Report - DCE - Nationalt Center for Miljø og Energi

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NMVOC emission, Mg
45
40
35
30
25
20
15
10
5
0
1990
Flaring,
offshore
1992
1994
1996
1998
2000
Flaring,
treatment and storage
2002
2004
2006
2008
Venting,
treatment and storage
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The emissions from offshore flaring are estimated from the same set of emission
factors for all years in the time series and the variations reflect only the
variations in the flared amounts. Emissions of selected components from
flaring in oil and gas extraction including offshore flaring and flaring in gas
treatment and storage facilities are shown in Table 3.56. The decrease in the
NMVOC emission from 2009 to 2010 owes to change from continuous to
regulated operation of the power producing gas turbine at the gas storage
plant.
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Besides in the offshore sector flaring also takes place in refineries. Flaring in
refineries is a significant fugitive emission source for SO2. In 1990-1993 emissions
from petroleum product processing were included in emissions from
flaring in refineries (1B2c). From 1994 the data delivery format was changed,
which made it possible to split the emissions into contributions from flaring
and processing, respectively. Emissions from processing are from 1994 included
in 1B2a iv.
Emissions for selected years and components are shown in Table 3.57. Until
1996 a third refinery was in operation in Denmark leading to larger emissions
in 1990-1996. The decreasing emissions of SO2 from 1996 to 1998 are
due to technical improvements of the sulphur recovery system at one of the
two Danish refineries. The large emissions from 2005 and onwards owe to
shut-downs due to maintenance and accidents. Further, construction and
initialisation of new facilities and problems related to the ammoniumthiosulfat
(ATS) plant has lead to increased emissions. In 2007 the capacity of the
ATS plant was increased followed by commissioning difficulties.
2010
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