SSRN Electronic Journal,
Год журнала:
2022,
Номер
unknown
Опубликована: Янв. 1, 2022
In
this
study,
the
use
of
ultrasound
techniques
as
a
pretreatment
for
bagasse
and
municipal
sludge
was
investigated.
Through
orthogonal
experiments,
effect
frequency,
power,
reaction
time
mixing
ratio
these
four
influence
factors
on
pyrolysis
characteristics
products
were
obtained.
After
pretreatment,
C
content
sample
increased
N
decreased.
Thermogravimetric
analysis
results
indicated
that
ultrasonic
samples
only
had
one
peak,
value
DTGmax
D
increased.
range
analysis,
45
kHz
200
W
contributed
to
reduction
in
residue
mass
an
increase
D.
Py-GC/MS
hydrocarbon,
ketone,
phenol,
ether,
alcohol,
aldehyde,
acid,
ester,
furfural,
furan,
allose
nitrogen-containing
compounds
main
compositions
co-pyrolysis
sludge.
proportion
phenol
alcohol
relatively
obvious
increase.
While,
decreased
obviously.
The
acid
could
decrease
when
adding
CaO.
Lower
frequency
lower
power
beneficial
ratio.
CaO,
high
promote
formation
while
possibly
reducing
proportion.
SSRN Electronic Journal,
Год журнала:
2022,
Номер
unknown
Опубликована: Янв. 1, 2022
Carbonation
of
alkaline
industrial
by-products
has
great
potential
for
CO2
sequestration.
In
this
work,
the
carbonation
performance
fly
ash,
steel
slag
and
carbide
was
analyzed.
The
ability
to
capture
is
obviously
better
than
that
other
two
materials
due
higher
faction
calcium-based
active
substances.
Meanwhile,
a
comprehensive
characterization
three
samples
before
after
performed
using
TGA,
XRD,
SEM-EDS,
FTIR.
Results
showed
components
in
matrix
reacted
with
develop
new
carbonates.
However,
reactivity
CaO
Ca(OH)2
CaO·SiO2
2CaO·SiO2
.
Based
on
above
test
results,
effects
operating
parameters
sequestration
by
were
evaluated.
optimum
reaction
conditions
65
oC,
1.5
MPa
initial
pressure,
15
mL/g
liquid-to-ratio
200
rpm
stirring
speed.
corresponding
capacity
efficiency
610.8
gCO
2
/kg
62.04
%,
respectively.
Mechanism
analysis
demonstrated
mass
transfer
gas-liquid
interface
controlled
rate
process
initially,
while
Ca2+
solid-liquid
gradually
became
rate-determining
step
increasing
time.
SSRN Electronic Journal,
Год журнала:
2022,
Номер
unknown
Опубликована: Янв. 1, 2022
In
this
study,
the
use
of
ultrasound
techniques
as
a
pretreatment
for
bagasse
and
municipal
sludge
was
investigated.
Through
orthogonal
experiments,
effect
frequency,
power,
reaction
time
mixing
ratio
these
four
influence
factors
on
pyrolysis
characteristics
products
were
obtained.
After
pretreatment,
C
content
sample
increased
N
decreased.
Thermogravimetric
analysis
results
indicated
that
ultrasonic
samples
only
had
one
peak,
value
DTGmax
D
increased.
range
analysis,
45
kHz
200
W
contributed
to
reduction
in
residue
mass
an
increase
D.
Py-GC/MS
hydrocarbon,
ketone,
phenol,
ether,
alcohol,
aldehyde,
acid,
ester,
furfural,
furan,
allose
nitrogen-containing
compounds
main
compositions
co-pyrolysis
sludge.
proportion
phenol
alcohol
relatively
obvious
increase.
While,
decreased
obviously.
The
acid
could
decrease
when
adding
CaO.
Lower
frequency
lower
power
beneficial
ratio.
CaO,
high
promote
formation
while
possibly
reducing
proportion.
