Basic HTML Version
238
IBRACON Structures and Materials Journal • 2012 • vol. 5 • nº 2
Evaluation of partial clinker replacement by sugar cane bagasse ash: CO
2
emission reductions
and potential for carbon credits
through the use of ash in cementitious compounds has already
been proven by several researchers.
Brazil presents a great potential for implementation of CDM proj-
ects involving the use of SCBA and the southeastern states, such
as the state of São Paulo, concentrate the largest share of both ash
and cement productions. The use of the UNFCCC methodology for
Table 2 – Results of the hypothetical scenario 2
2
Term (scenario )
Meaning
Result
Unit
Total CO emissions in the Baseline discounted the emissions relative
2
to the grinding and preparation of additives.
0.380
t CO / t
2
cement
Total CO emissions in the Project discounted the emissions relative
2
to the grinding and preparation of additives.
0.344
Share of clinker in the cement for the Baseline.
0.80
t clinker/ t
cement
Share of clinker in the cement for the Project.
0.725
Emissions related to electricity for grinding and preparation of
additives in the Baseline.
not calculated
t CO / t
2
cement
Emissions related to electricity for grinding and preparation of
additives in the Project.
CO emissions per ton of clinker in the Baseline.
2
0.475
t CO / t
2
clinker
CO emissions per ton of clinker in the Project.
2
CO emissions per ton of clinker due to calcination of calcium and
2
magnesium carbonate in the Baseline.
0.475
t CO / t
2
clinker
CO emissions per ton of clinker due to calcination of calcium and
2
magnesium carbonate in the Project.
CO emissions per ton of clinker due to burning of fossil fuels for the
2
production of clinker in the Baseline.
0
t CO / t
2
clinker
CO emissions per ton of clinker due to burning of fossil fuels for the
2
production of clinker in the Project .
CO emissions per ton of clinker due to the use of grid electricity for
2
the production of clinker in the Baseline.
0
t CO / t
2
clinker
CO emissions per ton of clinker due to the use of grid electricity for
2
the production of clinker in the Project.
CO emissions per ton of clinker due to electricity self-generation for
2
production of clinker in the Baseline.
0
t CO / t
2
clinker
CO emissions per ton of clinker due to electricity self-generation for
2
production of clinker in the Project.
Leakage (Teodoro Sampaio and Andradina)
Average distance for inter-municipal transport.
724
0.055
km
Transport-related emissions per ton of ash in the Project.
719
0.054
t CO / t ash
2
Share of ash on the cement of the Baseline.
t ash/ t cement
Share of ash on the cement of the Project.
0
0.075
Total leakage emissions relating to the transport of ash.
–1.222
–1.349
–2.572
kt CO
2
Emissions reductions
Total annual production of cement of the scenario.
631
kt
Share of ash not surplus used in the project.
0
t of ash not
surplus/ t of
ash used
Annual reduction of CO emissions for the scenario 1.
2
19.9
kt CO
2
BASELINE AND PROJECT EMISSIONS