PERFORMANCE INDICATORS OF A SOLID-OXIDE FUEL CELL IN A HYDROGEN-SULPHIDE ENERGY TECHNOLOGY PLANT

Mykhaylo Tkach, Boris Tymoshevskyi, Oleksandr Mytrofanov, Arkadіі Proskurin

Abstract


The subject of the study is the energy conversion processes of hydrogen obtained through the thermochemical decomposition of hydrogen sulfide in a solid oxide fuel cell integrated into an energy-technological system for the extraction and processing of hydrogen sulfide from the depths of the Black Sea. The aim of this work is to evaluate the efficiency of using a solid oxide fuel cell for electricity generation within a hydrogen sulfide-based energy-technological system and to determine its main performance indicators as a function of the parameters of the hydrogen sulfide decomposition process. The study employs mathematical modeling methods for physicochemical and electrochemical processes. The solid oxide fuel cell model is based on mass and energy balance equations, the Nernst equation for determining the electromotive force, as well as relationships used to estimate ohmic, activation, and concentration voltage losses. The system's operating parameters were calculated for different hydrogen sulfide conversion rates in the thermochemical reactor. The relationships between hydrogen and sulfur production rates and the degree of hydrogen sulfide decomposition were determined. The oxidant demand required to ensure stable operation of the solid oxide fuel cell was established. The current–voltage characteristic of the fuel cell was obtained at an operating temperature of 1023 K and a pressure of 111,457.5 Pa. The calculations showed that under conditions of complete hydrogen sulfide conversion, the maximum hydrogen production rate reaches 3.775 kg/h, providing electrical power generation of up to 92.4 kW. The thermodynamic efficiency of the energy conversion process was found to reach 0.725. The conducted study confirmed the feasibility of using solid oxide fuel cells as part of energy-technological systems for hydrogen sulfide extraction and processing. The results demonstrate the potential to efficiently utilize hydrogen generated during hydrogen sulfide decomposition for high-energy-efficiency electricity production. For the first time, the relationships between electrical power output, the main operating parameters of the solid oxide fuel cell, and the hydrogen sulfide conversion rate in the decomposition reactor were determined for the considered system

Keywords


hydrogen sulphide; hydrogen; solid oxide fuel cell; thermochemical reactor; hydrogen sulphide energy technolo-gy plant

References


Mykhailiuk, O. L. Perspektyvy vykorystannia en-erhetychnoho potentsialu sirkovodniu Chornoho moria [Prospects for the use of the energy potential of the Black Sea hydrogen sulfide]. Naukovyi visnyk ONEU, 2012, no. 21(173), pp. 91–100.

Tkach, M. R., Tymoshevskyi, B. H., Prosku-rin, A. Yu., Halynkin, Yu. M. Sposib vydobuvan-nia sirkovodniu z hlybynnykh vod Chornoho mo-ria [Method for extraction of hydrogen sulfide from deep waters of the Black Sea]. Patent Ukr, № 140551, 2020.

Ramadhani, F., Hussain, M. A., Mokhlis, H. A comprehensive review and technical guideline for optimal design and operations of fuel cell-based cogeneration systems. Processes, 2019. 27 p.

Van Biert, L., Godjevac, M., Visser, K., Aravind, P. A review of fuel cell systems for maritime applications. Journal of Power Sources, 2016, vol. 327, pp. 345–364.

Marino, F., Ferrario, A. M., Santoni, F., Alfano, A., Noponen, M., Neubauer, R., Cigolotti, V., Jannel-li, E. Performance evaluation of an anode-supported SOFC ShortStack operating with different fuel blends as stationary-CHP system. Journal of The Electrochemical Society, 2024, vol. 171. 13 p.

Stambouli, A. B., Traversa, E. Solid oxide fuel cells (SOFCs): a review of an environmentally clean and efficient source of energy. Renewable and Sustainable Energy Reviews, 2002, vol. 6, pp. 433–455.

Ferguson, J. R., Fiard, J. M., Herbin, R. Three-dimensional numerical simulation for various geometries of solid oxide fuel cells. Journal of Power Sources, 1996, vol. 58, pp. 109–122.

Ahmed, S., McPheeters, C., Kumar, R. Thermal-hydraulic model of a monolithic solid oxide fuel cell. Journal of The Electrochemical Society, 1991, vol. 138, pp. 2712–2718.

Neophytides, S. G. The reversed flow operation of a crossflow solid oxide fuel cell monolith. Chemical Engineering Science, 1999, vol. 54, pp. 4603–4613.

Nagata, S., Momma, A., Kato, T., Kasuga, Y. Numerical analysis of output characteristics of tubular SOFC with internal reformer. Journal of Power Sources, 2001, vol. 101, pp. 60–71.

Iwata, M., Hikosaka, T., Morita, M., Iwanari, T., Ito, K., Onda, K., Esaki, Y., Sakaki, Y., Nagata, S. Performance analysis of planar-type unit SOFC considering current and temperature distributions. Solid State Ionics, 2000, vol. 132, pp. 297–308.

Recknagle, K. P., Williford, R. E., Chick, L. A., Rec-tor, D. R., Khaleel, M. A. Three-dimensional thermo-fluid electrochemical modeling of planar SOFC stacks. Journal of Power Sources, 2003, vol. 113, pp. 109–114.

Aguiar, P., Chadwick, D., Kershenbaum, L. Modeling of an indirect internal reforming solid oxide fuel cell. Chemical Engineering Science, 2002, vol. 57, pp. 1665–1677.

Bessette, N.F. II, Wepfer, W.J., Winnick, J. A mathematical model of a solid oxide fuel cell. Journal of The Electrochemical Society, 1995, vol. 142, pp. 3792–3800.

Aguiar, P., Adjiman, C. S., Brandon, N. P. Anode-supported intermediate temperature direct internal reforming solid oxide fuel cell. I: model-based steady-state performance. Journal of Power Sources, 2004, vol. 138, pp. 120–136.

Li, C., Wang, Z., Li, C., Xu, S., Wang, S., Wang, C., Ji, Y., Qin, J., Wei, L. Optimization design of marine solid oxide fuel cell/internal combustion engine hybrid power system considering degradation. Journal of Power Sources, 2024, vol. 617, article 235180, pp. 1–11. DOI: https://doi.org/10.1016/j.jpowsour.2024.235180.

Padinjarethil, A.K., Bianchi, F.R., Bosio, B., Hagen, A. Electrochemical Characterization and Modelling of Anode and Electrolyte Supported Solid Oxide Fuel Cells. Frontiers in Energy Research, 2021, vol. 9, pp. 1–19. DOI: https://doi.org/10.3389/fenrg.2021.668964.

Petruzzi, L., Cocchi, S., Fineschi, F. A global thermo-electrochemical model for SOFC systems design and engineering. Journal of Power Sources, 2003, vol. 118, pp. 96–107.

Chan, S. H., Khor, K. A., Xia, Z. T. A complete polarization model of a solid oxide fuel cell and its sensitivity to the change of cell component thickness. Journal of Power Sources, 2001, vol. 93, pp. 130–140.

Kim, J., Virkar, A. V., Fung, K., Mehta, K., Singhal, S. C. Polarization effects in intermediate temperature anode-supported solid oxide fuel cells. Journal of The Electrochemical Society, 1999, vol. 146, pp. 69–78.

Virkar, A. V., Chen, J., Tanner, C. W., Kim, J. The role of electrode microstructure on activation and concentration polarizations in solid oxide fuel cells. Solid State Ionics, 2000, vol. 131, pp. 189–198.




DOI: https://doi.org/10.32620/aktt.2026.4sup1.13