Simple Output Method (B1) - Standard Calcination EF

B1 is the simple output method for determining the CO2 emission from the calcination of raw materials. The method is based on clinker production, CKD and bypass dust leaving the kiln system and one standard CO2 emission factor for the calcination CO2 referenced to clinker (Cement CO2 and Energy Protocol default = 525 kg CO2/t clinker). It has no separate calcination sheet as the other calculation methods have, but its data fields have been integrated into the plant sheet. For this reason, the simple output method is the pre-selection in line007n. Applying the detailed calcination CO2 methods B2 (output) or A2 (input) is preferable, if more detailed and sufficiently accurate data can be made available.

Figure 6: Diagram of the simple output method (B1)

Please also see the Please also see the Protocol Guidance Document (Chapter 3.4).

The relevant input lines in the Plant sheet are:

The calcination rate d of the CKD should preferably be based on plant-specific data. In the absence of such data, a default value of 0 should be used for dry process kilns because CKD is usually not or only to a negligible degree calcined in a dry process. In other processes (half dry, half-wet or wet) calcination rates can be significant. In the absence of data, a default value of 1 should be used for these kiln types. This value is conservative, i.e. it will in most cases lead to an overstatement of CKD-related emissions.

Equation 9: Calcination rate d of CKD

The calcination rate d of CKD can be determined according to the analysis of the loss on ignition (LOI) of CKD and raw meal (RM) according to the following equation:

where:

  • LOICKD = weight loss on ignition of the CKD
  • LOIRM = weight loss on ignition of the raw meal

The Protocol Guidance Document (Appendix 3) provides more detailed information on how to determine the calcination CO2 emissions and the degree of calcination d based on analysis of the CO2 content of CKD and raw meal.

line034m, line034n, line034o:

The grey colour of the input cells in the Plant sheet indicates that default values were pre-selected. These values shall be corrected by the cement company if more precise data are available

The standard calcination emission factor (EF) shall preferably be based on plant-specific data. National or regional standard values are also acceptable in the simple output method B1. In the absence of better data, a default value of 525 kg CO2/t clinker shall be used. This value is comparable to the IPCC default (510 kg CO2/t) corrected for typical MgO contents in clinker.

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