce
but
still
it
has
long
way
go.
due
in
R&D
phase
needs
more
research
eliminate
additional
treatment
steps
compared
economic
aspects.
Furthermore,
there
been
trade
off
properties
biodiesels
which
must
removed
or
evaluated
pilot
scale
investigations
commercialization.
Molecules,
Год журнала:
2024,
Номер
29(1), С. 242 - 242
Опубликована: Янв. 2, 2024
Biomass-derived
furanics
play
a
pivotal
role
in
chemical
industries,
with
2-methyltetrahydrofuran
(2-MTHF),
hydrogenated
product
of
levulinic
acid
(LA),
being
particularly
significant.
2-MTHF
finds
valuable
applications
the
fuel,
polymer,
and
sectors,
serving
as
key
component
P-series
biofuel
acknowledged
renewable
solvent
for
various
processes.
Numerous
research
groups
have
explored
catalytic
systems
to
efficiently
selectively
convert
LA
2-MTHF,
using
diverse
metal-supported
catalysts
different
solvents
under
batch
or
continuous
process
conditions.
This
comprehensive
review
delves
into
impact
catalysts,
encompassing
co-metals
co-catalysts,
on
synthesis
from
LA.
The
article
also
elucidates
influence
reaction
parameters,
such
temperature,
type
quantity
hydrogen
source,
time.
Furthermore,
provides
insights
mechanisms
all
documented
systems.
International Journal of Molecular Sciences,
Год журнала:
2022,
Номер
23(3), С. 1106 - 1106
Опубликована: Янв. 20, 2022
Levulinic
acid
and
its
esters
(e.g.,
ethyl
levulinate,
EL)
are
platform
chemicals
derived
from
biomass
feedstocks
that
can
be
converted
to
a
variety
of
valuable
compounds.
Reductive
amination
levulinates
with
primary
amines
H2
over
heterogeneous
catalysts
is
an
attractive
method
for
the
synthesis
N-alkyl-5-methyl-2-pyrrolidones,
which
environmentally
friendly
alternative
common
solvent
N-methyl-2-pyrrolidone
(NMP).
In
present
work,
catalytic
properties
different
nickel
phosphide
supported
on
SiO2
Al2O3
were
studied
in
reductive
EL
n-hexylamine
N-hexyl-5-methyl-2-pyrrolidone
(HMP)
flow
reactor.
The
influence
phosphorus
precursor,
reduction
temperature,
reactant
ratio,
addition
acidic
diluters
catalyst
performance
was
investigated.
Ni2P/SiO2
prepared
using
(NH4)2HPO4
reduced
at
600
°C
provides
highest
HMP
yield,
reaches
98%.
Although
presence
sites
sufficient
hydrogenating
ability
important
factors
determining
pyrrolidone
selectivity
also
depends
specific
features
adsorption
active
sites.
Materials,
Год журнала:
2023,
Номер
16(7), С. 2864 - 2864
Опубликована: Апрель 4, 2023
The
industrial
use
of
biomass,
e.g.,
for
the
production
platform
chemicals
such
as
levulinic
acid,
became
increasingly
important
in
recent
years.
However,
efficiency
these
processes
was
reduced
by
formation
insoluble
solid
waste
products
called
humins.
Herein,
humins
from
various
carbohydrates
investigated
under
different
process
conditions,
order
to
obtain
information
about
structure
and
mechanism.
During
this
process,
new
potential
structural
fragments
were
identified.
Subsequently,
produced
oxidatively
converted
low-molecular-weight
carboxylic
acids
with
polyoxometalate
catalysts.
experiments
showed
that
sugars
acetic
acid
ethanol
only
lead
a
small
amount
humins,
which
also
structurally
most
suitable
conversion
acids.
main
oxidative
valorisation
formic
CO2,
respectively,
our
results
indicate
certain
functional
groups
preferentially.
These
findings
will
help
improve
biomass
enabling
an
overall
more
efficient
thermo-sensitive
feedstock
carbohydrates.
