2.B.6 - Titanium Dioxide Production

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

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

For the calculation of individual production of 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 Tier 2 emission factors from EMEP Guidebook: NO_x, CO, and TSP are provided for the chloride process, while only factors for NO_x and TSP are available for the sulfate process.

The applied Tier 2 emission factors are listed in Table 1 ⁴⁾.

Table 1: Tier 2 emission factors for titanium dioxide production, in [kg/t]

The association of the titanium producers reports the sum of SO₂ emissions from both processes directly to the UBA. These emissions are no longer confidential since submission 2022 und therefore are reallocated from 2.B.10 to this category since then. Besides, CO, NOₓ 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 the emission factors are constant over the time, the emission trend is influenced only by the development 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, definite emissions for the last year of the time series are not yet available at the time the inventory is compiled. Here, the reported values represent a prediction and are therefore updated with each new submission as well.

Otherwise, no recalculations have been carried out compared to last year's submission.

Since the SO_x emissions for 1990 and 1991 have so far been subject to confidentiality, 1992 emission values were adopted for these two years. As this confidentiality does no longer exist, original SO_x values for 1990 and 1991 will be published with the next annual submission.