The
objective
of
this
study
was
to
understand
the
synergistic
effect
SO2
emission
reduction
during
combustion
biomass-coal
blends
in
comparison
pure
coal
by
recording
gaseous
concentrations,
analyzing
composition
ash
energy
dispersive
X-ray
spectroscopy
(EDS)
and
diffraction
(XRD),
simulating
verifying
sulfur
kinetics
a
thermodynamic
equilibrium
software
(FactSage).
In
Set
A
experiments,
five
steam-exploded
biomass
(100/0,
75/25,
50/50,
25/75,
0/100
percentages
mass)
were
co-fired
1.5
MWth
pilot
scale
combustor.
B,
(100/0)
an
85/15
percent
mass
blend
torrefied
471
MWe
utility
boiler.
Biomass
contained
higher
amounts
alkali
alkaline
earth
metals
lower
compared
coal.
For
tests,
FactSage
predicted,
analysis
confirmed
that
calcium
primarily
responsible
for
all
blends,
except
biomass,
where
potassium
responsible.
reduced
up
26.3%
which
addition
due
dilution
effect.
During
combustion,
41.1%
system
absorbed
ash,
97.0%
testing.
B
coal-biomass
blend,
showed
22.1%
lime
slurry
flow
rate
at
flue
gas
desulfurization
(FGD)
towers
coal,
is
equivalent
saving
7.4
liters
per
MWe-hour.
results
suggest
blending
woody
with
can
help
coal-fired
boilers
meeting
environmental
standards
reduce
costs.
The
slag
mobility
is
a
key
factor
influencing
the
tapping
process
during
slagging
gasification
of
biomass.
However,
viscosity
model
suitable
for
biomass
(relevant
to
SiO2-CaO-K2O
system)
has
not
been
reported
yet.
This
study
firstly
proposed
an
Arrhenius-type
based
on
bond
distribution
in
slag.
information
was
determined
by
thermodynamic
modelling.
quantified
relation
between
composition
(SiO2,
K2O,
and
CaO)
(Si-Si-O-O,
Si-K-O-O,
Si-Ca-O-O),
activation
energy
viscous
flow
(Ea)
or
pre-exponential
(A)
were
established,
respectively.
newly
built
shows
excellent
prediction
performance
range
0-100
Pa⋅s
with
R2
0.91
standard
error
1.71
Pa⋅s.
The
objective
of
this
study
was
to
understand
the
synergistic
effect
SO2
emission
reduction
during
combustion
biomass-coal
blends
in
comparison
pure
coal
by
recording
gaseous
concentrations,
analyzing
composition
ash
energy
dispersive
X-ray
spectroscopy
(EDS)
and
diffraction
(XRD),
simulating
verifying
sulfur
kinetics
a
thermodynamic
equilibrium
software
(FactSage).
In
Set
A
experiments,
five
steam-exploded
biomass
(100/0,
75/25,
50/50,
25/75,
0/100
percentages
mass)
were
co-fired
1.5
MWth
pilot
scale
combustor.
B,
(100/0)
an
85/15
percent
mass
blend
torrefied
471
MWe
utility
boiler.
Biomass
contained
higher
amounts
alkali
alkaline
earth
metals
lower
compared
coal.
For
tests,
FactSage
predicted,
analysis
confirmed
that
calcium
primarily
responsible
for
all
blends,
except
biomass,
where
potassium
responsible.
reduced
up
26.3%
which
addition
due
dilution
effect.
During
combustion,
41.1%
system
absorbed
ash,
97.0%
testing.
B
coal-biomass
blend,
showed
22.1%
lime
slurry
flow
rate
at
flue
gas
desulfurization
(FGD)
towers
coal,
is
equivalent
saving
7.4
liters
per
MWe-hour.
results
suggest
blending
woody
with
can
help
coal-fired
boilers
meeting
environmental
standards
reduce
costs.
