International Petroleum Technology Conference,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 17, 2025
Abstract
The
role
of
hydrogen
geo-storage
and
production
in
addressing
global
warming
energy
demand
concurrently
cannot
be
understated.
Diverse
factors
such
as
interfacial
tension
(IFT)
wettability
influence
safe
effective
production.
IFT
controls
the
maximum
H2
storage
column
height,
capacity,
capillary
entry
pressure.
Current
laboratory
experimental
techniques
for
determination
H2/cushion
gas
systems
are
resource-intensive.
Nonetheless,
extensive
data
supports
machine
learning
(ML)
deployment
to
determine
time-efficiently
cost-effectively.
Hence,
this
work
evaluated
predictive
capabilities
supervised
ML
paradigms
including
random
forest,
extra
trees
regression,
gradient
boosting
regression
(GBR),
light
machine,
wherein
novelty
study
lies.
An
comprehensive
dataset
comprising
2564
instances
was
gathered
from
literature,
encompassing
independent
variables:
pressure
0.10–45
MPa),
temperature
(20–176
°C),
brine
salinity
(0–20
mol/kg),
hydrogen,
methane,
carbon
dioxide,
nitrogen
mole
fractions
(0-100
mol.%).
pre-processed
split
into
70%
model
training
30%
testing.
Statistical
metrics
visual
representations
were
utilized
quantitative
qualitative
assessments
models.
Leverage
approach
subsequently
applied
classify
different
categories
verify
statistical
validity
database
reliability
constructed
paradigms.
impact
variables
on
prediction
using
Spearman
correlation,
permutation
importance,
Shapley
Additive
Explanations
(SHAP).
Nitrogen
CO2
demonstrated
least
greatest
gas/brine
based
correlation
analysis,
SHAP.
Generally,
developed
successfully
captured
underlying
relationships
between
IFT,
recording
an
overall
R2
>
0.97,
MAE
<
1.30
mN/m,
RMSE
2
AARD
2.3%
GBR
superior
performance,
yielding
highest
lowest
MAE,
RMSE,
0.987,
0.507
0.901
0.906%,
respectively.
also
provided
more
accurate
results
pure
H2/water
than
empirical
molecular
dynamics-based
correlations
by
other
scholars.
Only
0.43–2.11%
outside
range,
underscoring
beneficial
tools
toolbox
domain
experts,
which
could
fast-track
workflows
minimize
uncertainties
surrounding
conventional
aqueous
systems.
This
progress
is
promising
mitigating
loss
optimizing
strategies
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(14), С. 5555 - 5563
Опубликована: Март 26, 2024
Subsurface
formations
are
promising
for
large-scale
H2
storage,
balancing
the
energy
demand
and
supply.
Wettability
is
vital
in
ensuring
storage
safety,
efficiency,
capacity,
whereas
noticeable
discrepancies
exist
literature.
This
work
reconciles
these
by
revealing
mechanisms
of
quartz
wettability
alteration
with
surface
chemistry
pressure
using
classical
molecular
dynamics
simulation.
We
find
that
fully
rigid
substrate
results
much
lower
hydrophilicity
than
flexible
hydroxyl
group
substrates
due
to
probability
hydrogen
bond
formation
between
water
groups.
Also,
relies
on
not
only
area
density
but
also
arrangement
Monolayer
adsorption
both
hydrophilic
hydrophobic
surfaces
observed,
structure
adsorbed
film
different.
Dissolved
prefers
move
rather
staying
bulk
water.
The
contact
angle
hydroxylated
fluctuates
30.7
37.1°
ranging
from
1–30
MPa,
without
a
monotonic
trend.
reveal
dominant
mechanism
within
this
range
pinning
effect
induced
microstructures
surface.
Fuel,
Год журнала:
2024,
Номер
370, С. 131842 - 131842
Опубликована: Май 9, 2024
Underground
hydrogen
storage
(UHS)
has
been
recognized
as
a
key
enabler
of
the
industrial-scale
implementation
hydrogen-based
economy.
However,
efficiency
and
capacity
(H2)
in
carbonate
aquifers
can
be
influenced
by
presence
organic
acids.
Nevertheless,
existing
literature
contains
few
investigations
H2/calcite/brine
wettability
influence
acids
on
H2
storability
reservoirs.
Therefore,
present
study
examines
stearic
acid
dynamic
H2/brine
calcite
substrates
(as
proxy
formation)
under
various
geological
conditions
(0.1–20
MPa
at
323
K),
equilibrated
10
wt%
NaCl
brine.
In
addition,
application
alumina
nanofluid
concentrations
(0.05,
0.1,
0.25,
0.75
wt%)
is
evaluated
same
experimental
for
enhancing
organic-aged
wettability.
The
results
demonstrate
significant
impact
(advancing
receding)
contact
angles
substrates,
thereby
resulting
shift
from
intermediate
water-wet
to
H2-wet
conditions,
representing
an
unfavorable
state
storage.
Conversely,
substrate
enhances
H2/brine/calcite
towards
state,
which
more
favorable
residual
trapping
formations.
optimal
concentration
modification
organically
aged
samples
found
0.25
wt%.
These
findings
highlight
contamination
potential
geo-storage
International Journal of Hydrogen Energy,
Год журнала:
2023,
Номер
50, С. 1607 - 1615
Опубликована: Окт. 31, 2023
Carbon
Dioxide
(CO2)
emissions
from
fossil
fuel
consumption
have
caused
global
warming
and
remain
challenging
problems
for
mitigation.
Underground
Hydrogen
Storage
(UHS)
provides
clean
replaces
traditional
fuels
to
reduce
of
CO2.
Geological
formations
such
as
depleted
oil/gas
reservoirs,
deep
saline
aquifers
shale
been
recognized
potential
targets
inject
store
H2
into
the
subsurface
large-scale
implementation
CCS
UHS.
However,
presence
with
cushion
gas
at
different
fractions
under
geo-storage
conditions,
which
can
influence
Hydrogen's
flow
properties,
was
not
investigated
widely.
Until
now,
studies
interfacial
properties
between
water
a
mixture
(CO2,
N2
or
CH4)
in
are
very
limited
unavailable
data
experiments
simulations.
In
this
study,
many
predictions
by
using
molecular
dynamics
simulation
were
conducted
predict
tension
(γ)
systems
H2/CO2/H2O,
H2/N2/H2O
H2/CH4/H2O
pressures,
temperatures,
gases
A
comparison
predicted
γ
results
previous
research
also
made.
The
findings
study
indicated
that
H2/CH4/H2O,
H2/N2/H2O,
function
pressure,
temperature,
fraction
H2,
decreased
increasing
pressures
temperatures
increased
H2%
mixture.
Additionally,
an
extending
new
CO2/H2/H2O,
N2/H2/H2O
CH4/H2/H2O
reported
support
evaluating
stability
storage
capacity
combined
geological
formations.
Furthermore,
it
contribute
de-risking
proceeding
safely
efficiently
Storage.
Langmuir,
Год журнала:
2024,
Номер
40(10), С. 5369 - 5377
Опубликована: Фев. 28, 2024
Large-scale
underground
hydrogen
storage
(UHS)
plays
a
vital
role
in
energy
transition.
H2-brine
interfacial
tension
(IFT)
is
crucial
parameter
structural
trapping
geological
locations
and
gas–water
two-phase
flow
subsurface
porous
media.
On
the
other
hand,
cushion
gas,
such
as
CO2,
often
co-injected
with
H2
to
retain
reservoir
pressure.
Therefore,
it
imperative
accurately
predict
(H2
+
CO2)-water/brine
IFT
under
UHS
conditions.
While
there
have
been
number
of
experimental
measurements
on
H2-water/brine
IFT,
an
accurate
efficient
model
conditions
still
lacking.
In
this
work,
we
use
molecular
dynamics
(MD)
simulations
generate
extensive
databank
(840
data
points)
over
wide
range
temperature
(from
298
373
K),
pressure
50
400
bar),
gas
composition,
brine
salinity
(up
3.15
mol/kg)
for
typical
conditions,
which
used
develop
machine
learning
(ML)-based
equation.
Our
ML-based
equation
validated
by
comparing
available
equations
various
systems
(H2-brine/water,
CO2-brine/water,
CO2)-brine/water),
rendering
generally
good
performance
(with
R2
=
0.902
against
601
points).
The
developed
can
be
readily
applied
implemented
applications.
Encyclopedia,
Год журнала:
2024,
Номер
4(2), С. 847 - 863
Опубликована: Май 14, 2024
Due
to
the
increasing
world
population
and
environmental
considerations,
there
has
been
a
tremendous
interest
in
alternative
energy
sources.
Hydrogen
plays
major
role
as
an
carrier
due
its
environmentally
benign
nature.
The
combustion
of
hydrogen
releases
water
vapor
while
it
also
vast
industrial
application
aerospace,
pharmaceutical,
metallurgical
industries.
Although
promising,
faces
storage
challenges.
Underground
(UHS)
presents
promising
method
safely
storing
hydrogen.
selection
appropriate
cushion
gas
for
UHS
is
critical
aspect
ensuring
safety,
efficiency,
reliability
system.
Cushion
pivotal
maintaining
necessary
pressure
within
reservoir,
thereby
enabling
consistent
injection
withdrawal
rates
One
key
functions
act
buffer,
that
remains
desired
range
despite
fluctuations
demand
or
supply.
This
achieved
by
alternately
expanding
compressing
during
cycles,
effectively
regulating
overall
dynamics
facility.
Furthermore,
choice
can
have
significant
implications
on
performance
long-term
stability
Factors
such
compatibility
with
hydrogen,
cost-effectiveness,
availability,
impact
must
be
carefully
considered
when
selecting
most
suitable
gas.
present
study
provides
comprehensive
review
different
types
gases
commonly
used
UHS,
including
nitrogen,
methane,
carbon
dioxide.
By
examining
advantages,
limitations,
practical
considerations
associated
each
option,
aims
offer
valuable
insights
into
optimizing
systems.
Ultimately,
successful
implementation
hinges
not
only
technological
innovation
but
strategic
decisions
regarding
management.
addressing
these
challenges
proactively,
stakeholders
unlock
full
potential
clean
sustainable
carrier,
contributing
global
transition
towards
low-carbon
future.
