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.
ACS Omega,
Journal Year:
2022,
Volume and Issue:
7(37), P. 33397 - 33407
Published: Sept. 8, 2022
This
research
investigated
the
performance
of
dioctyl
sodium
sulfosuccinate
(DSS),
a
double-chain
anionic
surfactant,
in
breaking
crude
oil-in-water
emulsions.
The
response
surface
methodology
was
used
to
consider
effect
DSS
concentration,
oil
and
shaking
time
on
demulsification
efficiency
obtain
optimum
conditions.
Further
single-factor
experiments
were
conducted
investigate
effects
salinity,
conditions
(fresh
weathered),
gravity
separation
settling
time.
results
showed
that
efficiently
demulsified
stable
emulsions
under
different
concentrations
(500-3000
mg/L)
within
15
min
Increasing
concentration
900
mg/L
(critical
micelle
concentration)
increased
99%.
not
only
improved
but
also
did
impede
demulsifier
interfacial
adsorption
at
oil-water
interface
due
presence
structure.
low
molecular
weight
enables
homogeneous
distribution
molecules
emulsion,
leading
high
min.
Analysis
variance
indicated
importance
considering
interaction
demulsification.
could
reduce
total
extractable
petroleum
hydrocarbons
separated
water
<10
without
achieve
promising
salinity
(36
g/L)
various
fresh
weathered
oil.
mechanism
explained
by
analyzing
microscopic
images
transmittance
emulsion.
be
an
efficient
surfactant
demulsifying
