SSRN Electronic Journal,
Journal Year:
2021,
Volume and Issue:
unknown
Published: Jan. 1, 2021
Although
massive
materials
and
diverse
methods
have
been
developed
for
the
treatment
of
oil/water
mixtures,
continually
separating
mixtures
particularly
water-in-oil
emulsion
is
still
a
severe
challenge.
Herein,
we
presented
dual-layered
fiber
membrane
continuously
via
coalescence
demulsification.
The
proposed
consisted
layer
coalescing
layer,
its
structures
surface
wettability
were
rationally
designed.
As
consequence,
as-prepared
could
separate
emulsions
with
separation
efficiency
higher
than
99.6%
permeation
flux
up
to
50000
L/m
2
h,
as
well
it
an
volume
3L
within
8
min,
which
10~200
times
that
state-of-the-art
membranes
reported
previously.
Besides,
demulsification
process
emulsified
water
droplets
on
was
directly
observed
investigated
experiments
simulations,
mechanism
thoroughly
revealed,
provides
theoretical
guidance
inspiration
scientists
engineers
develop
novel
advanced
separators.
The Journal of Physical Chemistry C,
Journal Year:
2023,
Volume and Issue:
127(30), P. 14645 - 14655
Published: July 19, 2023
In
this
study,
palmitoyl
and
hindered
phenolic
hyperbranched
polyglycerol
(CBHPG),
with
(HPG)
as
the
structural
core
phenol
or
alkyl
chain
decorated
shell,
has
been
strategically
designed
synthesized
an
efficient
integrated
additive
to
enhance
energy
efficiency
inhibit
oxidation
coking
of
hydrocarbon
fuels.
The
superior
thermal
stability
solubility
CBHPG
were
confirmed
by
gravimetric
analysis
dynamic
light
scattering.
presence
high
antioxidant
activity,
induction
time
n-undecane
increased
more
than
2-fold
at
170
°C.
deposition
tests,
amphiphilic
macromolecule
showed
excellent
performance
58%
inhibition
rate
Chinese
Jet
Fuel
(RP-3).
Thermal
Oxidation
Stability
test
355
°C
also
exhibited
that
could
greatly
reduce
deposit
RP-3
decreasing
rating
from
>4
<1.
cracking
experiments,
addition
0.1
wt
%
sufficient
polymerization
increase
conversion
17.6%,
corresponding
heat
sink
6.1%
675
above
results
indicated
efficiently
fuels
due
multipurposes
in
antioxidation,
inhibition,
promotion.
a
structure
shows
great
promise
improving
safety
future
advanced
aircraft.
Molecules,
Journal Year:
2023,
Volume and Issue:
28(23), P. 7692 - 7692
Published: Nov. 21, 2023
Organic
amine
and
nanosilica
were
combined
to
create
a
nano-demulsifier,
which
was
employed
in
the
oil-water
separation
process
of
condensate
emulsion.
The
nano-demulsifier
has
structure
hyperbranched
polymers
skeleton
nanomaterials,
displays
demulsification
impact
organic
as
well
synergistic
effect
nanomaterials.
This
potential
drastically
reduce
quantity
demulsifiers
utilized
gathering
station.
dehydration
rate
lotion
gas
station
can
reach
more
than
95%
only
at
concentration
1.0
wt.%.
Its
application
significantly
increase
efficiency
emulsion
quality
oil.
It
positive
on
cost
reduction
production.
mechanism
action
demulsifier
also
studied,
results
show
that
is
phase
reverse
demulsifier.
Crude
oily
wastewaters
generate
widely
in
industries
and
marine
oil
spill
operations.
contain
stable
water
emulsion
(O/W),
their
treatment
has
been
challenging.
toxic
compounds
for
humans
the
environment,
effective
requires
meeting
environmental
regulations.
This
dissertation
aimed
to
investigate
environmentally
friendly
demulsifiers
(commercial
anionic
surfactant
ionic
liquids)
demulsifying
O/W
emulsions.
Firstly,
emulsification
process
by
ultrasonic
homogenization
was
conducted
optimize
processing
parameters
determine
required
energy
emulsion,
which
is
applicable
enhancing
crude
demulsification.
The
optimum
condition
at
a
power
level
of
76–80
W,
sonication
time
16
min,
salinity
15
g/L
NaCl,
pH
8.3,
60−70
kJ
energy.
Secondly,
commercial
showed
high
efficiency
(99%)
concentration
900
mg/L
short
shaking
(15
min)
room
temperature
(25
°C).
It
could
reduce
total
extractable
petroleum
hydrocarbons
separated
<10
without
gravity
separation
achieve
promising
demulsification
performance
(36
g/L)
various
fresh
weathered
concentrations.
Thirdly,
liquid
with
hydroxyl
functional
groups
on
side
chains
effectively
demulsified
(92%)
stabilized
natural
emulsifiers
(e.g.,
asphaltenes)
low
mg/L)
settling.
Hence,
group
suitable
substitution
alkyl
liquids
toxicity.
also
found
that
its
potency
highly
affected
type
(stabilized
emulsifiers+Tween
20),
reached
61%
50
°C
90
min
settling
time.
indicated
synergistic
interaction
Tween
20
formation
thicker
film
oilwater
interface,
performance.
Finally,
comparing
three
ammonium-based
distinct
chain
(alkyl,
ester,
amide)
it
liquid’s
hydrophilicity
greatly
influenced
emulsion.
Substitution
hydrophobic
hydrophilic
amide
or
ester
toxicity
improved
Ionic
resulted
highest
(94%)
compared
(91%)
(88%)
25
temperature,
indicating
superiority
SSRN Electronic Journal,
Journal Year:
2021,
Volume and Issue:
unknown
Published: Jan. 1, 2021
Although
massive
materials
and
diverse
methods
have
been
developed
for
the
treatment
of
oil/water
mixtures,
continually
separating
mixtures
particularly
water-in-oil
emulsion
is
still
a
severe
challenge.
Herein,
we
presented
dual-layered
fiber
membrane
continuously
via
coalescence
demulsification.
The
proposed
consisted
layer
coalescing
layer,
its
structures
surface
wettability
were
rationally
designed.
As
consequence,
as-prepared
could
separate
emulsions
with
separation
efficiency
higher
than
99.6%
permeation
flux
up
to
50000
L/m
2
h,
as
well
it
an
volume
3L
within
8
min,
which
10~200
times
that
state-of-the-art
membranes
reported
previously.
Besides,
demulsification
process
emulsified
water
droplets
on
was
directly
observed
investigated
experiments
simulations,
mechanism
thoroughly
revealed,
provides
theoretical
guidance
inspiration
scientists
engineers
develop
novel
advanced
separators.
