Understanding CDM Methodologies - SuSanA
Understanding CDM Methodologies - SuSanA
Understanding CDM Methodologies - SuSanA
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Baseline scenario and additionality<br />
The methodology is the only methodology that refers to another approved<br />
methodology (AM0028) for identification of the baseline scenario. AM0028<br />
is applicable for tertiary N 2<br />
O abatement only, however the baseline<br />
alternatives are the same for both secondary and tertiary abatement. Baseline<br />
scenario identification follows a step-wise approach.<br />
Financially most<br />
attractive Option<br />
to reduce N 2<br />
O<br />
Emissions and/or<br />
NO x<br />
Emissions is the<br />
Baseline Scenario<br />
In a first step, all technological options that reduce N 2<br />
O emissions as well<br />
as NO X<br />
emissions (as long as they impact N 2<br />
O emissions at the same time)<br />
need to be considered as potential baseline scenarios. A non-exclusive list of<br />
such options includes (i) the continuation of venting of all N 2<br />
O, (ii) alternative<br />
use of N 2<br />
O (e.g. recycling and use as a feedstock), (iii) installation of a (new)<br />
Non-Selective Catalytic Reduction (NSCR) unit, (iv) installation of an N 2<br />
O<br />
destruction or abatement technology (e.g. primary, secondary or tertiary)<br />
and (v) installation of a new tertiary measure that combines NO X<br />
and N 2<br />
O<br />
emission reduction.<br />
Subsequently, all baseline alternatives have to be eliminated that do<br />
not comply with the legal and regulatory requirements on N 2<br />
O and NO X<br />
emissions. If an option is in theory mandated but not enforced, nonenforcement<br />
needs to be demonstrated for the alternative to be considered a<br />
possible baseline scenario.<br />
In a third step a barrier test needs to be performed for all alternatives (e.g.<br />
investment or technological barrier).<br />
Finally, an investment analysis shall be undertaken for all remaining<br />
alternatives and the alternative which is financially most attractive is the<br />
baseline scenario.<br />
Baseline emissions<br />
Baseline Emission<br />
is Output times<br />
N 2<br />
O Emission<br />
Factor<br />
Baseline<br />
Campaign as<br />
the Basis for<br />
Emission Factor<br />
Determination<br />
As in the absence of the project the N 2<br />
O would have been vented, the N 2<br />
O<br />
emissions baseline is the amount of nitric acid produced during project<br />
operation multiplied with an N 2<br />
O emission factor per output of nitric acid.<br />
The emission factor is calculated based on measurements of N 2<br />
O emissions<br />
during a so called baseline campaign. In nitric acid manufacturing a<br />
campaign is a discrete production run which lasts from a new set of primary<br />
catalyst gauze until the gauze is decomposed and is exchanged by new<br />
gauze. The baseline campaign refers to a single full campaign at similar<br />
operating conditions as the last previous five campaigns (see monitoring<br />
section below) at which the N 2<br />
O emissions are measured. The amount of<br />
N 2<br />
O emissions over the length of the campaign is calculated according to the<br />
following formula:<br />
BE BC<br />
= VSG BC<br />
x NCSG BC<br />
x 10 -9 x OH BC<br />
Baseline<br />
N2O<br />
emissions<br />
Mean gas<br />
volume<br />
flow rate<br />
Mean<br />
concentration<br />
of N2O in stack<br />
gas per hour<br />
Operating<br />
hours of<br />
the baseline<br />
campaign<br />
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