Denmark's National Inventory Report 2005 - Submitted under the ...

4.3.2 Methodological issues
The N O emission from the production of nitric acid/fertiliser is based on measurement for 2002.
2
For the previous years the N O emission has been estimated from annual production statistics
2
from the company and an emission factor based on the measured 2002 emission (Kemira Growhow,
2004).
The CO 2 emission from the production of catalysts/fertiliser is based in information in an environmental
report from the company (Haldor Topsøe, 2004). In the environmental report the company
has estimated the amount of CO 2 from the process and the amount from the energy conversion.
For the years 1990-1995 the production as well as the CO 2 emission has been assumed to be
the same as in 1996.
4.3.3 Uncertainties and time-series consistency
The time-series are presented in Table 4.4. The applied methodology regarding N O is considered
2
to be consistent. The activity data is based on information from the specific company and the applied
emission factor has been constant from 1990 to 2001 and it is based on measurements in 2002.
The production equipment has not been changed during the period.
The consistency of the methodology applied for determination can not be assessed from the available
information as the specific company has given a general distribution of CO 2 from energy conversion
and processes.
The source-specific uncertainties for the chemical industry are presented in Section 4.7. The overall
uncertainty estimate is presented in Section 1.7.
4.3.4 QA/QC and verification
The information obtained from specific companies has been compared with default emission factors
given in the IPCC guidelines to ensure that they are plausible and in the proper order of magnitude.
The data treatment and transfer from the database to the CRF tables has been controlled as
described in the general section on quality assurance/quality control.
4.3.5 Recalculations
No source specific recalculations have been performed regarding emissions from the chemical industry.
4.3.6 Planned improvements
The applied emission factor for N O from the production of nitric acid is based on measurement
2
from one year. This factor was planned to be improved or validated. However, the production was
stopped in the middle of 2004 and therefore improvements have been given up.
The emission of CO 2 from the production of catalysts/fertilisers will be validated by further contact
to the company to get further detail on processes leading to generation of CO 2 . The production
statistics as well as emission of CO 2 will be completed for 1990-1995.
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