1.A.3.b v - Gasoline Evaporation

Last updated on 29 Aug 2019 09:29 (cf. Authors)

Short description

In category 1.A.3.b v - Road Transport: Gasoline evaporation fugitive emissions from evaporation of gasoline from road vehicles are reported.

NFR-Code Name of Category Method AD EF Key Category 1
1.A.3.b v Gasoline evaporation T2 NS, M CS, M L & T: NMVOC

Method

Activity data

Specific data for gasoline evaporation from road vehicles are generated within TREMOD [1].
- The following table provides an overview of annual amounts of gasoline evaported from road vehicles in Germany.

Table 1: Annual amount of gasoline evaporated from road vehicles, in kilotonnes
1990 1995 2000 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
PCs 10,923 9,694 9,171 8,108 7,630 7,324 7,094 7,059 6,949 6,881 6,566 6,647 6,703 6,624 6,407 6,369
LDVs 169 139 144 103 95 88 74 68 62 59 55 53 52 52 49 49
Mopeds 113 79 72 73 77 77 79 81 78 81 79 79 80 80 81 82
Motorcycles 78 39 93 135 141 83 92 100 106 113 118 130 139 131 132 134
Ʃ 1.A.3.b v 11,283 9,951 9,480 8,419 7,944 7,573 7,340 7,307 7,196 7,134 6,817 6,909 6,973 6,888 6,670 6,634

source: TREMOD 5.81 [1]

(Implied) Emission factors

Tier3 emission factors representing the effect of mitigation technologies are derived from TREMOD (Knörr et al., 2018a ) [1].

Table 2: Emission factors used for 2017 emissions estimates, in kg/t
Passenger cars Light duty vehicles Mopeds Motorcycles
conventional with mitigation conventional with mitigation conventional conventional with mitigation
47.8 0.86 32.7 0.51 6.49 24.7 14.3
Table 3: Overview of implied emission factors per vehcile type, in kg/t
1990 1993 1994 1995 2000 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
PCs 9.22 6.51 9.77 8.61 3.08 1.17 2.08 1.91 1.57 1.47 1.41 1.40 1.40 1.39 1.40 1.37 1.45 1.50
LDVs 14.5 12.0 20.2 18.4 10.3 6.6 12.6 11.4 8.82 7.73 6.80 6.13 5.65 5.36 5.21 4.94 5.12 5.07
Mopeds 3.27 2.92 3.22 3.16 3.32 3.30 6.48 6.71 6.71 6.95 6.89 6.71 6.64 6.70 6.64 6.56 6.55 6.49
Motorcycles 8.76 15.6 24.7 23.1 13.5 10.6 19.6 27.8 24.3 22.7 21.2 20.4 19.3 18.2 17.5 17.6 17.4 17.2

NOTE: IEFs for 1993 and 1994 as well as 2005 and 2006 show an erronous development. A correction will be scheduled for the next regular model revision.

Discussion of emission trends

NFR 1.A.3.b v - Gasoline evaporation is key category for emissions of NMVOC regarding the emissions' level and declining trend.

Non-Methane Volatile Organic Compounds - NMVOC

(fugitive emissions only; no NMVOC emissions from fuel combustion included)

Since its maximum level of over 11,000 kilotonnes in 1990, the amount of evaporated gasoline is decreasing - and so are the related NMVOC emissions. The amounts of evaporated gasoline are connected directly with those of gasoline consumed. Here, the decrease becomes sharper from 2000 onwards following a growing switch from gasoline to diesel oil especially in passenger cars. Here, the annual amounts of NMVOC emissions from evaporation not only depend directly on the amount of evaporated gasoline but also on the number of vehicles equipped with mitigation technologies. Thus, the decrease is sharpest straight after 1990 and since then slowing down.

NOTE: Due to defectively revised emission factors, the emission estimates provided in the NFR tables are incorrect until 1993. Here, the EFs for 1990 to 1993 have not been adapted to the revised values for all years as of 1994. As it is not possible to provide an artificially corretected chart for the emission estimates, the chart from submission 2014 is included to at least display the correct trend in emissions. - However, the described erronous EFs will be corrected with the next TREMOD routine revision and the NEC and CLRTAP submissions 2018.

Recalculations

Recalculations were carried out due to a TREMOD routine revision.

Activity data was revised for 2015 and 2016 only.

Table 4: Revised annual amounts of evaporated gasoline, in kilotonnes
2015 2016
Submission 2019 6,888 6,670
Submission 2018 6,688 6,472
absolute change 200 198
relative change 2.99% 3.06%

In addition, tier3 NMVOC emission factors were revised for recent years.

As a result, NMVOC emissions from gasoline evaporation were re-estimated as follows:

Table 5: Re-estimated NMVOC emissions, in kilotonnes
2015 2016
Ʃ 1.A.3.b v
Submission 2019 12.19 12.40
Submission 2018 12.19 12.43
absolute change -0.000002 -0.03
relative change -0.00002% -0.25%
Passenger Cars
Submission 2019 9.09 9.31
Submission 2018 9.09 9.32
absolute change -0.000001 -0.01
relative change -0.00002% -0.14%
Light Duty Vehicles
Submission 2019 0.26 0.25
Submission 2018 0.26 0.25
absolute change -0.0000001 -0.001
relative change -0.00003% -0.57%
Mopeds
Submission 2019 0.53 0.53
Submission 2018 0.53 0.53
absolute change -0.0000001 -0.003
relative change -0.00003% -0.57%
Motorcycles
Submission 2019 2.31 2.30
Submission 2018 2.31 2.32
absolute change -0.000001 -0.01
relative change -0.00003% -0.57%

For specific information on recalculated emission estimates for Base Year and 2016, please see the pollutant specific recalculation tables following chapter 8.1 - Recalculations.

Planned improvements

As mentioned above, the correction of erroneous emission factors will be included in the TREMOD routine revision for submission 2019.


Bibliography
1. Knörr et al. (2018a): 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 1960-2030, sowie TREMOD 5.81, im Auftrag des Umweltbundesamtes, Heidelberg & Berlin, 2018.
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