Environmental Engineering Reference
In-Depth Information
Table 10.5. Performance analysis of different bioenergy systems (Source: Naqvi et al ., 2010c).
Parameter
BLGCC
BLG for biofuel production
Larson
Eriksson
Ekbom et al .
Andersson
Larson et al .
Naqvi
et al .
and Harvey (2003)
and Harvey (2006)
et al .
Reference
(2003)
(2004)
(2006)
(2010a)
Mixed
Product
Electricity Electricity MeOH DME
H 2
DME
alcohol CH 4
Pulp [ADT/day]
1600
2000
2000
2000
2000
1600
1600
1000
Black liquor solid 2724
3420
3420
3420
3420
2724
2724
1700
[tDS/day]
BLS flow [MW]
350.7
487
487
487
487
350.7
350.7
243.5
Purchased
27.1
21.3
129
125
123.5
77.4
89.2
106.5
biomass [MW]
Electricity
15.2
86.5
45.9
48.7
56.7
99.6
8.21
1.1
[MW]
Import/Export
[
]
Fuel production
/ +
-
-
272
275
261
168
60
240.2
[MW]
Energy content based on lower heating value (LHV) of fuels; black liquor (12.3MJ/kg), bark (19.4MJ/kg),
DME (28.8MJ/kg), methanol (21.1MJ/kg), methane (50MJ/kg), hydrogen (120MJ/kg).
Table 10.6. Pellet production using different drying technologies (Source: Andersson, 2007).
Steam dryer
Type of dryer
26 bar
10 bar
Flue gas dryer
Vacuum dryer
Pellet production [tonnes/year]
110,700
110,700
70,500
209,000
Alternate heat use
Electricity
Electricity
-
-
production
production
Heat cost a
[million Euro/year]
1.2
0.63
0
0
Dryer cost b [million Euro]
3.0
5.0
2.0
28
Specific production cost [Euro/tonne]
32.0
31.4
24.6
38.9
Payback period [year]
4.6
4.8
3.4
7.4
a Based on lost electricity generation using steam dryers
b References: Wimmerstedt and Linde (1998), Andersson et al . (2006) and Eklund (2002).
pellets. In addition, the pellet production using vacuum drying also showed high potential but at
high production cost and about 7 years of payback period.
10.5 BIOENERGY SYSTEMS AND CCS POTENTIAL
A bioenergy system in pulp mills with carbon capture and storage (CCS) is an interesting CO 2
mitigation technique, decreasing the amount of CO 2 emissions to the atmosphere and which can
also be termed as “negative CO 2 emissions”. The biomass use as an alternative to fossil fuels and
capture of CO 2 leads to long-term removal of carbon from the biogenic cycle. It is important to note
that currently the bioenergy systems integrated with CCS have not been fully commercialized.
According to the Intergovernmental Panel on Climate Change special report on renewable energy
 
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