Utilisation of coal for energy production in fuel cells Magdalena Dudek, Tadeusz Olkuski, Barbara Tora, Przemysław Grzywacz and Alicja Rapacz-Kmita E3S Web Conf., 10 (2016) 00019 Published online: 17 October 2016 DOI: 10.1051/e3sconf/20161000019