ACS Omega,
Journal Year:
2024,
Volume and Issue:
9(22), P. 23853 - 23863
Published: May 21, 2024
To
evaluate
the
explosion
hazard
of
CH4/H2
mixtures,
experiments
were
conducted
in
a
long
and
closed
pipeline
with
length-to-diameter
ratio
51
built-in
obstacles,
characteristic
parameters
deflagration
shock
waves
analyzed
under
different
hydrogen
blending
ratios
(0
≤
λ
100%)
equivalence
(0.5
Φ
3).
The
results
indicate
that
within
range
=
0.8–1.2,
overpressure
(PP)
exhibits
"two-zone"
structure
distribution.
When
0
80%,
PP
shows
an
initial
increase
then
decrease
both
regions,
while
to
detonation
transition
(DDT)
occurs
second
evolution
region
when
100%,
which
is
caused
by
strengths
positive
feedback
mechanism
coupled
flames
waves.
Pmax,
(dP/dt)max,
Va
show
trend
first
increasing
decreasing
monotonically
ratio,
respectively,
reach
their
maximum
values
at
1.0
100%.
For
mixtures
low
(λ
20%),
Pmax
(dP/dt)max
fuel-lean
conditions
(Φ
0.9
0.8)
are
higher
than
those
fuel-rich
1.1
1.2),
high
80
opposite.
Overall,
H2
condition
significantly
enhance
average
Va.
In
addition,
chemical
kinetics
analysis
found
R38
R52
elementary
reactions
dominant
promote
inhibit
temperature
increase,
respectively.
Their
sensitivity
coefficients
negatively
correlated
positively
ratio.
research
provide
vital
information
for
evaluating
hazards
developing
safety
protection
measures.
Sustainability,
Journal Year:
2023,
Volume and Issue:
15(21), P. 15372 - 15372
Published: Oct. 27, 2023
Given
the
growing
global
emphasis
on
sustainable
transportation
systems,
this
research
presents
a
comprehensive
approach
to
achieving
economic,
social,
and
environmental
efficiency
in
transport
within
waste
management
sector.
To
address
different
challenges
of
issues,
paper
hybrid
multi-criteria
decision-making
(MCDM)
that
incorporates
analytic
hierarchy
process
(AHP)
along
with
data
envelopment
analysis
(DEA)
for
route
selection.
By
leveraging
strengths
both
methods,
reconciles
conflicting
requirements
diverse
perspectives,
facilitating
effective
decision
making.
This
involves
identifying
relevant
criteria
evaluation,
engaging
company
experts
stakeholders
pairwise
comparisons
using
AHP.
Furthermore,
DEA
is
used
calculate
based
inputs
outputs
system.
These
evaluations
enable
identification
most
routes.
proposed
methodology
empowers
makers
policymakers
develop
an
tool
addressing
developing
countries.
The
study
contributes
body
practices
provides
insights
companies
how
optimize
routes
while
reducing
impacts.
