Total project cost
ISK 47.9 M
ISK 9.7 M
H2S is commonly emitted into the atmosphere from geothermal power plants, causing potential environmental problems. A possible H2S disposal method is injection back into the geothermal system where H2S may mineralize forming sulphides. The project “H2S sequestration into geothermal systems” aims at defining the geochemistry of geothermal H2S sequestration and its geochemical feasibility. Emphasis was placed on studying the rate of H2S mineralization, possible oxidation to sulphuric acid and together with geochemical modelling, assessing the optimal conditions of H2S disposal. The project was a joint effort between scientists that have contributed to this subject in earlier years.
Description: (A) The simulated phase relations and temperature distribution of a ~2000–4000 year old geothermal system initially with a magmatic heat source with the top at 2 km depth, of basalt composition and having temperatures of 1100°C. (B) The measured phase relations in the Krafla geothermal system expressed as Enthalpy (h) – Pressure (P) diagram for water with temperature contours.
Final report 2017
H2S sequestration process and sustainability in geothermal systems (2018); Přikryl J., Marieni C., Gudbrandsson S., Aradóttir E.S., Gunnarsson I., Stefánsson A.; Geothermics 71, 156-166, (App.5); doi.org/10.1016/j.geothermics.2017.09.010
Multiple sulfur isotope systematics of Icelandic geothermal fluids and the source and reactions of sulfur in volcanic geothermal systems on divergent plate boundaries; Stefánsson A., Keller N.S., Gunnarsson-Robin J., Ono S. (2015); Geochimica et Cosmochimica Acta, 165, 307–323.
Sulfur isotope systematics of geothermal fluids, Krafla, Iceland (2013); Keller, N.S., Stefánsson A., Ono S., Gunnarsson Robin J.; Goldschmidt Conference , Mineralogical Magazine, 1445
Towards green energy: Co-mineralization of carbon and sulfur in geothermal reservoirs (2017); Marieni C., Přikryl J., Aradóttir E.S., Gunnarsson I., Stefánsson A.; Submitted to International Journal of Greenhouse Gas Control (App.3)
Experimental study of H2S sequestration in geothermal systems; Gudbrandsson S., Stefánsson A. (2014); Report (RH-14-14).
Útfellingar brennisteins í basalti; Guðbrandsson, S., Stefánsson, A., Moola, P., Prikry, J. (2014); Science Day
H2S sequestration into geothermal systems (2013); Stefánsson A.; GEORG Geothermal Research Group, Report