International Journal of Chemical Reactor Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 11, 2024
Abstract
In
the
context
of
thermochemical
energy
storage
(TCES)
for
concentrating
solar
power
(CSP)
applications,
metal
carbonates’
reversible
calcination
and
carbonation
are
gaining
prominence,
particularly
in
SrCO
3
/SrO
system.
This
system
is
notable
its
high
theoretical
density
10.61
GJ/m³
operational
temperatures
up
to
1,200
°C.
However,
like
CaCO
/CaO
system,
SrO
experiences
a
significant
drop
reactivity
during
cycling
due
sintering
agglomeration
particles.
this
work
proposed
that
conversion
effective
will
be
improved
by
mixing
strontium
carbonate
with
calcium
carbonate.
The
best
mix
found
was
80/20
/CaCO
operating
parameters
calcination-carbonation
°C
900
°C,
respectively.
reaction
has
notably
better
stable
rate
than
pure
study
carried
out
using
thermogravimetry
analysis.
mixture
subjected
9
cycles,
ninth
cycle,
there
an
33.14
%,
which,
compared
,
2.33
%;
noticeably
process.
There
increase
percentage
30.81
%.
Volumetric
reduced
from
6.93
2.81
GJ/m
first
after
nine
cycles.
XRD
analysis
unprocessed
4
cycles
showed
no
formation
new
or
secondary
compounds,
only
expected
compounds:
SrO,
CaO,
.
important
change
explained
looping
because
CaO
remains
encapsulated
does
not
react
completely
at
As
hypothesis,
encapsulation
delays
Using
T
carb
=
850
promotes
CaO.
By
promoting
react,
released
rapidly,
material
faster
Comparing
seventh
cycle
it
observed
decreases
0.4431
0.4202
and,
same
proportion,
volumetric
density.
Energy Conversion and Management,
Journal Year:
2024,
Volume and Issue:
302, P. 118080 - 118080
Published: Jan. 21, 2024
This
study
presents
a
thermodynamic
analysis
of
novel
concept
that
synergistically
integrates
solid
oxide
fuel
cell
with
Ceria-based
solar-chemical
looping
methane
reforming
system.
The
integrated
configuration
aims
to
simultaneously
achieve
solar
energy
storage,
electric
power
production,
carbon
capture
and
in
situ
re-utilization.
proposed
hybrid
system
capitalises
on
the
advantageous
features
unit,
specifically
oxygen
carrier
reduction
during
step
for
waste
gas
dissociation
oxidation
release.
additional
syngas
produced
is
introduced
cell,
enabling
further
production
stream
schematic
process
modelled
by
solving
mass
balances
at
steady-state
conditions.
chemical
parameters
(fuel
ratio,
co-splitting
ratio),
material
(Ceria
effectiveness),
(temperature,
utilisation,
operating
voltage,
steam-to-carbon
ratio)
are
also
examined.
plant
exhibits
promising
characteristics,
achieving
high
electrical
global
efficiencies
(63.6
%
70
%,
respectively),
density
(404
kWh/m3)
partial
dioxide
re-utilization
net
zero
emissions.
Energy Conversion and Management,
Journal Year:
2024,
Volume and Issue:
308, P. 118404 - 118404
Published: April 10, 2024
Typical
solar
power
tower
(SPT)
systems
employ
molten
salt
as
the
heat
transfer
and
thermal
energy
storage
medium
to
facilitate
stable
output.
However,
these
are
constrained
by
their
limited
operating
temperature,
which
is
insufficient
supply
for
high-temperature
electrolysis.
In
this
paper,
a
small-scale
(2.5
MW)
solar-thermal-assisted
system
with
SPT,
supercritical
CO2
(SCO2)
Brayton
cycle,
solid
oxide
electrolysis/fuel
cells
(SOEC/SOFC)
proposed.
With
via
air,
SOEC
subsystem
can
operate
at
800
℃
reach
high
efficiency
reduce
electric
demand,
replaces
conventional
waste
from
flue
gas
produced
fossil
fuel
combustion.
Such
convert
excess
electricity
into
hydrogen
or
sale
provides
24
h
day.
The
key
factors
determining
performance
investigated,
including
turbine
inlet
parameters,
main
compressor
recompression
fraction
of
SCO2
subsystem,
temperature
current
density
SOEC/SOFC
subsystems.
case
study
shows
that
net
output
13365.4
kWh/d
in
summer
℃,
86.7
%
higher
compared
7157.6
when
600
℃.
To
recoup
investment
costs
20th
year,
must
be
priced
6.5
$/kg.
After
multi-objective
optimization,
optimal
exergy
capital
SPT-SCO2-SOEC
determined
29.6
3.65
M$,
respectively.
For
SOFC
corresponding
figures
56.1
0.23
M$
investment.
This
benefits
generation
production
Thermal Science and Engineering Progress,
Journal Year:
2024,
Volume and Issue:
49, P. 102474 - 102474
Published: Feb. 19, 2024
This
study
addresses
restricted
thermal
conductivity
in
phase
change
materials
(PCMs)
used
latent
heat
storage
(LHS)
systems,
aiming
to
enhance
transfer
efficiency
by
intensifying
convective
flow
using
a
novel
wedge
fin
design.
A
comparative
experimental
analysis
is
performed
between
wedge-finned
and
annular-finned
tube
exchangers
(HXs),
assuming
equal
material.
Results
show
that
the
HX
achieves
higher
Nusselt
numbers,
improved
distribution,
remarkable
12.8%
reduction
melting
time
compared
at
fluid
(HTF)
temperature
of
90℃.
Furthermore,
exhibits
substantial
84.3%
decrease
bare
HX.
These
findings
highlight
practical
significance
employing
design
for
improving
LHS
offering
valuable
insights
optimization
such
systems.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(26)
Published: March 21, 2024
Abstract
High‐temperature
thermochemical
energy
storage
based
on
metal
oxides
is
the
key
technology
to
reducing
levelized
costs
of
electricity
next‐generation
concentrated
solar
power
plants.
CuO/Cu
2
O
has
wide
availability
and
high
density,
but
severe
sintering
leads
low
reactivity.
In
this
study,
an
innovative
approach
modulate
oxygen
vacancy
content
change
surface
properties
crystal
structure
enhance
resistance
redox
reversibility
proposed.
The
re‐oxidation
degree
increased
from
46%
99%,
release
rate
by
3.5
times.
It
remains
99.9%
reduction
97.1%
oxidation
activity
after
3000
cycles,
which
very
valuable
for
engineering
applications.
Cu
MgO
3
Mg
0.78
0.22
are
prone
form
vacancies,
promotes
formation
porous
structures.
Mg0
.78
helps
/CuO/Cu
deliver
more
through
surface.
firmly
uniformly
dispersed
long
cycling.
They
have
a
large
binding
energy,
charge
transfer
enhanced
bond
at
interface.
mechanism
composite
in
increasing
temperature
long‐term
reaction
stability
revealed
experimental
theoretical
calculations,
provides
new
idea
rational
design
materials.
Heliyon,
Journal Year:
2024,
Volume and Issue:
10(15), P. e35464 - e35464
Published: Aug. 1, 2024
The
solar
pyrolysis
of
materials
has
emerged
as
a
promising
technology
for
their
efficient
conversion
into
solid
char,
syngas
and
oil.
its
challenges,
however,
constraints
such
intermittence
scalability
must
be
overcame
to
thrive.
present
work
presents
review
the
developments
in
considering
development
by
country,
employed,
etcetera.
Moreover,
details
on
challenges
potential
future
are
presented.
It
was
found
that
most
been
focused
waste-handling,
particular
challenge
exists
an
adequate
control
system
achieve
desired
end
products.
