2.A.1 - Cement Production

Last updated on 22 Mar 2018 15:37 (cf. Authors)

Short description

NFR-Code Name of Category Method AD EF Key Category 1
2.A.1 Cement Production T1 AS CS T: PM2.5 | L: Hg

The remarks below refer to production of cement clinkers and clinker grinding (only relevant as a source for particulate matter). The clinker-burning with intensive use of energy emits climate-relevant gases. CO2 accounts for the great majority of these emissions, but heavy metals are important too. Information about the key source relevance can be found in 2.A Mineral Industry.

Method

Activity data

Activity data are determined via summation of figures for individual plants (until 1994, activity data were determined on the basis of data of the BDZ (restructuring-tip in german)). As of 1995, following optimisation of data collection within the association, activity data were compiled by the German Cement Works Association (VDZ), and by its VDZ research institute (located in Düsseldorf), via surveys of German cement works and use of BDZ figures. The data are supplemented with data for plants that are not BDZ members (in part, also VDZ estimates).

For internal reasons within the association, the data for the years from 2015 onwards is not available from the VDZ. Instead, the cement clinker specification is based on aggregated plant specific ETS-data of DEHSt. A comparison for the years 2005-2014 showed a good correlation between information of the European Emissions Trading (ETS) and the cement clinker production data of the VDZ. So, the cement clinker information from 2015 onwards is based on aggregated data of ETS. All companies are required to report production data within the framework of CO2-ETS. The EU monitoring guidelines for emissions trading specify a maximum accuracy of 2.5 %.
Furthermore CKD was taken into account. According to the VDZ, the share of bypass dust in clinker production was between 1% and 2% between 2009 and 2016. For the inclusion as an activity rate, it can be assumed that the share was 2 % from 2009 onwards, for time before only 1 %.

Emission factors

The emission factors used for emissions calculation are based on figures for individual plants and from research projects as well as from expert judgements.

In the German cement industry, dust separated from clinker burning exhaust gas is returned to the burning process. As a result, there is no need to take account of significant losses of particles via the exhaust-gas pathway. - On the other hand, particulate matter emissions occur during clinker grinding.

Table 1: Overview of applied emission factors
pollutant Name of Category EF unit Trend
NOx clinker burning 0.60 kg/t falling
SO2 clinker burning 0.26 kg/t falling
NMVOC clinker burning 0.046 kg/t constant
NH3 clinker burning 0.055 kg/t falling
Hg clinker burning 0.024 g/t falling
Pb clinker burning 0.017 g/t falling
Cd clinker burning 0.005 g/t falling
PCB clinker burning 28.0 µg/t constant
PCDD clinker burning 0.040 µg/t constant
B(a)P clinker burning 1.0 mg/t constant
PAH clinker burning 240 mg/t constant
TSP clinker grinding 0.049 kg/t falling
PM10 clinker grinding 0.044 kg/t falling
PM2.5 clinker grinding 0.041 kg/t falling

Emissions of HCB are not applicable according to a research result. The table of EF is related to two different AD sets. For purposes of the most pollutants the AD is burnt clinker. For purposes of emission estimation of PM the AD is grinded clinker (included further materials as domestic burnt clinker). NFR tables could provide only one AD (burnt clinker).

Trends in emissions

All trends in emissions correspond to trends of emission factors in table above. No rising trends are to identify.

Recalculations

Recalculations were necessary due to the extended method regarding CKD.

For pollutant-specific information on recalculated emission estimates reported for Base Year and 2015, please see the pollutant specific recalculation tables following chapter 8.1 - Recalculations.

Planned improvements

At the moment, no category-specific improvements are planned.

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