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Characterisation Method Information
Characterisation Method Name:
H2S impact on NEX
Version:
1999
Date Completed:
1999
Principal Method Name:
EPS: equivalency method using SO2 as a reference
Method Description:
NEX is Normalised EXtinction of species.

Model

The characterisation factor is determined by an equivalency method using SO2 as a reference.

Equivalency factor

It is assumed that almost all hydrogen sulphide is oxidised to SO2 in the atmosphere. Therefore 1 kg of H2S is equal to 1.49 kg SO2.

Calculation of characterisation factor

The characterisation factor for SO2 was estimated in "SO2 impact on NEX" to -2.94E-13 NEX per kg SO2. The characterisation factor for H2S is therefore 1.49*(-2.94E-13 ) = -4.38E-13 NEX per kg SO2 per kg H2S.
Literature Reference:
Steen B (1999b): A systematic approach to environmental priority strategies in product development (EPS). Version 2000 Models and data of the default method CPM report Chalmers University of Technology Sweden
Methodological Range:
The system is global and the time period is 1990.
Notes:

Existing Characterisation Factors of H2S impact on NEX
Characterisation Parameter Category Indicator Impact Indication Principle Aspect Substance Quantity Unit Notes
CFactor NEX EPS/2000
Type = Emission
Direction = Output
Media = Air
Geography = *
H2S -4.38E-13 NEX/kg