The Canadian Journal of Chemical Engineering,
Год журнала:
2024,
Номер
102(7), С. 2548 - 2560
Опубликована: Фев. 28, 2024
Abstract
Sulphur
compounds
and
mercaptans
in
gas
condensate
cause
corrosion
problems,
poison
catalysts
catalytic
processes,
have
adverse
environmental
impact
through
SOx
emission
upon
combustion.
Therefore,
it
is
essential
to
remove
sulphur
mercaptan
from
standard
levels.
In
this
study,
the
oxidative
desulphurization
(ODS)
process
presence
of
a
cobalt
phthalocyanine
sulfonamide‐based
catalyst
was
investigated.
The
homogeneous
containing
23
wt.%
active
material
used
optimum
operating
conditions
temperature,
volume
ratio
caustic
condensate,
concentration,
solvent
amount
were
determined
decrease
content
less
than
500
ppm
200
ppm.
consumption
all
experiments
kept
constant
at
minimum
level
(0.01
g/400
mL
condensate).
Results
showed
that
improved
reaction
rate
lower
temperature
feed
concentration.
maximum
removal
obtained
5°C
4
vol.%
16.7
Moreover,
about
5%
compared
sweeting
without
catalyst.
had
higher
solubility
acetone
rather
methanol,
by
96%
while
91%
for
methanol.
Finally,
economical
acceptable
sulfoxides
methanol
with
fraction.
Energy & Fuels,
Год журнала:
2023,
Номер
37(13), С. 9474 - 9486
Опубликована: Июнь 14, 2023
On
account
of
the
undesirable
sulfur
compounds
in
gasoline,
a
new
heterogeneous
catalyst
(PV14/NiZn2O4)
was
synthesized
successfully
by
immobilizing
Keggin-type
polyoxovanadate
(K9[PV14O42]·11H2O)
(abbreviated
as
PV14)
on
surface
nickel-zinc
oxide
(NiZn2O4).
The
physicochemical
characteristics
nanocomposite
well
its
individual
constituents
were
identified
Fourier
transform
infrared
(FTIR),
ultraviolet–visible
(UV–vis),
X-ray
diffraction
(XRD),
scanning
electron
microscopy
(SEM),
energy-dispersive
(EDX),
and
thermogravimetric
analysis-differential
thermogravimetry
(TGA-DTG)
techniques.
characterization
outcomes
indicated
that
PV14
uniformly
dispersed
over
NiZn2O4.
PV14/NiZn2O4
nanocatalyst
served
for
catalytic
oxidative
desulfurization
(Cat-ODS)
real
gasoline
model
fuel
oils
(MFOs)
with
3
mL
H2O2/AcOH
oxidizing
agent
(volume
ratio
2:1).
optimum
conditions
Cat-ODS
process
obtained
using
0.1
g
at
35
°C
after
60
min
under
atmospheric
pressure.
Based
experimental
results
described
above,
it
observed
total
concentration
present
authentic
underwent
substantial
reduction
from
0.4987
to
0.0143
wt
%,
denoting
an
efficiency
96%.
Moreover,
elimination
MFOs,
which
are
difficult
remove,
could
reach
up
95%
same
reaction
conditions.
Furthermore,
efficacy
sustained
five
cycles,
without
any
notable
performance.
Finally,
mechanism
proposed
through
generation
oxo–peroxo
intermediate
species.
Nano Letters,
Год журнала:
2023,
Номер
23(23), С. 10955 - 10963
Опубликована: Ноя. 16, 2023
Interfacial
interaction
in
carbon-supported
catalysts
can
offer
geometric,
electronic,
and
compositional
effects
that
be
utilized
to
regulate
catalytically
active
sites,
while
this
is
far
from
being
systematically
investigated
phosphide
catalysts.
Here,
we
proposed
a
novel
concept
of
electronic
phosphide-support
(EPSI),
which
was
confirmed
by
using
molybdenum
(MoP)
supported
on
nitrogen-phosphorus
codoped
carbon
(NPC)
as
model
catalyst
(MoP@NPC).
Such
strong
EPSI
could
not
only
stabilize
MoP
low-oxidation
state
under
environmental
conditions
but
also
its
structure,
leading
reduced
dissociation
energy
the
oxygen-containing
intermediates
enhancing
catalytic
activity
for
oxidative
desulfurization.
The
removal
dibenzothiophene
over
MoP@NPC
high
100%
with
turnover
frequency
(TOF)
value
0.0027
s-1,
33
times
higher
than
without
EPSI.
This
work
will
open
new
avenues
development
high-performance
Environmental Science & Technology,
Год журнала:
2024,
Номер
58(33), С. 14895 - 14905
Опубликована: Авг. 8, 2024
Breaking
the
activity-selectivity
trade-off
has
been
a
long-standing
challenge
in
catalysis.
Here,
we
proposed
nanoheterostructure
engineering
strategy
to
overcome
metal
phosphide
catalysts
for
oxidative
desulfurization
(ODS)
of
fuels.
Experimental
and
theoretical
results
demonstrated
that
electron
delocalization
was
key
driver
simultaneously
achieve
high
activity
selectivity
molybdenum
(MoP)/tungsten
(WP)
catalyst.
The
not
only
promoted
catalytic
pathway
transition
from
predominant
radicals
singlet
oxygens
H
