Abstract
Ethylene
and
propylene
are
important
raw
chemicals
that
in
high
demand.
Methanol‐to‐olefins
(MTO)
is
a
promising
alternative
approach
for
producing
ethylene
from
non‐petroleum
feedstocks,
which
the
separation
of
propylene/ethylene
particularly
crucial.
In
this
study,
metal
azolate
framework
(MAF)
[Zn
7
(
μ
‐H
2
O)(tppa)
4
(HCOO)
]
(MAF‐68,
where
H
3
tppa
=
tris(4‐(1‐(tetrahydro‐2
‐pyran‐2‐yl)‐1
‐pyrazol‐4‐yl)phenyl)amine)
has
been
synthesized
with
rare
zinc
pyrazolate
chains
comprising
O
bridges,
namely
Zn
O)(Rpz)
12
(Rpz
−
denotes
groups),
mixtures.
Sorption
experiments
indicated
MAF‐68
shows
remarkable
uptake
4.19
mmol
g
−1
(at
10
kPa),
significantly
higher
than
those
many
other
reported
porous
materials
C
6
/C
separation.
also
selectivity
9.5
2/5
.
Breakthrough
further
confirm
potential
material
high‐purity
(99.9999%)
(99.9999%).
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(10), С. 5563 - 5580
Опубликована: Янв. 1, 2024
The
efficient
removal
of
trace
impurities
is
significant
for
the
production
high-purity
olefins.
This
review
summarizes
latest
advancements
in
deep
purification
ethylene
and
propylene
using
MOF
materials.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(33)
Опубликована: Июнь 6, 2024
Abstract
One‐step
purification
of
ethylene
from
ternary
mixtures
(C
2
H
,
C
4
and
6
)
can
greatly
reduce
the
energy
consumption
separation
process,
but
it
is
extremely
challenging.
Herein,
we
use
crystal
engineering
reticular
chemistry
to
introduce
unsaturated
bonds
(ethynyl
alkyne)
into
ligands,
successfully
design
synthesized
two
novel
Zr‐MOCs
(ZrT‐1‐ethenyl
ZrT‐1‐alkyne).
The
introduction
carbon‐carbon
provides
abundant
adsorption
sites
within
framework
while
modulating
pore
window
size.
Comprehensive
characterization
techniques
including
single
powder
X‐ray
diffraction,
as
well
electrospray
ionization
time‐of‐flight
mass
spectrometry
(ESI‐TOF‐MS)
confirm
that
ZrT‐1‐ethenyl
ZrT‐1‐alkyne
possess
an
isostructural
with
ZrT‐1
ZrT‐1‐Me,
respectively.
Adsorption
isotherms
breakthrough
experiments
combined
theoretical
calculations
demonstrate
effectively
remove
trace
in
achieve
CO
.
also
directly
purify
liquid
solutions.
This
work
a
benchmark
for
MOCs
one‐step
mixtures.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 26, 2025
Abstract
Research
over
the
years
has
revealed
immense
potential
of
metal–organic
frameworks
(MOFs)
for
purifying
olefins
such
as
ethylene
(C
2
H
4
)
and
propylene
3
6
).
However,
many
these
MOFs
face
challenges
in
terms
economic
viability,
particularly
production
scalability,
long‐term
stability,
process
capability.
In
this
study,
we
present
a
low‐cost
easily
scalable
synthesis
robust
MOF
material
(JNU‐74a),
featuring
balanced
surface
polarity
that
allows
one‐step
C
purification
from
methanol‐to‐olefin
(MTO)
products.
By
incorporating
highly
electronegative
atoms
on
nonpolar
surface,
JNU‐74a
exhibits
substantially
larger
absorption
capacity
stronger
binding
affinity
ethane
compared
to
,
evidenced
by
their
gas
adsorption
isotherms
heats
measurements.
In‐depth
analyses
through
situ
single‐crystal
X‐ray
diffraction
(SCXRD)
gas@JNU‐74a
unveil
multiple
supramolecular
bindings
favor
confirming
preferential
.
Breakthrough
experiments
demonstrate
can
efficiently
produce
polymer‐grade
(≥99.95%)
(≥99.5%)
/C
mixtures
different
ratios
single
adsorption‐desorption
cycle.
With
its
impressive
separation
capability,
high
chemical
cost‐effective
production,
holds
promise
olefin
MTO
products
other
challenging
industrial
separations.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(15)
Опубликована: Фев. 19, 2024
Abstract
Ethylene
(C
2
H
4
)
purification
and
propylene
3
6
recovery
are
highly
relevant
in
polymer
synthesis,
yet
developing
physisorbents
for
these
industrial
separation
faces
the
challenges
of
merging
easy
scalability,
economic
feasibility,
high
moisture
stability
with
great
efficiency.
Herein,
we
reported
a
robust
scalable
MOF
(MAC‐4)
simultaneous
C
.
Through
creating
nonpolar
pores
decorated
by
accessible
N/O
sites,
MAC‐4
displays
top‐tier
uptakes
selectivities
over
at
ambient
conditions.
Molecular
modelling
combined
infrared
spectroscopy
revealed
that
molecules
were
trapped
framework
stronger
contacts
relative
to
Breakthrough
experiments
demonstrated
exceptional
performance
binary
/C
as
well
ternary
mixtures,
simultaneously
affording
record
productivities
27.4
36.2
L
kg
−1
high‐purity
(≥99.9
%)
(≥99.5
%).
was
facilely
prepared
deckgram‐scale
under
reflux
condition
within
hours,
making
it
smart
address
challenging
gas
separations.
ACS Materials Letters,
Год журнала:
2024,
Номер
6(4), С. 1388 - 1395
Опубликована: Март 11, 2024
Separation
of
methanol-to-olefins
(MTO)
products
to
obtain
high-purity
C2H4
and
C3H6
is
great
importance,
since
it
provides
an
alternative
process
for
such
important
industrial
raw
materials.
However,
developing
adsorbents
with
high
C2H4/C3H6
selectivity
productivity
remains
challenging.
Herein,
we
report
ultrastable
layered
hydrogen-bonded
framework
(HOF-NBDA),
which
features
preferred
pore
multiple
interlaminar
interactions
C3H6.
It
delivers
ultrahigh
uptake
(3.6
mmol
g–1)
at
10
kPa,
while
absorbs
only
0.3
g–1
shows
a
(11.1).
Experimental
breakthroughs
show
that
HOF-NBDA
can
efficiently
separate
C3H6/C2H4
(50/50,
v/v)
different
flow
rates,
temperatures,
as
well
relative
humidities
(5.7
mol
kg–1,
purity
≥99.95%).
Meanwhile,
4.5
kg–1
(purity
≥99.5%)
also
be
collected
during
the
desorption
process.
Additionally,
thanks
stability,
good
scalability,
easy
regeneration,
considered
promising
material
one-step
energy-efficient
separation
MTO
products.
Angewandte Chemie,
Год журнала:
2024,
Номер
136(15)
Опубликована: Фев. 19, 2024
Abstract
Ethylene
(C
2
H
4
)
purification
and
propylene
3
6
recovery
are
highly
relevant
in
polymer
synthesis,
yet
developing
physisorbents
for
these
industrial
separation
faces
the
challenges
of
merging
easy
scalability,
economic
feasibility,
high
moisture
stability
with
great
efficiency.
Herein,
we
reported
a
robust
scalable
MOF
(MAC‐4)
simultaneous
C
.
Through
creating
nonpolar
pores
decorated
by
accessible
N/O
sites,
MAC‐4
displays
top‐tier
uptakes
selectivities
over
at
ambient
conditions.
Molecular
modelling
combined
infrared
spectroscopy
revealed
that
molecules
were
trapped
framework
stronger
contacts
relative
to
Breakthrough
experiments
demonstrated
exceptional
performance
binary
/C
as
well
ternary
mixtures,
simultaneously
affording
record
productivities
27.4
36.2
L
kg
−1
high‐purity
(≥99.9
%)
(≥99.5
%).
was
facilely
prepared
deckgram‐scale
under
reflux
condition
within
hours,
making
it
smart
address
challenging
gas
separations.
Advanced Materials,
Год журнала:
2023,
Номер
36(11)
Опубликована: Дек. 8, 2023
Abstract
Separating
propyne/propadiene
to
produce
pure
propadiene
is
extremely
challenging
in
industry
due
their
similar
properties.
Herein,
a
novel
ZrF
6
2−
anion
pillared
cage‐like
metal‐organic
framework
(termed
as
CuZrF
‐TPA)
for
highly
efficient
separation
reported.
It
exhibits
high
propyne
capacity
(177.4/188.6
cm
3
/cm
at
0.5/1.0
bar
and
298
K),
benchmark
selectivity
(6.0),
remarkable
potential
(5.7
mol
L
−1
)
simultaneously.
Record
productivity
(≈4.7
achieved
through
single
adsorption
process
breakthrough
experiments
with
excellent
recycle
stability
even
under
humid
conditions.
Based
on
the
structure
of
propyne‐loaded
crystals,
two
binding
sites
are
identified,
including
major
trapping
site
windows
minor
located
large
cages.
Modelling
studies
further
confirm
that
contracted
cage
surrounded
rotating
Lewis
basic
F
atoms
aromatic
rings
optimal
bonding
capture
multiple
hydrogen
π···π
interactions.
