Processes,
Год журнала:
2024,
Номер
12(11), С. 2410 - 2410
Опубликована: Ноя. 1, 2024
Extractive
metallurgy,
combined
with
mineral
processing,
is
at
the
heart
of
modern
industry,
facilitating
transformation
raw
resources
into
valuable
metals
essential
for
infrastructure,
technology,
and
energy
systems
[...]
Metals,
Год журнала:
2024,
Номер
14(5), С. 589 - 589
Опубликована: Май 17, 2024
This
paper
focuses
on
the
study
of
current
knowledge
regarding
use
hydrogen
as
a
reducing
agent
in
metallurgical
processes
iron
and
steel
production.
focus
is
driven
by
need
to
introduce
environmentally
suitable
energy
sources
agents
this
sector.
theoretical
primarily
examines
laboratory
research
reduction
Fe-based,
metal-bearing
materials.
The
article
presents
critical
analysis
oxides
using
hydrogen,
highlighting
advantages
disadvantages
method.
Most
experimental
facilities
worldwide
employ
their
unique
original
methodologies,
with
techniques
based
Thermogravimetric
(TGA)
devices,
fluidized
beds,
retorts
being
most
common.
indicates
that
mineralogical
composition
Fe
ores
used
plays
crucial
role
reduction.
Temperatures
during
typically
range
from
500
900
°C.
reaction
rate
degree
increase
higher
temperatures,
transformation
wüstite
slowest
step.
Furthermore,
demonstrates
ore
occurs
more
intensively
quickly
than
carbon
monoxide
(CO)
or
hydrogen/carbon
(H2/CO)
mixture
temperature
°C
establishes
superior
for
oxides,
offering
rapid
kinetics
compared
traditional
carbon-based
methods
across
broad
range.
These
findings
underscore
hydrogen’s
potential
significantly
reduce
greenhouse
gas
emissions
production
industry,
supporting
shift
towards
sustainable
manufacturing
practices.
However,
implementation
primary
industrial
settings
constrained
technological
limitations
substantial
infrastructural
developments
support
large-scale
utilization.
Renewable Energy,
Год журнала:
2024,
Номер
235, С. 121297 - 121297
Опубликована: Сен. 3, 2024
Steel
metallurgy
accounts
for
about
7%
of
global
greenhouse
gas
emissions
and
its
decarbonation
is
a
major
issue.
The
direct
reduction
iron
ore
with
H2
using
concentrated
solar
heat
offers
carbon-free
route
the
metallurgical
process.
Such
process
clean
ironmaking
has
never
been
implemented
before.
This
study
aims
to
investigate
reaction
characteristics
further
proposes
first
experimental
demonstration
reduced
production
in
packed-bed
reactor
under
real
irradiation.
Fe2O3
was
studied
by
thermogravimetric
analysis
unravel
effect
temperature,
mole
fraction
particle
size.
rate
increased
temperature
(400-800°C)
(25-75%),
reached
completion
an
initial
conversion
starting
from
370°C.
An
activation
energy
38.5
30.4
kJ/mol
determined
commercial
ore,
respectively.
size
particles
after
pellets
crushing
(in
range
0.25-2
mm)
did
not
significantly
affect
rate.
However,
fine
micron
powder
low
bulk
density
showed
improved
rates.
Finally,
demonstrated
solar-heated
up
1000°C,
confirming
feasibility
renewable
complete
at
moderate
temperatures
above
400°C,
thus
paving
way
toward
steel
industry.
Processes,
Год журнала:
2024,
Номер
12(11), С. 2434 - 2434
Опубликована: Ноя. 4, 2024
For
centuries,
fossil
fuels
have
been
the
primary
energy
source,
but
their
unchecked
use
has
led
to
significant
environmental
and
economic
challenges
that
now
shape
global
landscape.
The
combustion
of
these
releases
greenhouse
gases,
which
are
critical
contributors
acceleration
climate
change,
resulting
in
severe
consequences
for
both
environment
human
health.
Therefore,
this
article
examines
potential
hydrogen
as
a
sustainable
alternative
source
capable
mitigating
impacts.
It
explores
properties
hydrogen,
with
particular
emphasis
on
its
application
industrial
burners
furnaces,
underscoring
clean
high
density
comparison
fuels,
also
production
through
thermochemical
electrochemical
methods,
covering
green,
gray,
blue,
turquoise
pathways.
discusses
storage
transportation
challenges,
highlighting
methods
like
compression,
liquefaction,
chemical
carriers
(e.g.,
ammonia),
transport
via
pipelines
vehicles.
Hydrogen
mechanisms
optimized
burner
furnace
designs
explored,
along
benefits
lower
emissions,
contrasted
concerns
infrastructure
costs.
Additionally,
applications,
safety
concerns,
large-scale
adoption
addressed,
presenting
promising
yet
complex
fuels.