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Title: Hydrogen production from H2S decomposition in micro-structured proton-conducting solid oxide membrane reactors
Acronym: H2S-PROTON



Energy is crucial for sustainable development. While demand is increasing and energy is mainly based on non-RES, this situation has led to socio-economic and environmental implications. Therefore, an approach based on clean energy sources has to be adopted. Hydrogen has the potential to become the future energy “currency”. H2S that is abundantly found in Black Sea waters can be considered as an important H2 source. Black Sea is unique because 90% of its water is anaerobic and contains H2S. H2S content increases steadily with depth to 0.36 mmol/l at 1000 m, 0.38 mmol/l at 2000 m, and reaches 0.60 mmol/l at the bottom. Apart from the harmful effects to human health and ecosystems, the H2S in the Black Sea may serve as a future energy source. From theoretical calculations, it has been found that it will be possible to produce 270 Mio. tons of H2 (3.83•1019 J thermal or 8.97•1015 Wh electrical energy), corresponding to 808 Mio. tons of gasoline or 766 Mio. tons of natural gas. As a consequence, if H2 is produced from H2S in the Black Sea, the energy demand of the regional countries can be partially compensated and surplus H2 fuel can be transported to Europe.
Hydrogen production from Black Sea consists of the following steps: a) pumping of sea water at ~1000m depth, b) extraction of concentrated H2S/H2O mixtures, c) decomposition of H2S to H2 and S. The decomposition of H2S to H2 can be achieved using various technologies categorized as thermal, thermochemical, electrochemical, photochemical and plasmochemical methods. Both thermal and thermochemical processes require high temperatures (1000-1200 K). The plasma and photochemical methods are presently in an early stage of development. Therefore, the electrochemical process, which operates at intermediate temperatures (700-1000 K), is seen as the most promising approach.
The H2S-PROTON project addresses the priority “Hydrogen production from H2S rich Black Sea Water”, aiming to develop a micro-structured proton conducting electrochemical membrane reactor that will enable the efficient exploitation of Black Sea’s water for H2 production. This approach has the potential to deliver substantial quantities of H2 to regional countries, helping them to take part in the forthcoming “H2 economy”.

Thematic Field: Hydrogen production from H2S rich Black Sea Water

Start and end date
Start Date: 01 February 2012
End Date: 31 January 2015



                                         CPERI / CERTH                YTU                    KIT / IMVT

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Prof. Giorgos Marnellos

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