Fire,
Год журнала:
2024,
Номер
7(11), С. 401 - 401
Опубликована: Ноя. 1, 2024
Recent
incidents
of
fire
accidents
attributed
to
oil
combustion
have
emerged
as
a
significant
threat
both
industrial
safety
and
environmental
conservation.
In
this
study,
the
thermal
oxidation
analysis
kinetics
parameters
transformer
oil,
engine
hydraulic
in
air
atmosphere
were
explored
based
on
thermogravimetric-differential
scanning
calorimetry
(TG-DSC).
Industrial
oils
showed
same
decomposition
process
process.
The
peak
temperature
DSC
curve
was
higher
than
that
DTG
curve,
values
curves
increased
with
increase
heating
rate.
underwent
main
mass
loss
process,
respective
ranges
approximately
80–84%
for
73–79%
86–89%
oil.
Notably,
demonstrated
highest
average
apparent
activation
energy,
amounting
110.50
kJ/mol,
significantly
surpassing
(105.13
kJ/mol)
(60.95
kJ/mol).
optimal
kinetic
model
evaporative
reaction
identified
order
(Fn),
corresponding
mechanism
function
expressed
f(α)
=
(1
−
α)n.
use
TG-DSC
offers
novel
perspectives
stability
evaluation
products.
Meanwhile,
typical
evaporation
determined,
possessing
good
reference
application
Chemical Engineering Journal,
Год журнала:
2024,
Номер
491, С. 151668 - 151668
Опубликована: Апрель 26, 2024
Integrated
carbon
capture
and
utilisation
(ICCU)
is
an
emerging
technology
for
simultaneous
CO2
adsorption
conversion
into
value-added
products.
This
provides
a
more
sustainable
approach
compared
to
storage.
Dual-functional
materials
(DFMs)
that
couple
sorbents
(e.g.
CaO)
catalysts
Ni)
enable
direct
of
sorbed
reactions
like
dry
reforming
methane
(DRM).
However,
the
potential
interactions
between
sorbent
catalyst
components
within
DFMs
may
induce
distinct
mechanisms
individual
materials.
Elucidating
these
synergies
interfacial
phenomena
vital
guiding
rational
design
DFMs.
article
investigates
respective
roles
Ni/SiO2
sol–gel
synthesised
CaO
in
integrated
via
(ICCU-DRM)
using
decoupling
approach.
Through
decoupled
reactor
experiments,
it
found
activates
react
with
deposits
from
CH4
decomposition,
achieving
maximal
CO
H2
yields
43.41
mmol
g−1
46.78
as
well
87.2
%
at
650
°C.
Characterisation
shows
coke
would
encapsulate
Ni
nanoparticles
be
active
Boudouard
reaction,
indicating
sufficient
catalyst-sorbent
contact
necessary
spillover.
In-situ
DRIFTS
reveals
no
obvious
CH4-CaCO3
reaction
occurs,
chemisorption
on
enables
reverse
which
further
verified
by
DFT
calculations.
The
findings
elucidate
dependent
synergistic
CaO/CaCO3
ICCU-DRM,
highlight
importance
catalyst-adsorbent
optimising
dual-functional
Abstract
Methane
photooxidation
into
methanol
offers
a
practical
approach
for
the
generation
of
high‐value
chemicals
and
efficient
storage
solar
energy.
However,
propensity
C─H
bonds
in
desired
products
to
cleave
more
easily
than
those
methane
molecules
results
continuous
dehydrogenation
process,
inevitably
leading
peroxidation.
Consequently,
inhibiting
peroxidation
is
perceived
as
one
most
formidable
challenges
field
direct
conversion
methanol.
This
review
thorough
overview
typical
mechanisms
involved
radical
mechanism
active
site
regulatory
methods
employed
inhibit
product
photooxidation.
Additionally,
several
perspectives
on
future
research
direction
this
crucial
are
proposed.
Abstract
Methane,
a
main
component
of
natural
gas,
shale
and
combustible
ice,
is
widely
distributed
in
nature.
The
direct
conversion
efficient
utilization
methane
have
become
crucial
topics
within
the
scientific
community.
However,
two
challenges
persist
this
field:
activation
overoxidation
inhibition.
Recently,
research
on
subject
has
reached
its
pinnacle
stage.
Herein,
we
present
some
works
addressing
these
concerns,
particularly
employing
photocatalytic
approaches,
with
specific
focus
strategies
aimed
at
enhancing
selectivity
towards
methanol
as
desired
product.
Finally,
discuss
existing
propose
potential
solutions
for
advancing
methane‐to‐methanol
technology.
Direct
photocatalytic
methane
oxidation
into
value-added
products
provides
a
promising
strategy
for
utilization.
However,
the
inefficient
generation
of
reactive
oxygen
species
(ROS)
partly
limits
activation
CH
Atmosphere,
Год журнала:
2023,
Номер
14(10), С. 1538 - 1538
Опубликована: Окт. 8, 2023
C2+
hydrocarbons,
especially
olefins,
as
important
basic
chemical
raw
materials,
mainly
come
from
petroleum
cracking.
With
the
increasing
scarcity
of
resources,
search
for
new
olefins
production
routes
has
become
focus
research,
and
by
oxidative
coupling
methane
(OCM)
process
attracted
extensive
attention.
The
OCM
route
is
an
alternative
to
resources
also
direction
development
efficient
clean
utilization
natural
gas.
In
this
paper,
mechanism,
catalysts,
other
key
factors
are
reviewed.
mechanism
OCM,
including
reaction
pathway
formation
intermediate
products,
introduced.
Then,
commonly
used
such
alkali
metal/alkaline
earth
metal
oxides,
rare
composite
oxides
with
special
structures,
classical
catalysts
Mn/Na2WO4/SiO2,
their
mechanisms
action
in
discussed.
addition,
application
looping
(CLOCM)
olefin
investigated,
which
a
promising
way
due
high
selectivity
low
cost
owing
excellent
performance
catalyst
recycling.
These
studies
will
help
further
understand
provide
guidance
support
applications
related
fields.
International Journal of Thermofluids,
Год журнала:
2023,
Номер
20, С. 100510 - 100510
Опубликована: Ноя. 1, 2023
This
study
presents
a
comprehensive
investigation
of
thermally
integrated
membrane
micro
reactor
for
efficient
hydrogen
production
through
the
conversion
methane
with
water
vapor.
The
design
incorporates
catalytic
Au/ZnO
system
to
enhance
performance.
effects
key
operational
variables,
including
inlet
gas
flow
rate,
pressure,
temperature,
water-to-methane
ratio,
and
thickness,
were
examined.
Optimal
conditions
sought
maximize
conversion,
yield,
minimize
carbon
monoxide
production.
As
feed
increases,
decreases
due
reduced
retention
time
in
reactor.
decrease
is
almost
six
times
greater
at
240°C
than
270°C.
Higher
ratios
improved
Shell
pressure
affected
higher
pressures
resulting
decreased
rates
levels.
shell
airflow
velocity
rises
about
0.96%.
Tube
influenced
passage
membrane,
causing
output
from
tube
section
increased
section,
while
reducing
emissions.
These
findings
contribute
optimization
vapor-methane
conversion.
