Community Research and Development Information Service - CORDIS

Abatement and Disposal of H2 S in Geothermal Plants

The main objective of this project was to analyse the different problems associated with hydrogen sulphide (H2 S) abatement, and its subsequent disposal, in geothermal power plants. The project intended to find a range of recommended abatement technologies which could be applied across most types of geothermal sites located in Europe.

Non-condensable gases, particularly (H2S), in geothermal fluids can cause severe problems during the exploitation of geothermal energy. Non-condensable gases have to be eliminated from any steam turbine cycle, geothermal or fuel-fired, as their presence limits the condenser vacuum and so lowers efficiency. Usually they are extracted and vented to atmosphere but this cannot be done when the gases include H2 S because H2 S is toxic at the ppm level to animal life and vegetation. It is also corrosive, particularly to the copper-containing components which form an essential part of electrical switchgear. The people living around geothermal power stations can also suffer inconvenience due to the presence of noxious H2 S fumes ("bad eggs") at concentrations well below those dangerous to health. It is hoped that the development of H2S abatement equipment will lead to some geothermal fields being developed, which will create sustainable power and large savings over fossil fuels.

Reported by

Consorzio Pisa Ricerche
Piazza Alessandro d'Ancona 1 RES_OG_PCD 56127
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