ChemSusChem,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 23, 2024
The
synthesis
of
biofuel
γ-valerolactone
(GVL)
from
accessible
biomass
is
an
attractive
and
challenging
goal.
Here,
we
report
efficient,
one-pot,
mild
strategy
for
the
efficient
production
GVL
various
saccharides
without
using
any
homogeneous
acid
as
a
co-catalyst
molecular
hydrogen
donor.
A
versatile
porous
tin-containing
material
(Sn(M)-S)
was
designed
individual
heterogeneous
catalyst.
As
high
68.4
%
yield
form
glucose
achieved
in
presence
ammonia
borane
solid
donor
under
conditions,
with
yields
76.2
%,
68.9
62.5
52.2
being
obtained
fructose,
sucrose,
cellobiose,
cellulose,
respectively.
synergistic
effect
Sn
sulfonic
group
Sn(M)-S
not
only
provides
appropriate
Lewis
sites
to
promote
isomerization
into
fructose
but
also
affords
abundant
Brønsted
following
conversion
steps.
Moreover,
Sn(M)-S(1)
showed
good
stability
reusability
during
consecutive
recycles.
ACS Omega,
Journal Year:
2025,
Volume and Issue:
10(7), P. 7069 - 7076
Published: Feb. 17, 2025
A
novel
Sc2O3–SiO2
catalyst
was
explored
and
evaluated
for
the
upgrade
of
ethanol
acetaldehyde
to
butadiene.
Notably,
with
a
Sc/Si
molar
ratio
0.06
demonstrated
exceptional
performance,
exhibiting
highest
selectivity
81.7%
butadiene
alongside
10.2%
butanol.
When
increased
0.3,
butanol
30.0%.
To
elucidate
underlying
factors
governing
these
results,
detailed
characterizations
catalysts
structure
acidic–basic
properties
were
conducted
materials.
The
analyses
revealed
that
higher
percentage
strong
acidic
sites
in
total
conducive
yield,
while
density
basic
correlated
selectivity.
ChemPlusChem,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 4, 2025
Abstract
Research
results
about
the
structure,
acid‐base,
redox,
and
adsorption
characteristics
of
zinc(yttrium)‐containing
dealuminated
BEA
zeolites
(Si/Al=1000),
Zn(Y)SiBEA
their
catalytic
properties
in
propane
dehydrogenation
with
CO
2
(CO
‐PDH)
are
presented.
The
catalysts
were
prepared
through
a
two‐step
procedure
involving
complete
dealumination
zeolite
followed
by
introduction
Zn
2+
Y
3+
cations
into
vacant
T‐atom
sites,
impregnation.
samples
obtained
characterized
using
XRD,
XPS,
29
Si
DP
MAS
NMR,
low‐temperature
N
ad/desorption,
TPR‐H
,
C
3
H
8
/C
6
NH
)‐TPD,
FTIR‐Py
techniques.
influence
zinc
content
yttrium
on
functional
surface
activity/selectivity
(Zn
1.0
‐,
2.0
SiBEA)
‐PDH
process
analyzed.
balanced
acid‐base
determine
‐mediated
to
propene.
Propane
conversion
propene
selectivity/yield
over
higher
compared
direct
(without
).
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(33), P. 12313 - 12327
Published: Aug. 5, 2024
The
direct
ethanol-to-butadiene
(ETB)
reaction
is
a
complex
tandem
reaction,
and
the
precise
control
of
multifunctional
active
sites
key
to
improving
production
butadiene.
Considering
fact
that
synergistic
effect
Zr–Al
dual
centers
hydrophobicity
carbon
surface
are
beneficial
for
ETB
Zr/Al–C
catalyst
has
been
prepared
via
initial
wet
impregnation
using
zirconium
nitrate
as
precursor
mesoporous
alumina–carbon
support.
obtained
zirconia
nanoparticles
uniformly
dispersed
on
with
mean
particle
size
about
3.5
nm
due
confinement
channels
strong
interaction
between
alumina
zirconia.
10Zr/Al–C
loading
10
wt
%
exhibits
much
higher
butadiene
selectivity
(58
vs
6.2%)
ethanol
conversion
(95
70%)
compared
Al–C
at
375
°C
under
space
velocity
4.74
h–1,
formation
zirconia–alumina
solid
solution.
Moreover,
increase
Zr
led
increased
medium
acid
decreased
various
oxygen
vacancies,
which
affected
selectivity.
It
was
found
an
appropriate
acid/medium
ratio
0.43
base/total
base
0.17
were
balance
each
step,
necessary
achieve
high
recycling
studies
showed
could
maintain
89%
50%
after
running
120
h.
provides
efficient
method
reaction.
