Plasma Processes and Polymers,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 3, 2024
ABSTRACT
CO
2
reforming
of
CH
4
to
syngas
(H
and
CO)
has
emerged
as
one
the
attractive
options
for
mitigating
carbon
emissions.
Here,
a
water‐cooled
dielectric
barrier
discharge
plasma
reactor
been
constructed
–CH
produce
value‐added
chemicals.
The
effects
main
parameters
(i.e.,
power,
/CO
molar
ratio,
gas
flow
rate)
on
were
investigated.
highest
conversion
rate
was
found
be
40.57%
27.15%,
respectively,
with
H
selectivity
56.07%
43.71%,
respectively.
total
energy
efficiency
achieved
0.28
mmol/kJ.
C
6
hydrocarbon
product.
Lastly,
mechanism
proposed
in
terms
active
species
products.
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(21), P. 21287 - 21299
Published: Oct. 15, 2024
Direct
methanation
of
carbon
dioxide
(CO2)
in
coal-fired
flue
gas
presents
a
promising
approach
for
achieving
neutrality
without
the
energy-intensive
CO2
capture
process.
However,
traditional
Ni-based
catalysts
are
easily
deactivated
by
sulfur
poisoning.
In
this
study,
sulfur-tolerant
Ni/γ-Al2O3
catalyst
with
Fe
modification
(xFe–Ni/A)
was
developed,
and
promoting
mechanisms
were
elucidated.
Experimental
results
showed
that
1Fe–Ni/A
exhibited
optimal
loading
maintained
good
activity
presence
SO2.
It
revealed
addition
facilitated
formation
Ni–Fe
alloy
modulated
catalyst's
surface
chemistry,
thereby
reaction
activity.
Furthermore,
physicochemical
SO2
adsorption
properties
suggested
not
only
functioned
as
protective
agent
Ni
sites
against
but
also
inhibited
overall
adsorption,
resulting
enhanced
resistance.
This
study
provides
valuable
guidance
design
doping
sacrificial
modulating
using
non-noble
metals,
laying
foundation
scale-up
industrial
applications
utilization
SO2-containing
environment.
Research Square (Research Square),
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 4, 2024
Abstract
The
radiological
concentration
and
distribution
of
natural
radionuclides
232Th,
226Ra,
40K
in
the
surface
sediments
two
steam
power
plants
(SPP)
vicinity
were
investigated.
Sediment
samples
analyzed
for
radionuclides,
organic
matter,
grain
size
composition.
average
activity
226Ra
Semarang
are
71.485
Bq·kg−1;
29.645
Bq·kg−1
570.459
Cirebon
90.593
41.709
725.788
Bq·kg−1,
respectively.
According
to
Indonesian
standards
concentrations
still
below
recommended
values.
radionuclide
levels
influenced
more
by
proximity
coal
resources,
than
other
factors
such
as
content,sediment
texture,
hydrodynamic
processes.
These
data
can
be
considered
baseline
this
region
used
reference
or
information.
Thus,
obtained
study
did
not
show
any
significant
health
risk
ecosystem
nearby
areas
SPP.
Radiological
parameters
absorbed
dose
rate
(Din),
utilization
index
(AUI),
annual
effective
equivalent
(AEDEin),
gonadal
(AGDE),
radium
(Raeq),
hazard
indices
(Hex,
Hin)
showed
some
excess
values
when
compared
standards.However,
they
comparable
from
parts
world.
Indian Journal of Science and Technology,
Journal Year:
2024,
Volume and Issue:
17(9), P. 830 - 840
Published: Feb. 27, 2024
Objectives:
The
production
of
conventional
cement
blocks
consumes
significant
amount
cement.
cement,
involves
energy
consumption
and
releases
carbon
dioxide
emissions,
contributing
to
footprint.
However,
advancements
in
sustainable
masonry
block
have
been
made
minimize
these
drawbacks.
Hence,
this
research
aims
develop
a
solid
by
incorporating
Rice
Husk
Ash
(RHA)
Flay
(FA).
Methods:
manuscript
discusses
the
mechanical
durability
properties
comparing
result
with
blocks.
materials
used
are
FA,
Lime,
Gypsum,
RHA,
Marble
Dust
Powder
(MDP),
Stone
Quarry
(SQD).
tested
for
Compressive
strength,
Density,
Water
absorption,
Initial
rate
water
efflorescence,
chemical
resistance.
Findings:
results
showed
that,
addition
MDP
enhanced
compressive
strength
upto
46%
when
compared
convention
block.
A
density
reduction
2.5%
was
achieved.
It
also
exhibited
absorption
29.2%.
IRA
tests
evident
that
shows
reduced
levels
at
both
one-minute
two-minute
time
intervals
comparison
At
time,
M4
is
69%
lower
FA
admixed
better
terms
Novelty
:
This
method
an
innovative
methodology
supports
conservation
natural
resources,
reduces
pollution,
preserves
environment.
As
result,
it
encourages
advancement
eco-friendly
technology.
Keywords:
Sustainable
building
blocks,
Fly
ash,
husk
dust,
quarry
dust
Case Studies in Chemical and Environmental Engineering,
Journal Year:
2024,
Volume and Issue:
10, P. 100883 - 100883
Published: Aug. 11, 2024
This
study
explores
the
use
of
waste
coal
fly
ash
supported
with
magnetite
(FA/Fe3O4)
as
an
environmentally
friendly
adsorbent
for
removing
Pb
metal
from
aqueous
solutions.
FA/Fe3O4
composites
were
synthesized
using
ball
mill
method
varying
ratios
(9:1,
9:3,
and
9:5).
The
sample
a
9:3
ratio
exhibited
most
promising
characteristics,
including
high
surface
area
(4.878
m2/g),
substantial
pore
volume
(2.508
cc/g),
large
average
diameter
(3.060
nm),
low
crystallinity
(12.98
%),
small
crystal
size
(28.41
non-uniform
particle
morphology
(average
2.6
μm).
Optimal
conditions
removal
achieved
adsorbent,
showing
95.50
%
adsorption
efficiency
at
30
mg
mass,
98.83
pH
4,
99.45
concentration
25
ppm.
These
findings
indicate
that
provide
highly
efficient
straightforward
removal,
offering
significant
practical
value
in
environmental
applications.
Plasma Processes and Polymers,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 3, 2024
ABSTRACT
CO
2
reforming
of
CH
4
to
syngas
(H
and
CO)
has
emerged
as
one
the
attractive
options
for
mitigating
carbon
emissions.
Here,
a
water‐cooled
dielectric
barrier
discharge
plasma
reactor
been
constructed
–CH
produce
value‐added
chemicals.
The
effects
main
parameters
(i.e.,
power,
/CO
molar
ratio,
gas
flow
rate)
on
were
investigated.
highest
conversion
rate
was
found
be
40.57%
27.15%,
respectively,
with
H
selectivity
56.07%
43.71%,
respectively.
total
energy
efficiency
achieved
0.28
mmol/kJ.
C
6
hydrocarbon
product.
Lastly,
mechanism
proposed
in
terms
active
species
products.
