Progress of Oxygen Generation Technologies in High‐Altitude and Emergency Rescue Conditions
Asia-Pacific Journal of Chemical Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 26, 2025
ABSTRACT
Oxygen
plays
a
crucial
role
in
the
prevention
and
treatment
of
acute
altitude
sickness,
as
well
emergency
rescue.
To
provide
timely
adequate
oxygen
to
patients,
on‐site
generation
is
an
effective
solution.
Currently,
there
are
various
methods
with
distinct
characteristics
suitable
for
different
scenarios.
Understanding
principles,
features,
recent
advancements
these
essential
enhancing
efficiency
production.
This
article
reviews
several
primary
techniques,
including
cryogenic
distillation,
pressure
swing
adsorption,
membrane
separation,
chlorate
decomposition,
decomposition
superoxide,
water
electrolysis.
Each
method
discussed
terms
its
underlying
characteristics,
latest
research
developments,
emphasis
on
their
applications
prevention,
treatment,
response
sickness.
review
aims
guide
development
technologies
tailored
diverse
environments.
Язык: Английский
Insights into the Adsorptive Separation of Ethylene/Ethane in LTA-Type Zeolites
Separations,
Год журнала:
2025,
Номер
12(6), С. 146 - 146
Опубликована: Июнь 1, 2025
Understanding
the
competitive
adsorption
mechanism
is
essential
for
development
of
adsorptive
separation
ethylene
(C2H4)
and
ethane
(C2H6).
In
this
work,
density
functional
theory
calculations
molecular
dynamics
simulations
were
employed
to
investigate
C2H4
C2H6
in
two
LTA-type
zeolites,
ITQ-29
5A.
The
results
show
that
energies
gas
molecules
zeolite
5A
are
more
negative
than
ITQ-29,
difference
energy
between
significantly
larger
13.3
versus
6.2
kJ/mol.
Zeolite
demonstrates
high
C2H4/C2H6
ideal
selectivity
(43.5
at
5
ns)
while
exhibiting
slow
uptake
efficiency
due
small
pore
windows,
hindering
diffusion
(1.05
×
10−10
m2/s
298
K).
contrast,
facilitates
faster
(3.25
10−9
K)
exhibits
a
modest
1.11
ns
single-gas
2.72
equimolar
binary
mixture
adsorption.
To
enhance
selectivity,
methyl
phosphonic
acid
introduced
onto
add
sieving
layer
enables
preferentially
permeate,
optimal
coverage
50%,
yielding
17.5
preserving
efficiency.
insights
into
coating
inside
zeolites
provide
theoretical
basis
rational
design
high-performance
adsorbents.
Язык: Английский