Hydroisomerization
of
n-alkanes
plays
an
important
role
in
fuel
and
lubricants
processing.
Bifunctional
catalysts
with
ultralow
platinum
loading
have
recently
been
reported
successively
for
hydroisomerisation.
Herein,
the
were
prepared
successfully
different
methods
to
improve
catalytic
performance.
The
conversion
0.01%Pt1@CeOx/SAPO-11
by
co-calcination
method
(0.01%Pt1@CS-c)
was
71.4%,
25%
higher
than
other
precipitation
method.
TOFPt
0.01%Pt1@CS-c
13115
h-1,
reaching
advanced
level
same
kind
catalyst.
Combined
structural
characterization
catalysts,
especially
XPS
TEM,
quality
phase
boundary,
or
intersurface,
between
ceria
zeolite
found
significantly
different.
conjunction
boundary
directly
affected
spillover
rate
intermediate
species,
which
further
led
apparent
activity
differences.
In
addition,
possible
reaction
discussed,
rather
just
as
a
carrier
active
metal
atoms.
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(11), P. 9262 - 9279
Published: May 28, 2024
Hydroisomerization
catalyst
is
the
key
of
hydroisomerization
process,
which
a
bifunctional
composed
acidic
support
and
metal
components.
In
this
work,
research
progress
catalysts
was
reviewed
first
from
two
aspects:
The
supports
components
used
to
prepare
in
recent
years
were
introduced,
their
advantages/disadvantages
summarized.
SAPO-11
molecular
sieve
most
commonly
suitable
for
catalyst.
synthesis
methods
influencing
factors
sieves
introduced
detail,
modification
Meanwhile,
effects
pore
structure,
acidity,
crystal
size
on
SAPO-11-based
regulation
emphatically
introduced.
Finally,
development
direction
n-alkane
(carbon
number
≤
16)
prospect
summarized
prospected.
This
review
helpful
understand
status
as
well
sieve.
future
put
forward.
It
expected
provide
reference
researchers
field.
Crystal Growth & Design,
Journal Year:
2025,
Volume and Issue:
25(5), P. 1605 - 1613
Published: Feb. 14, 2025
Eight
calcined
ZSM-48-type
materials,
selected
for
their
diversity,
have
been
examined
crystallographically
to
determine
whether
they
can
be
described
in
the
same
way
as
RUB-58
(framework
type
RFE),
with
blocks
of
a
single
framework
structure
separated
by
shear
planes.
In
RUB-58,
only
one
is
present,
but
it
adopt
either
two
origins
related
exactly
one-half
unit
cell
along
channel
direction.
The
connect
another
seamlessly
well-defined
eight
materials
were
synthesized
different
laboratories
using
seven
organic
structure-directing
agents
under
variety
conditions.
At
first
glance,
diffraction
patterns
are
similar,
reflection
intensities
and
peak
shapes
differ.
Analysis
structures
revealed
that
indeed
all
refined
structural
model.
Only
amount
shifted
widths
(arising
primarily
from
crystallite
sizes)
Comparison
generated
several
series
disorder
models
(using
polymorphs)
measured
ones
shows
those
single-framework
model
yield
best
matches.
Geometric
optimization,
simulations
planes
morphology
suggest
plane
(110)
most
likely
one.
These
results
indicate
(involving
polymorphs),
which
has
assumed
nearly
40
years,
probably
does
not
exist.
