SPE Journal,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 20
Published: March 1, 2025
Summary
Hydrogen
(H2)
production
and
storage
are
key
strategies
that
enable
the
transition
to
low-carbon
energy
on
a
global
scale.
Steam
methane
reforming
(SMR)
is
common
process
for
generating
H2,
but
SMR
produces
carbon
dioxide
(CO2)
as
byproduct,
which
needs
be
separated
from
gas
mixture
sequestered
reduce
footprint.
One
solution
simultaneously
purify
H2
component
permanently
sequester
CO2
by
injecting
mixtures
of
into
depleted
subsurface
coal
through
an
injection
well
producing
offset
well.
This
was
recently
simulated
verified
experimentally
using
coreflooding
approach.
In
current
work,
huff
’n’
puff
(HNP)
scheme
applied
evaluate
extent
purification/CO2
can
achieved.
The
rate-transient
analysis,
porosity,
permeability
(RTAPK)
method
also
used
estimate
after
each
HNP
cycle.
study,
synthetic
gases
were
injected
sample
Mannville
Formation
western
Canada,
allowed
soak,
produced
sample.
Two
cycles
injection/equilibration/production
[volume
percentages:
75%
H2/15%
CO2/10%
(CH4)]
performed
RTAPK
at
reservoir
temperature;
third
cycle
implemented
purified
Cycle
2.
For
cycle,
initial
pressure
between
870
psi
880
psi,
followed
soaking
period
30–150
hours.
After
stage
1,
composition
stabilized
~95%
H2/2%
CO2/3%
CH4,
demonstrating
simultaneous
increase
in
free-gas
concentration
decrease
CH4
concentrations.
A
similar
result
obtained
At
start
close
equilibrated
value,
end
this
period,
~86%
H2/6%
CO2/8%
indicating
concentrations
diluted
due
desorption
some
during
production.
again
2
with
somewhat
different
(suppressed
composition)
late-stage
~81%
H2/7%
CO2/12%
CH4.
late
production-stage
stream
then
reinjected
determine
if
could
further
(Cycle
3),
equilibrium
compositions
reinjection,
compositions,
suggest
purification
not
possible.
Cycles
1–3,
amount
recovered
approximately
20%,
38%,
46%,
respectively;
stored
96%,
92%,
79%,
respectively.
measured
before
injection,
estimated
~0.03
md.
However,
decreased
~0.01
proof-of-concept
study
demonstrates
achieved
H2/CO2/CH4-containing
samples
subsequent
mixture.
Energy & Fuels,
Journal Year:
2023,
Volume and Issue:
37(5), P. 3371 - 3412
Published: Feb. 16, 2023
Carbon
dioxide
(CO2)-enhanced
coalbed
methane
recovery
(CO2-ECBM)
is
a
critical
way
to
increase
production
and
reduce
greenhouse
gas
(CO2
CH4)
emissions.
As
captured
CO2
continuously
injected
in
the
coal
seams,
low
cost
of
sequestration
high
efficiency
CH4
can
be
achieved
via
flooding
replacing
effects
driven
by
flow.
Scientific
insights
into
complex
process
CO2-ECBM
experiments,
modelings,
technological
developments
need
made
propose
appropriate
countermeasures.
This
review
first
highlights
progress
under
laboratory
conditions,
e.g.,
binary
competitive
adsorption
displacement
experiments
macroscale
porous
structure
tests
using
technologies
nuclear
magnetic
resonance
(NMR),
scanning
electron
microscopy
(SEM),
computed
tomography
(CT)
microscale.
Then,
advances
mathematical
models
for
changing
permeability
porosity
during
are
reviewed,
accompanying
with
multi-field
multi-phase
coupling
responses
sorption,
diffusion,
gas–water
seepage,
heat
transfer,
solid
deformation.
Furthermore,
field
pilot
various
countries
regions
also
covered
reveal
key
technical
challenges
confronted
development
technology.
The
perspectives
models,
pilots
made,
which
include
but
not
limited
following:
conducting
core
CH4/CO2
test
situ
modeling
real
fractures/faults
failure,
developing
new
method
migration
leakage
monitoring
field,
enacting
relevant
standards,
laws,
regulations
promote
CO2-ECBM.
Earth-Science Reviews,
Journal Year:
2024,
Volume and Issue:
253, P. 104793 - 104793
Published: May 3, 2024
Carbon
capture
and
storage
(CCS)
in
subsurface
formations
has
emerged
as
a
promising
strategy
to
address
global
warming.
In
light
of
this,
this
review
aims
provide
comprehensive
understanding
the
mechanisms
involved
geological
trapping
CO2.
Additionally,
it
identify
techniques
used
evaluate
potential
for
CO2
sequestration
before
injecting
into
methods
monitor
progress
after
injection.
The
also
presents
future
research
directions
based
on
current
trends
field.
Four
principal
were
identified:
structural,
capillary
(residual),
solubility,
mineral
trapping.
These
vary
their
capacity
over
time
security
they
offer.
Structural
provides
most
significant
contribution
trapping,
whereas
offers
highest
security.
terms
monitoring
assessment,
three
main
approaches
identified,
including
seismic
borehole
geophysical
methods,
atmospheric
laboratory-scale
experiments.
One
novel
aspects
is
that
outlines
various
experimental
investigating
mechanisms,
an
area
prior
reviews
have
not
addressed.
At
laboratory
level,
tests
experiments
are
study
characteristics.
categorized
petrophysical
characterization,
pore-scale
experiments,
CO2-fluid-rock
interaction
adsorption
evaluation.
Another
development
qualitative
assessment
approach
applicability
throughout
stages
projects.
This
innovative
been
reported
previous
literature.
Our
was
prepared
following
scoping
methodology,
ensuring
inclusion
recent
relevant
studies.
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(10), P. 8355 - 8384
Published: May 1, 2024
The
escalating
levels
of
carbon
dioxide
emissions
(CO2)
and
the
detrimental
consequences
global
warming
have
spurred
extensive
research
into
identifying
secure
reliable
storage
sites
with
ample
capacity.
Depleted
gas
reservoirs
emerge
as
a
promising
option
for
CO2
sequestration,
solidifying
their
position
viable
sink.
These
conventional
or
unconventional
retain
substantial
pore
space
after
natural
extraction
depressurization.
Furthermore,
impermeable
top
layers
ensure
long-term
containment
hydrocarbons,
enhancing
safety
this
choice.
Consequently,
cost
process
can
be
reduced
through
incremental
recapture
excess
injection.
This
article
is
comprehensive
review
multiple
published
papers
exploring
enhancement
shale
recovery
It
aims
to
present
thorough
understanding
concept
technology,
highlighting
its
benefits
drawbacks,
comparing
existing
studies,
encouraging
further
CO2-EGR
principle.
ADVANCES IN GEO-ENERGY RESEARCH,
Journal Year:
2024,
Volume and Issue:
12(3), P. 205 - 222
Published: May 15, 2024
CO2/N2-enhanced
coalbed
methane
recovery
is
an
important
means
of
increasing
production,
and
understanding
the
competitive
adsorption
CO2,
CH4
N2
in
coalbeds
its
impact
on
coal
properties
important.
A
structural
model
for
anthracite
from
Daning-Jixian
was
constructed
based
elemental
analyses,
Fourier
transform
infrared
spectroscopy,
X-ray
photoelectron
spectroscopy
carbon
nuclear
magnetic
resonance
data.
The
grand
canonical
Monte
Carlo
method
used
to
research
multiple
gases
changes
porosity
permeability.
These
results
indicated
that
with
CO2
injection,
considerable
desorption
occurred
seams,
permeability
decreased.
During
increased,
increased
gradually.
However,
rate
after
injection
much
lower
than
CO2.
With
as
molar
mass
ratio
quantity
adsorbed
decreased,
total
amount
gas
which
coal.
At
0.6,
70.95%,
were
high,
sequestered
mitigate
greenhouse
emissions
provide
economic
environmental
benefits.
Document
Type:
Original
article
Cited
as:
Pan,
J.,
Jiao,
F.,
Wang,
K.,
Li,
Y.,
Song,
D.,
Hou,
Q.
Molecular
simulations
effects
adsorption,
Advances
Geo-Energy
Research,
2024,
12(3):
205-222.
https://doi.org/10.46690/ager.2024.06.05
