1.A.1.b - Petroleum Refining

Short description

Source catagory Petroleum Refining (1.A.1.b) comprises both refinery heating plants and electricity and heat production of refinery power plants.

NFR Code Method AD EF
1.A.1.b T2 NS CS

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Method(s) applied
D Default
T1 Tier 1 / Simple Methodology *
T2 Tier 2*
T3 Tier 3 / Detailed Methodology *
C CORINAIR
CS Country Specific
M Model
* as described in the EMEP/EEA Emission Inventory Guidebook - 2019, in category chapters.
(source for) Activity Data
NS National Statistics
RS Regional Statistics
IS International Statistics
PS Plant Specific
As Associations, business organisations
Q specific Questionnaires (or surveys)
M Model / Modelled
C Confidential
(source for) Emission Factors
D Default (EMEP Guidebook)
CS Country Specific
PS Plant Specific
M Model / Modelled
C Confidential

NOx NMVOC SO2 NH3 PM2.5 PM10 TSP BC CO Pb Cd Hg As Cr Cu Ni Se Zn PCDD/F B(a)P B(b)F B(k)F I(x)P PAH1-4 HCB PCBs
-/- -/- L/- -/- -/- -/- -/- -/- -/- -/- L/- -/- -/- -/- -/- -/- -/- -/- -/- -/- IE IE IE -/- -/- -/-

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L/- key source by Level only
-/T key source by Trend only
L/T key source by both Level and Trend
-/- no key source for this pollutant
IE emission of specific pollutant Included Elsewhere (i.e. in another category)
NE emission of specific pollutant Not Estimated (yet)
NA specific pollutant not emitted from this source or activity = Not Applicable
* no analysis done

Methodology

Refinery processes are very complex. Therefore the development of an adequate calculation method is demanding. Since plant specific data are not complete and partly contradictory, a plant specific reporting is not possible. Data is used to determine fuel specific emission factors as general basis of the calculation model. However, in reality, a large number of fuels and waste fuels with different fuel characteristics is used for combustion processes. Insofar the calculation model is limited. Only some refinery power plants use wet desulfurisation in order to decrease sulfur emissions. Usually the fuels mix ensures the compliance with the limit values.

Activity data

Fuel inputs for electricity production in refinery power stations are included in Energy Balance line 12 (“Industrial power stations (only for electricity)”). Energy Balance line 38 (“Refineries”) shows the energy consumption (for heat production) of refineries 1).

Fuel inputs for heat production in refinery power plants and for bottom heating in refinery processes, are derived from these figures. Activity rates for refineries for fuel inputs for electricity and heat production in petroleum refining are determined by combining the national statistics of the Federal statistical Office (DESTATIS) and the Federal Office of Economics and Export Control (BAFA).

Energy inputs in facilities for used-oil processing are reported under 1.A.1.c - Manufacture Of Solid Fuels And Other Energy Industries sector.

Emission factors

The emission factors for refinery power plants have been taken from the research project “Determination and evaluation of emission factors for combustion systems in Germany for the years 1995, 2000 and 2010” (Rentz et al 2002)2). A detailed description of the procedure is presented in Chapter: 1.A.1.a - Public Electricity And Heat Production.

Emission factors are available for different fuel types and combustion technologies. The distinction between refinery power plants and bottom heating in refinery processes is necessary since bottom heating systems have considerably higher specific emissions. Results of a project which has to evaluate data from emission declarations for the years 2004, 2008, 2012 and 2016 for all refineries will provide refinery gas emission factor data. The first results show the following range:

Table 1: Range of emission factors, in kg/TJ

Range
SO2 4.79 - 16.09
CO 1.02 - 1.85
NOX 36.71 - 45.60
NMVOC 0.843 - 1.170
TSP 0.24 - 0.37

Before the new emission factors can be used, it has to be checked which data are representative. Further quality checks are necessary in order to reproduce the trend correctly.

Trend discussion for Key Sources

The following diagram gives an overview of the fuel consumption in the refinery sector.

Since 1990, fuel consumption has shown a slightly increasing trend overall. While some relevant installations have been decommissioned since 1990 - especially in the territory of the former GDR - production increased nevertheless. And while installation efficiencies were improved, increased production of lighter petroleum products and intensified hydrosulphurisation, which led to increases in specific fuel consumptions. Annual fluctuations of all fuel types can be explained as the result of differences in production quantities. The maximum production of petroleum products to date, totalling 123.6 million t, occurred in 2005, as a result of a shortfall in capacity in the USA, which led to an increase in imports. Thereafter, production decreased by reducing excess capacities like everywhere in Europe. The increasing use of natural gas in recent years led to decreasing emissions of all emissions (except NOx ).

Recalculations

For the purpose of improving the data quality National Energy Balances for the years 2003 to 2021 have gone under revisions through fine-tuning of the computational models, consideration of new statistics or re-allocation of activity data, along with other revision mechanisms. These updates led to re-calculations in fuel uses in different sub-categories and in their corresponding emissions.

For pollutant-specific information on recalculated emission estimates for Base Year and 2021, please see the recalculation tables following chapter 8.1 - Recalculations.

Planned improvements

It is planned to revise emission factors for all pollutants on the basis of the above mentioned project.


1) AGEB, 2024: National energy balance and Satellite balance for renewable energy: https://ag-energiebilanzen.de/en/data-and-facts/energy-balance-2000-to-2030/
2) Rentz et al., 2002: Rentz, O. ; Karl, U. ; Peter, H.: Ermittlung und Evaluierung von Emissionsfaktoren für Feuerungsanlagen in Deutschland für die Jahre 1995, 2000 und 2010: Forschungsbericht 299 43 142; Forschungsvorhaben im Auftrag des Umweltbundesamt; Endbericht; Karlsruhe: Deutsch-Französisches Inst. f. Umweltforschung, Univ. (TH); 2002