International Journal of Hydrogen Energy,
Journal Year:
2022,
Volume and Issue:
47(30), P. 14104 - 14120
Published: March 11, 2022
Underground
hydrogen
(H2)
storage
(UHS)
and
carbon
dioxide
(CO2)
geo-storage
(CGS)
are
prominent
methods
of
meeting
global
energy
needs
enabling
a
low-carbon
economy.
The
pore-scale
distribution,
reservoir-scale
capacity,
containment
security
H2
CO2
significantly
influenced
by
interfacial
properties,
including
the
equilibrium
contact
angle
(θE)
solid-liquid
solid-gas
tensions
(γSL
γSG).
However,
due
to
technical
constraints
experimentally
determining
these
parameters,
they
often
calculated
based
on
advancing
receding
values.
There
is
scarcity
θE,
γSL,
γSG
data,
particularly
related
structural
sealing
potential
caprock,
which
unavailable
in
literature.
Young's
equation
Neumann's
state
were
combined
this
study
theoretically
compute
three
parameters
(θE,
γSG)
at
reservoir
conditions
for
potential.
Pure
mica,
organic-aged
alumina
nano-aged
mica
substrates
investigated
explore
rock
wetting
phenomena
caprock.
results
reveal
that
θE
increases
while
decreases
with
increasing
pressure,
organic
acid
concentration,
alkyl
chain
length.
temperatures
gas,
vice
versa
CO2.
In
addition,
γSL
decrease,
whereas
nanofluid
concentration
from
0.05
0.25
wt%.
Conversely,
increase,
0.75
wettability
(a
proxy
caprock)
was
generally
less
than
similar
physio-thermal
conditions.
data
reported
crucial
predicting
caprock
alterations
resulting
capacity
UHS
CGS.
International Journal of Hydrogen Energy,
Journal Year:
2021,
Volume and Issue:
46(65), P. 32809 - 32845
Published: Aug. 16, 2021
Today,
bi
-
reforming
of
methane
is
considered
as
an
emerging
replacement
for
the
generation
high-grade
synthesis
gas
(H2:CO
=
2.0),
and
also
encouraging
renewable
energy
substitute
fossil
fuel
resources.
For
achieving
high
conversion
levels
CH4,
H2O,
CO2
in
this
process,
appropriate
operation
variables
such
pressure,
temperature
molar
feed
constitution
are
prerequisites
yield
gas.
One
biggest
stumbling
blocks
reaction
sudden
deactivation
catalysts,
which
attributed
to
sintering
coke
formation
on
active
sites.
Consequently,
it
worthwhile
choose
promising
catalysts
that
demonstrate
excellent
stability,
activity
selectivity
during
production
syngas.
This
review
describes
characterisation
various
used
bi-reforming
Ni-based
with
MgO,
MgO–Al2O3,
ZrO2,
CeO2,
SiO2
catalytic
supports.
In
summary,
addition
a
Ni/SBA-15
catalyst
showed
greater
reactivity
than
nickel
celites;
however,
both
samples
deactivated
strongly
stream.
Ce-promoted
were
more
found
favourable
Ni/MgAl2O4
alone
due
their
inherent
capability
removing
amorphous
from
surface.
Also,
Lanthanum
promoted
exhibited
dispersion
enhanced
interaction
between
metal
support.
Furthermore,
La2O3
was
improve
selectivity,
activity,
coking
resistance
Ni
implanted
within
SiO2.
Non-noble
metal-based
carbide
be
stable
reactions.
Interestingly,
five-fold
increase
Al2O3
support
observed
incorporation
Cr,
Ba
continuous
time
140
h.
Bi-reforming
200
h
Ni-γAl2O3
98.3%
CH4
around
82.4%.
Addition
MgO
formed
MgAl2O4
spinel
phase
at
temperatures
quite
effective
preventing
enhancement
basicity
surface
catalyst.
Additionally,
distribution
perovskite
oxides
over
20
wt
%
silicon
carbide-modified
aluminium
oxide
supports
activity.
NdCOO3
candidates
longer
operations.
Journal of Colloid and Interface Science,
Journal Year:
2021,
Volume and Issue:
608, P. 1739 - 1749
Published: Oct. 19, 2021
Actualization
of
the
hydrogen
(H2)
economy
and
decarbonization
goals
can
be
achieved
with
feasible
large-scale
H2
geo-storage.
Geological
formations
are
heterogeneous,
their
wetting
characteristics
play
a
crucial
role
in
presence
H2,
which
controls
pore-scale
distribution
fluids
sealing
capacities
caprocks.
Organic
acids
readily
available
geo-storage
minute
quantities,
but
they
highly
tend
to
increase
hydrophobicity
storage
formations.
However,
there
is
paucity
data
on
effects
organic
acid
concentrations
types
H2-wettability
caprock-representative
minerals
attendant
structural
trapping
capacities.Geological
contain
concentrations,
alkyl
chain
length
ranging
from
C4
C26.
To
fully
understand
natural
geological
picture,
we
aged
mica
mineral
surfaces
as
representative
caprock
varying
molecules
(with
numbers
carbon
atoms,
lignoceric
C24,
lauric
C12,
hexanoic
C6)
for
7
days.
comprehend
wettability
mica/H2/brine
system,
employed
contact-angle
procedure
similar
that
environments
(25,
15,
0.1
MPa
323
K).At
highest
investigated
pressure
(25
MPa)
concentration
(10-2
mol/L),
surface
became
completely
wet
advancing
(θa=
106.2°)
receding
(θr=97.3°)
contact
angles.
The
order
increasing
θa
θr
contaminations
follows:
>
acid.
results
suggest
gas
leakage
through
possible
at
higher
physio-thermal
conditions.
influence
contamination
inherent
realistic
conditions
should
considered
avoid
overprediction
containment
security.
Journal of Colloid and Interface Science,
Journal Year:
2021,
Volume and Issue:
608, P. 1457 - 1462
Published: Oct. 13, 2021
Hydrogen
geo-storage
is
considered
as
an
option
for
large
scale
hydrogen
storage
in
a
full-scale
economy.
Among
different
types
of
subsurface
formations,
coal
seams
look
to
be
one
the
best
suitable
options
coal's
micro/nano
pore
structure
can
adsorb
huge
amount
gas
(e.g.
hydrogen)
which
withdrawn
again
once
needed.
However,
literature
lacks
fundamental
data
regarding
H2
diffusion
coal.In
this
study,
we
measured
adsorption
rate
Australian
anthracite
sample
at
isothermal
conditions
four
temperatures
(20
°C,
30
45
°C
and
60
°C),
equilibrium
pressure
∼
13
bar,
calculated
coefficient
(
[Formula:
see
text]
)
each
temperature.
CO2
rates
were
same
similar
comparison.Results
show
that
rate,
consequently
,
increases
by
values
are
order
magnitude
larger
than
equivalent
whole
studied
temperature
range
20-60
°C.
/
also
shows
increasing
trend
versus
capacity
about
5
times
higher
all
temperatures.
Both
capacities,
pressure,
slightly
decrease
rises.
Advances in Water Resources,
Journal Year:
2022,
Volume and Issue:
163, P. 104165 - 104165
Published: March 12, 2022
Characterizing
the
wettability
of
hydrogen
(H2)–methane
(CH4)
mixtures
in
subsurface
reservoirs
is
first
step
towards
understanding
containment
and
transport
properties
for
underground
storage
(UHS).
In
this
study,
we
investigate
static
contact
angles
H2–CH4
mixtures,
with
brine
Bentheimer
sandstone
rock
using
a
captive-bubble
cell
device
at
different
pressures,
temperatures
salinity
values.
It
found
that,
under
studied
conditions,
H2
CH4
show
comparable
behaviour
ranging
between
[25°–45°];
consequently
their
behave
similar
to
pure
gas
systems,
independent
composition,
pressure,
temperature
salinity.
For
system
rest,
acting
buoyancy
surface
forces
allow
theoretical
sensitivity
analysis
approach
characterize
wettability.
Moreover,
it
theoretically
validated
that
Bond
numbers
bubble
sizes,
bubbles
are
indeed
comparable.
Consequently,
large-scale
systems
where
capillary
main
forces,
H2,
will
have
characteristics.
