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

5 Solvents and other product use (CRF Sector 3)
5.1 Overview of the sector
Use of solvents and other organic compounds in industrial processes and households are important
sources of evaporation of non-methane volatile hydrocarbons (NMVOC), and are related to
the source categories Paint application (CRF sector 3A), Degreasing and dry cleaning (CRF sector
3B), Chemical products, manufacture and processing (CRF sector 3C) and Other (CRF sector 3D).
In this section a new methodology for the Danish NMVOC emission inventory is presented and
the results for the period 1995 – 2003 are summarised. The method is based on a chemical approach,
and this implies that the SNAP category system is not applicable. Instead emissions will be
related to specific chemicals, products, industrial sectors and households and to the CRF sectors
mentioned before.
5.2 Paint application (CRF Sector 3A), Degreasing and dry cleaning (CRF
Sector 3B), Chemical products, Manufacture and processing (CRF
Sector 3C) and Other (CRF Sector 3D)
5.2.1 Source category description
Table 5.1 and Figure 5.1 show the emissions of chemicals from 1985 to 2003, where the used
amounts of single chemicals have been assigned to specific products and CRF sectors. The methodological
approach for finding emissions in the period 1995 - 2003 is described in the following
section. A linear extrapolation is made for the period 1985 – 1995. A decrease is seen throughout
the sectors. Table 5.2 shows the used amounts of chemicals for the same period. Table 5.1 is derived
from Table 5.2 by applying emission factors relevant to individual chemicals and production
or use activities. Table 5.3 showing the used amount of products is derived from Table 5.2, by assessing
the amount of chemicals that is comprised within products belonging to each of the four
source categories. As a first approach the conversion factors are very rough estimates, and more
thorough investigations are needed in order to quantify the used amount of products more accurately.
In Table 5.4 the emission for 2003 is split into individual chemicals. Propane and butane are main
contributors, which can be attributed to propellants in spraying cans. Turpentine is defined as a
mixture of stoddard solvent and solvent naphtha, and it is these two chemicals that are considered
in the inventory. For each chemical the emission factors are based on rough estimates from SFT
(1994). High emission factors are assumed for use of chemicals (products) and lower factors for
industrial production processes.
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