Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(11), P. 9734 - 9741
Published: May 15, 2024
Natural
gas
hydrate
is
widely
recognized
as
a
promising
energy
source,
with
depressurization
emerging
the
preferred
method
due
to
its
simplicity
and
cost-effectiveness.
Employing
an
appropriate
strategy
paramount
for
maximizing
production
efficiency,
especially
when
faced
constraints
in
reservoir
heat
supply.
However,
precise
influence
of
rate
on
supply
remains
unclear.
In
this
study,
we
employ
fully
coupled
thermo-hydro-chemical
(THC)
model
simulate
60
days
dissociation
using
horizontal
well
under
various
schemes:
decelerating
(DD),
regular
(RD),
accelerated
(AD).
We
investigate
effects
dynamic
changes
production,
multiphysics
response
Our
findings
indicate
that
most
pronounced
during
initial
stage.
A
positive
correlation
between
observed.
The
amplitude
fluctuations
more
significant
at
higher
rates,
these
intensify
increases.
From
perspective,
sensible
ratio
increases
rate.
Gas
primarily
driven
by
flow
dynamics
propelled
early
stages
constant
pressure.
Subsequently,
it
controlled
ambient
transfer.
Therefore,
additional
replenishment
can
enhance
improve
economic
viability
not
predominant.
Such
hold
crucial
reference
value
commercial
exploitation
resources.
ACS Omega,
Journal Year:
2024,
Volume and Issue:
9(28), P. 30234 - 30243
Published: July 5, 2024
The
synergistic
effect
of
thermodynamic
promoter
tetrafluoroethane
(R134a)
and
kinetic
sodium
dodecyl
sulfate
(SDS)
can
significantly
improve
the
phase
equilibrium
conditions
required
for
CO2
hydrate
formation
promote
rapid
generation
hydrate.
Based
on
this,
this
study
investigates
influence
SDS
R134a
synergy
separation
CO2/H2
mixed
gas
using
method.
research
reveals
that
without
addition,
forms
first
at
gas–liquid
interface
before
induction,
hindering
exchange.
addition
inhibit
film,
enhance
initiator
in
process,
accelerate
nucleation
hydrate,
thus
synergistically
strengthen
gases.
Hydrate
be
achieved
a
concentration
100
ppm
solution,
growth
becomes
more
significant
with
increasing
concentration.
Optimal
efficiency
maximum
H2
are
500
SDS,
42.29
54.88%
concentration,
respectively.
Decreasing
initial
charge
temperature
has
little
impact
but
reduces
induction
time,
reducing
it
to
3
min
12
°C.
This
improved
gas,
providing
better
reference
hydrogen
purification
by
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(19), P. 18457 - 18468
Published: Sept. 2, 2024
Hydrate
agglomeration
and
blockage
have
emerged
as
significant
challenges
in
deep-water
oil
gas
exploitation.
Currently,
there
are
limited
studies
on
the
velocity
distribution
of
hydrate
particles
inside
pipe
they
move
during
flow
process.
This
study
utilizes
computational
fluid
dynamics
(CFD)–discrete
element
method
(DEM)
methods
to
simulate
process
slurry
a
horizontal
pipe.
The
results
indicate
that
at
low
rates,
pressure
drop
is
predominantly
influenced
by
formation
sedimentary
moving
beds.
On
other
hand,
high
augmentation
arises
from
dissipation
energy
caused
frictional
losses
occurring
between
inner
surface
pipeline.
A
detailed
analysis
presented
fluctuations
affecting
motion
particles.
illustrates
particle
lower
region
near
wall
enriched
with
particles,
while
uniformly
distributed
area
center
higher.
obtained
this
provide
comprehensive
theoretical
framework
for
further
exploration
into
evolutionary
patterns
plugging.
