2.B.6 - Titanium Dioxide Production

In NFR 2.B.6, SO₂,CO, NO_x and TSP emissions from the production of titanium dioxide are reported.

There are two kinds of processes for the production of titanium dioxide: chloride process and sulfate process. The total production amount of these two processes is attained from the German Federal Statistical Office¹⁾.

For the calculation of individual production from each process, the fraction of chloride process is determined based on the estimated total production capacity in Germany (480 kt/y) and the production capacity via chloride process (165 kt/y) ²⁾³⁾.

Emission factors for titanium dioxide production are the tier2 emission factors from EMEP/EEA Guidebook: NO_x, CO, and TSP are provided for the chloride process, while for the sulfate process only factors for NO_x and TSP are available.

The applied tier2 emission factors are listed in Table 1 ⁴⁾.

Table 1: tier2 emission factors for titanium dioxide production, in [kg/t]

The Titanium Dioxide Manufacturers Association (TDMA) reports the sum of SO₂ emissions from both processes directly to the UBA.

Since submission 2022, these emissions are no longer confidential and were therefore re-allocated from 2.B.10. Besides, CO, NO_x and TSP emissions are reported since submission 2022.

Except for SO₂, emissions of the mentioned pollutants are calculated through the multiplication of activity data and corresponding emission factors.

As all emission factors are constant over time, the emission trend is influenced only by the fluctuations of the production.

For SO₂ emissions from the production of titanium dioxide and sulphuric acid, estimates reported for the second to last year of the time series are routinely actualised by the producers. Furthermore, final emissions for the last year of the time series are not yet available at the time the inventory is compiled. Therefore, the values reported here represent a prediction and are updated with each new submission as well.

Otherwise, SO₂ emissions for 1990 und 1991 have been updated compared to last year's submission. As long as the values ​​for 1990 and 1991 were considered confidential, assumptions were made to resolve the confidentiality. As the confidentiality has been lifted, these can be replaced with the correct values.