Frontiers in Energy Research,
Год журнала:
2024,
Номер
12
Опубликована: Фев. 8, 2024
Redox
and
melting
characteristics
of
Mn-based
ores
were
investigated
to
test
their
potential
use
in
thermochemical
energy
storage
(TCES).
Two
materials
(FJ
LY)
natural
with
the
Mn
content
higher
than
35
wt%,
one
material
was
prepared
by
adding
an
MgO–kaolin
inert
support
into
LY
increase
its
temperature.
Cyclic
reduction
oxidation
reactivity
these
studied
via
thermogravimetric
analysis
(TGA),
behaviors
using
a
setup
optical
camera–image
system.
It
found
that
oxygen
capacity
FJ
ore
can
approach
∼1.50
while
had
only
0.42
wt%–0.69
wt%
The
deformation
temperature
is
ore,
temperatures
be
significantly
improved
addition
support,
decreased
due
material.
This
study
proves
manganese
high
have
as
TCES
materials.
For
some
low
temperatures,
it
necessary
improve
ensure
for
high-temperature
applications.
Processes,
Год журнала:
2024,
Номер
12(8), С. 1548 - 1548
Опубликована: Июль 24, 2024
The
integrated
CO2
capture
and
utilization
coupled
with
the
reverse
water-gas
shift
reaction
(ICCU-RWGS)
presents
an
alternative
pathway
for
converting
captured
into
CO
in
situ.
This
study
investigates
effectiveness
of
three
calcium-based
materials
(natural
limestone,
sol-gel
CaCO3,
commercial
CaCO3)
as
dual-functional
(DFMs)
ICCU-RWGS
process
at
intermediate
temperatures
(650–750
°C).
Our
approach
involves
a
fixed-bed
reactor
mass
spectrometry
situ
Fourier
transform
infrared
(FTIR)
measurements
to
examine
cyclic
behavior,
detailed
physical
chemical
properties,
morphology.
FTIR
results
revealed
dominance
RWGS
route
exhibited
self-catalytic
activity
across
all
materials.
Particularly,
natural
limestone
demonstrated
yield
12.7
mmol
g−1
100%
selectivity
81%
conversion.
Over
20th
cycle,
decrease
capacity
was
observed:
CaCO3
showed
reductions
44%,
61%,
59%,
respectively.
suggests
inevitable
deactivation
during
reactions
process,
while
skeleton
structure
effectively
prevents
agglomeration
Ca-based
materials,
particularly
CaCO3.
These
insights,
cost-effectiveness
CaO-alone
DFMs,
offer
promising
avenues
efficient
economically
viable
processes.
