Journal of Thermal Analysis and Calorimetry,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 26, 2024
Abstract
An
important
measure
that
shows
the
total
amount
of
greenhouse
gases
released
into
environment
is
carbon
footprint
by
using
fossil
fuels.
Sustainable
alternatives
are
seen
as
an
effective
step
in
both
preventing
depletion
fuels
and
combating
climate
change.
To
overcome
these
negative
consequences,
use
area
with
hydrogen
becoming
increasingly
popular
among
fuel
researchers.
However,
application
a
can
potentially
increase
NOx
emissions.
For
this
reason,
water–urea
solution
5%
volume
was
added
to
diesel–hydrogen
dual
engine.
Subsequently,
intake
manifold
supplied
1
LPM
hydrogen.
Different
engine
loads
were
evaluated,
while
diesel
operated
at
1500
rpm
rated
speed.
As
result,
addition
urea
led
decrease
BSFC
23%
improvement
thermal
efficiency
25%
compared
fuel.
Blend
oil
decreased
EGT
2%
lower
than
oil.
NOx,
CO,
HC
CO
2
concentrations
5,
61,
13
53%,
respectively,
when
mixed
about
Engine
performance
may
be
improved,
exhaust
pollutants
reduced
utilizing
combined
alternative
International Journal of Energy Research,
Год журнала:
2025,
Номер
2025(1)
Опубликована: Янв. 1, 2025
The
use
of
biodiesel
is
becoming
inevitable
due
to
the
depletion
fossil
fuel
resources.
Biodiesel
an
attractive
alternative
derived
from
natural
oils
and
can
be
used
directly
in
diesel
engines
with
no
major
change.
However,
various
biodiesels
may
exhibit
different
performance
behaviors
emission
characteristics,
some
performing
worse
than
fuel.
present
research
work
investigates
performance,
combustion,
behavior
rubber
seed
(RSB)/diesel
blends
(B20,
B30,
B40)
B20
+
ethyl
hexyl
nitrate
(EHN)
at
four
injection
timings
(19°,
21°,
25°,
27°
before
top
dead
center
[BTDC])
a
single‐cylinder
DI
engine.
Combustion
biodiesel/diesel
generally
resulted
except
smoke
emission.
addition
EHN
reduced
hydrocarbon
(HC)
emissions
but
negatively
impacted
brake‐specific
consumption
(BSFC)
brake
thermal
efficiency
(BTE).
advanced
timing
not
only
restored
combustion
parameters
level
also
brought
them
closer
those
Advancing
BTDC
improved
BSFC
BTE
by
3%
4%
compared
B20,
respectively.
Additionally,
HC
decreased
strongly
80%
73%,
15%
16%,
respectively,
values.
A
slight
improvement
NO
x
(by
2%)
was
observed
B20.
An
increase
cylinder
pressure
66.2
67.4
bar
timing,
contributing
engine
performance.
Analysing
characteristics
showed
that
RSB/diesel
blends,
when
doped
EHN,
offer
better
making
suitable
replace
usage
developing
countries
like
India.
Processes,
Год журнала:
2025,
Номер
13(3), С. 758 - 758
Опубликована: Март 6, 2025
The
tubular
flocculation
reactor
is
a
new
and
efficient
device
for
treating
algae-containing
wastewater.
introduction
of
bubbles
during
the
reaction
process
can
effectively
shorten
time
required
floc
separation.
However,
impact
on
formation
removal
in
not
well
understood.
To
further
clarify
effect
reactor’s
operation,
this
study
employed
uniform
experimental
design,
varying
flow
rate,
chemical
dosage,
bubble
distance,
injection
rate
to
examine
influence
under
different
operating
conditions.
results
indicated
that
as
distance
increased
from
0
m
7.6
m,
efficiency
60%
70%,
size
160
μm
165
μm,
fractal
dimension
decreased
2.1
1.9.
When
volume
5%
30%,
50%
80%.
Under
constant
conditions,
rising
speed
flocs
0.4
mm·s−1
1.2
mm·s−1,
while
30%
90%.
A
logarithmic
correlation
was
observed
between
efficiency.
linear
relationship
found
size,
with
increasing
200
800
2.3
mm·s−1.
An
exponential
speed,
decreasing
1.93
2.02.
Bioengineering,
Год журнала:
2024,
Номер
11(7), С. 722 - 722
Опубликована: Июль 16, 2024
Microalgae
are
a
valuable
source
of
lipids,
proteins,
and
pigments,
but
there
challenges
in
large-scale
production,
especially
harvesting.
Existing
methods
lack
proven
efficacy
cost-effectiveness.
However,
flocculation,
an
energy-efficient
technique,
is
emerging
as
promising
solution.
Integrating
surfactants
enhances
microalgal
harvesting
disruption
simultaneously,
reducing
processing
costs.
This
study
investigated
cetyltrimethylammonium
bromide
(CTAB),
dodecyltrimethylammonium
(DTAB),
sodium
dodecyl
sulphate
(SDS)
for
Tetraselmis
sp.
strains
(75LG
46NLG).
CTAB
exhibits
superior
results,
with
88%
efficiency
at
1500
2000
mg
L−1
75LG
46NLG,
respectively,
60
min
sedimentation—thus
being
able
to
reduce
the
operating
time.
Beyond
evaluating
efficiency,
our
explored
kinetics
process;
modified
Gompertz
model
led
best
fit.
Furthermore,
largest
kinetic
constants
were
observed
CTAB,
thus
highlighting
its
optimising
process.
With
incorporation
suggested
enhancements,
which
should
be
addressed
future
work,
could
hold
potential
optimise
cost-effective
sustainable
eventually
unlocking
commercial
microalgae
biodiesel
production.
Discover Sustainability,
Год журнала:
2024,
Номер
5(1)
Опубликована: Окт. 15, 2024
The
paper
deals
with
the
application
of
microalgae
in
building's
façade,
regard
to
broader
project
comprising
aspects
environmental
comfort
academic
spaces
and
energy
consumption
on-grid
photovoltaic
generation,
as
well
investigation
alternatives
for
improvement
performance
building
envelopes.
Thus,
its
main
objective
is
interdisciplinary
concepts
involving
Architecture
Biotechnology,
known
by
Black
Ecologies,
referring
an
investigative
interest
explore
a
new
approach
nature,
not
only
related
architectural
space,
but
emergent
focus.
This
relationship
performed
using
photobioreactors
microalgae,
installed
on
façades
buildings
educational
use.
present
work
presents
methodological
outline
research,
based
literature
review
case
studies;
complementary
experimental
methodologies
are
also
presented
contextualize
subject
feasibility.
current
state
art
showed
terms
international
level,
Brazilian
context
any
further
research
was
identified
yet.
In
addition
thermal
performance,
strategies
will
allow
process
sequestration
carbon
dioxide
other
GHG
(greenhouse
gases)
that
impacts
climate
change
can
contribute
reach
sustainable
development.
coincides
discussions
2050
scenarios
emission
reduction,
which
were
faced
at
recent
COP-27
connections
integrative
way
United
Nations
Sustainable
Development
Goals.
Processes,
Год журнала:
2024,
Номер
12(12), С. 2736 - 2736
Опубликована: Дек. 3, 2024
To
mitigate
the
emissions
of
greenhouse
gases
(GHGs)
from
fossil
fuels,
use
biodiesel
and
its
sustainable
production
have
been
receiving
more
attention
over
past
decade,
especially
for
reuse
waste
cooking
oils
non-edible
as
starting
feedstocks.
For
process,
suitability
a
green
catalyst
is
core
function
in
transesterification
reaction.
Heterogeneous
(solid-state)
catalysts
are
generally
superior
to
homogeneous
(liquid-state)
due
several
significant
advantages
such
no
saponification
products
formed,
recyclability,
less
equipment
corrosion.
Recent
studies
also
revealed
that
heterogeneous
solid
base
were
widely
used
biodiesel.
Furthermore,
biomass-based
ash
derived
herbaceous
agricultural
biomass
increasing
rapidly
because
environmental
sustainability,
high
yield,
low
cost.
highlight
alternative
residues,
this
mini-review
paper
thus
focused
on
summary
various
potassium-rich
materials,
which
Due
abundant
quantity
chemical
compositions,
it
was
found
cocoa
pod
husk
may
be
most
commonly
producing
literature.
Finally,
future
perspectives
by
adopting
emerging
technologies
using
high-potassium
(K)
addressed.
Fuels,
Год журнала:
2024,
Номер
5(4), С. 868 - 894
Опубликована: Дек. 3, 2024
The
urgent
need
to
address
environmental
issues
associated
with
the
use
of
conventional
fossil
fuels
has
driven
rapid
evolution
global
energy
landscape.
This
review
explores
background
and
significance
3-G
biofuel
production,
emphasizing
shift
towards
sustainable
alternatives
amidst
escalating
greenhouse
gas
emissions.
While
various
renewable
sources
have
gained
prominence,
biofuels
emerged
as
a
promising
solution
for
transportation
industrial
sectors,
particularly
from
microalgal
biomass.
rationale
focusing
on
biomass
is
based
its
technical
advantages.
Unlike
traditional
feedstocks,
microalgae
boast
high
lipid
content,
enhancing
production
efficiency.
Their
growth
rates
efficient
carbon
dioxide
sequestration
make
frontrunners
in
scalable
production.
aims
comprehensively
analyze
recent
breakthroughs
biomass,
filling
gaps
existing
literature.
topics
covered
included
species
diversity,
cultivation
techniques,
harvesting,
pretreatment,
extraction
methods,
pathways.
Genetic
engineering,
downstream
processing,
energy-efficient
practices,
emerging
trends,
such
artificial
intelligence
cross-disciplinary
collaboration,
will
be
explored.
study
consolidate
research
findings,
identify
challenges
opportunities,
guide
future
directions
biomass-based
By
synthesizing
unpublished
research,
this
seeks
advance
our
knowledge
provide
insights
researchers
foster
