Abstract
Underground
storage
of
carbon
dioxide
(CO2)
and
hydrogen
(H2)
in
geological
formations
has
been
considered
an
effective
method
for
the
energy
transition
towards
a
low-carbon
industry.
The
wettability
rock
is
significant
parameter
underground
gas
storage,
determining
both
capacity
containment
safety.
This
study
focuses
on
using
two
chemicals,
methyl
orange
(MO)
methylene
blue
(MB),
as
wetting
agents
at
different
concentrations
(10
to
100
mg/L)
change
improve
CO2
H2.
To
achieve
this,
contact
angle
measurement
technique
was
utilised
measure
advancing
(θa)
receding
(θr)
angles
under
reservoir
conditions,
with
constant
pressure
13
MPa
system
20
system,
temperatures
25°C
50°C,
brine
salinity
0.3
M
NaCl.
mimic
surfaces
calcite
quartz
samples
were
treated
stearic
acid
before
being
exposed
agent
chemicals.
Although
these
are
hydrophobic,
modifying
their
even
very
trace
concentration
MO
or
MB
significantly
alters
from
hydrophobic
hydrophilic.
demonstrates
that
presence
organic
acids
can
affect
H2
rock.
However,
injecting
diluted
amount
into
sandstone
carbonate
increase
capacity.
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
Fuel,
Год журнала:
2024,
Номер
371, С. 132045 - 132045
Опубликована: Май 31, 2024
The
large-scale
subsurface
storage
of
hydrogen
is
a
crucial
element
the
economy
value
chain
and
an
essential
process
for
achieving
successful
replacement
carbon-based
fuels.
wettability
rock-H2-brine
system,
as
quantified
by
contact
angle
measurement,
has
been
focus
most
recent
research
due
to
its
impacts
on
fluid
flow,
H2
migration
recovery
efficiency
during
underground
(UHS).
However,
reported
data
sets
are
quite
inconsistent,
there
relatively
few
literature
reports
regarding
angles
H2/brine
Saudi
Arabian
basalt
(SAB)
compared
quartz,
shale,
mica,
calcite.
Hence,
advancing
receding
θaandθr
SAB-H2-brine
system
measured
herein
via
sessile
drop
method
at
various
temperatures
(308
323
K)
pressures
(0.1–20
MPa)
ascertain
appropriateness
SAB
UHS.
results
indicate
that
generally
increases
with
pressure
temperature,
but
pure
remains
strongly
water
wet,
having
θa
θr<45°
under
all
experimental
conditions.
Conversely,
stearic
acid
contamination
(10−2
mol/L)
found
be
inimical
UHS,
increasing
from
42.1°
100.8°
aged
SAB,
while
θr
36.3°
94.2°,
20
MPa
K.
At
same
temperature
K,
column
heights
decrease
pressure,
reaching
4663
m
−424
organic
respectively,
MPa,
thereby
confirming
increased
depth
unfavorable
UHS
in
SAB.
These
provide
insights
into
conditions
favorable
formations.
Journal of Energy Storage,
Год журнала:
2024,
Номер
97, С. 112768 - 112768
Опубликована: Июль 1, 2024
The
modification
of
hydrophobic
rock
surfaces
to
the
water-wet
state
via
nanofluid
treatment
has
shown
promise
in
enhancing
their
geological
storage
capabilities
and
efficiency
carbon
dioxide
(CO2)
hydrogen
(H2)
containment.
Despite
this,
specific
influence
silica
(SiO2)
nanoparticles
on
interactions
between
H2,
brine,
within
basaltic
formations
remains
underexplored.
present
study
focuses
effect
SiO2
wettability
Saudi
Arabian
basalt
(SAB)
under
downhole
conditions
(323
K
pressures
ranging
from
1
20
MPa)
by
using
tilted
plate
technique
measure
contact
angles
H2/brine
surfaces.
findings
reveal
that
SAB's
hydrophobicity
intensifies
presence
organic
acids,
with
significant
increases
both
advancing
(θa)
receding
(θr)
upon
exposure
acid
at
323
MPa.
Contrastingly,
application
these
results
a
marked
shift
towards
hydrophilicity,
θa
θr
decreasing
substantially,
thus
indicating
an
optimal
nanoparticle
concentration
(0.1
wt%
SiO2)
for
effecting
transition
H2-wet
states.
This
change
aligns
known
pressure-dependent
behavior
angles.
Moreover,
organically-aged
0.1
nanofluids
MPa
enhances
H2
column
height
significantly,
−424
m
4340
m,
suggesting
reduced
risk
migration
across
caprock
thereby
structural/residual
trapping
containment
security
Arabia.
article
highlights
crucial
role
improving
efficacy
basalt,
offering
new
insight
optimization
solutions
hydrogen,
critical
component
sustainable
energy
future.
Energy & Fuels,
Год журнала:
2023,
Номер
37(19), С. 15138 - 15152
Опубликована: Сен. 22, 2023
Hydrogen
geo-storage
is
a
promising
technology
to
achieve
net-zero
carbon
emissions.
Basaltic
rocks
have
attracted
limited
attention,
and
only
knowledge
of
the
suitability
basaltic
formations
for
large-scale
hydrogen
storage
available.
The
complex
in
situ
geochemical
reaction
basalt–hydrogen
key
factor
evaluating
basalt
storage.
This
paper
investigates
interactions
hydrogen–basalt–water
evaluates
impact
on
basalt's
physical
properties.
Basalt
samples
collected
from
CarbFix
site
Iceland
are
treated
with
hydrogen–water
108
days
under
9.65
MPa
at
348
K,
various
analytical
methods
employed.
results
show
minor
dissolution
plagioclase
minerals
after
treatment
due
redox
reactions
hydrogen.
However,
this
behavior
might
contribute
precipitation
calcium
surface.
Images
obtained
scanning
electron
microscopy
reveal
that
filling
cracks
was
removed
no
obvious
crack
growth,
which
resulted
increase
pores
(4%).
Contact
angle
measurements
surface
wettability
remains
water-wet
treatment.
A
blank
nitrogen–DI
water
test
performed,
potential
between
basalt,
indicating
changes
exist.
We
conclude
reactivity
injection
low;
thus,
promising.
work
can
be
suitable
experimental
framework
assist
assessing
UHS.
