Processes,
Journal Year:
2024,
Volume and Issue:
12(11), P. 2353 - 2353
Published: Oct. 26, 2024
Hydrogen
doping
using
existing
natural
gas
pipelines
is
a
promising
solution
for
hydrogen
transportation.
A
large
number
of
non-metallic
seals
are
currently
used
in
long-distance
pipelines.
Compared
with
metallic
seals,
have
the
advantages
corrosion
resistance,
light
weight,
and
easy
processing,
which
can
improve
safety
economy
In
order
to
ensure
long-term
safe
use
hydrogen-doped
pipelines,
this
paper
selects
commonly
carries
out
sealing
test,
aging
anti-explosion
test
on
under
conditions
different
ratios.
At
same
time,
combined
actual
working
pipeline,
external
environment,
other
factors,
applicability
evaluation
index
system
was
established,
model
based
physical
chemical
properties,
fuzzy
comprehensive
evaluation,
structural
entropy
weight
method
developed
applied
field.
The
results
show
that
result
nitrile
rubber
soft
1.7845,
graphite-polytetrafluoroethylene
material
hard
1.5988,
both
them
at
good
level.
This
provides
technical
support
judging
strategies
selection
materials
Langmuir,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 2, 2025
Accurately
assessing
the
adsorption
and
diffusion
behaviors
of
H2,
CH4,
their
mixtures
are
essential
for
estimating
underground
hydrogen
storage
(UHS).
This
understanding
is
critical
safe
efficient
H2
in
depleted
shale
gas
reservoirs.
Although
kerogen
has
been
extensively
studied,
adsorption-induced
swelling
remains
unexplored
UHS.
In
this
study,
we
investigate
mechanisms
using
Lagrangian
Eulerian
approaches
analyze
through
molecular
simulations.
Our
results
reveal
that
presence
cushion
gases
like
which
exhibit
stronger
than
neglecting
deformation
can
lead
to
an
underestimation
capacity
by
approximately
40%.
Furthermore,
increasing
pressure
makes
behavior
deviate
from
consistent
trend
observed
with
either
or
contracting
depending
on
pore
size.
Simulations
also
predict
self-diffusion
coefficient
porous
1
order
magnitude
higher
CH4.
These
findings
highlight
importance
incorporating
flexibility
into
modeling
UHS
involving
multiple
species
improve
accuracy
safety
operations
