2.G.4(d) - Mobile Lubricant Use

Last updated on 12 Feb 2020 07:17 (cf. Authors)

Short description

Under NFR 2.G.4(d) - Other product use: Mobile use of lubricants, the German air pollutant emisisons inventory includes emissions from the unintentional co-incineration of lubricants in mobile sources.

In contrast, emissions from the stationary use of lubricants are reported in NFR 2.D.3.i - Other Solvent Use here.

NFR-Code Name of Category Method AD EF Key Category 1
2.G(d) Other Product use: Mobile use of Lubricants T2 M D see superordinate chapter

Method

Activity data

Basically, the amounts of lubricants unintentionally co-incinerated in engines other than 2-strokes is estimated from the annual amounts of fuels used in these engines, excluding the amounts of fuels used for international aviation and navigation.

Here, the majority of lubricant co-incineration takes place in road vehicles. These related amounts of co-incinerated lubricants are calculated directly within TREMOD [1].

Table 1: Annual amounts of lubricants co-incinerated in mobile vehicles and machinery - excluding 2-stroke engines, in terajoules
1990 1995 2000 2005 2010 2011 2012 2013 2014 2015 2016 2017 2018
1.A.2.g vii 47.30 44.40 42.29 33.61 37.15 38.39 37.93 39.36 41.34 42.52 44.01 45.17 41.98
1.A.3.a - LTO 3.12 3.08 3.30 3.05 3.04 3.08 2.93 2.65 2.76 2.79 2.79 2.70 2.72
1.A.3.b 1,174.69 1,418.72 1,561.50 1,604.16 1,653.97 1,681.03 1,682.53 1,696.70 1,722.89 1,754.07 1,779.96 1,802.45 1,814.00
1.A.3.c 19.23 15.53 12.71 9.27 7.79 7.85 7.20 7.28 6.51 7.02 7.25 5.97 5.80
1.A.3.d ii 72.49 56.84 40.84 39.05 34.48 35.51 35.58 35.77 37.92 35.29 36.95 34.39 34.95
1.A.4.a ii 10.56 9.86 10.58 10.87 12.05 12.17 12.01 12.17 12.42 12.72 13.00 13.21 12.67
1.A.4.c ii (i) 54.14 45.67 44.51 41.90 47.98 48.93 47.99 49.48 51.63 54.19 56.53 58.24 54.55
1.A.4.c ii (ii) 2.67 1.31 1.95 2.22 2.52 2.65 2.41 2.51 2.66 2.85 2.78 2.93 2.76
1.A.4.c iii 1.10 0.85 0.82 0.76 0.75 0.70 0.68 0.68 0.74 0.85 1.69 1.82 3.69
1.A.5.b i 22.56 12.00 2.05 5.16 1.58 0.99 1.55 1.08 1.09 0.92 0.91 0.66 0.44
1.A.5.b ii 3.84 1.61 0.99 0.22 0.33 0.41 0.12 0.20 0.31 0.37 0.38 0.15 0.10
1.A.5.b iii 1.47 1.00 0.84 0.63 0.55 0.53 0.50 0.48 0.53 0.43 0.56 0.75 0.65
Ʃ 1,413.17 1,610.88 1,722.37 1,750.92 1,802.19 1,832.23 1,831.43 1,848.37 1,880.80 1,914.02 1,946.81 1,968.46 1,974.31

source: own estimations and TREMOD [1]

The emission factors are derived from [2], chapter 1.A.3.b.i, 1.A.3.b.ii, 1.A.3.b.iii, 1.A.3.b.iv Passenger cars, light commercial trucks, heavy-duty vehicles including buses and motor cycles:

EMEP-EEA-2016_EF%28HM%29_lubricants_1.A.3.b.JPG

These default EF in [ppm HM /wt lubricant] have been transferred into [g HM/kg lubricant] via a NCV of 0.03985 GJ/kg into the following values:

Table 2: tier1 emission factors for heavy-metal emissions from co-incinerated lubricants, in g/TJ
As Cd Cr Cu Hg Ni Pb Se Zn
0.00 114 482 19,523 0.00 800 0.81 114 11,297

Discussion of emission trends

With default emission factors applied, emissions' trends depend solely on the amounts of unintentionally co-incinerated lubricants (see Table 1).

Table 3: Annual heavy-metal emissions from co-incinerated lubricants, in metric tonnes
1990 1995 2000 2005 2010 2011 2012 2013 2014 2015 2016 2017 2018
As 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
Cd 0.162 0.184 0.196 0.200 0.205 0.209 0.209 0.210 0.215 0.219 0.224 0.227 0.201
Cr 0.682 0.774 0.824 0.842 0.863 0.879 0.878 0.886 0.904 0.923 0.942 0.954 0.847
Cu 27.6 31.3 33.4 34.1 35.0 35.6 35.6 35.9 36.6 37.4 38.2 38.7 34.3
Hg 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Ni 1.13 1.28 1.37 1.40 1.43 1.46 1.46 1.47 1.50 1.53 1.57 1.58 1.41
Pb 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.002 0.002 0.002 0.002 0.001
Se 0.161 0.183 0.195 0.199 0.204 0.208 0.208 0.209 0.214 0.218 0.223 0.226 0.200
Zn 16.0 18.1 19.3 19.7 20.2 20.6 20.6 20.8 21.2 21.6 22.1 22.4 19.9

Recalculations

Activity data (annual amounts of unintentionally co-incinerated lubricants) have been revised slightly for the entire time series.
Here, for 2017 only, larger changes occur due to the finalisation of this year's National Energy Balance.

Table: Revised annual amounts of unintentionally co-incinerated lubricants, in terajoule
1990 1995 2000 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Submission 2020 1,413 1,611 1,722 1,751 1,760 1,782 1,776 1,788 1,802 1,832 1,831 1,848 1,881 1,914 1,947 1,968
Submission 2019 1,415 1,606 1,710 1,747 1,755 1,769 1,762 1,776 1,791 1,824 1,822 1,838 1,877 1,915 1,956 1,980
absolute change -1 5 12 4 5 14 14 12 11 8 9 10 4 -1 -9 -12
relative change -0.10% 0.33% 0.73% 0.24% 0.28% 0.78% 0.79% 0.69% 0.61% 0.44% 0.51% 0.54% 0.19% -0.04% -0.47% -0.59%
thereof: 1.A.3.b
Submission 2020 1,175 1,419 1,561 1,604 1,617 1,636 1,630 1,637 1,654 1,681 1,683 1,697 1,723 1,754 1,780 1,802
Submission 2018 1,176 1,413 1,549 1,600 1,612 1,623 1,616 1,625 1,643 1,673 1,673 1,687 1,719 1,755 1,789 1,812
absolute change -1 5 13 4 5 14 14 12 11 8 9 10 4 -1 -9 -10
relative change -0.13% 0.37% 0.81% 0.27% 0.32% 0.85% 0.87% 0.77% 0.67% 0.49% 0.56% 0.59% 0.21% -0.03% -0.50% -0.53%

On the other hand, the tier1 emission factors applied so far, remain unrevised compared to last year's submission.

Therefore, the canges in the emission estimates reported for this sub-category result solely from the named revisions in activity data.

For specific information on recalculated emission estimates for Base Year and 2017, please see the pollutant specific recalculation tables following chapter 8.1 - Recalculations.

Planned improvements

Although there are no improvements planned for this specific sub-category, several routine model revisions are scheduled for mobile sources with impact on fuel consumption data and, hence, the amounts of unintentionally co-incinerated lubricants.


Bibliography
1. Knörr et al. (2019a): Knörr, W., Heidt, C., Gores, S., & Bergk, F.: ifeu Institute for Energy and Environmental Research (Institut für Energie- und Umweltforschung Heidelberg gGmbH, ifeu): Fortschreibung des Daten- und Rechenmodells: Energieverbrauch und Schadstoffemissionen des motorisierten Verkehrs in Deutschland 1960-2035, sowie TREMOD, im Auftrag des Umweltbundesamtes, Heidelberg & Berlin, 2019.
2. EMEP/EEA air pollutant emission inventory guidebook 2019, Copenhagen, 2019.
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