The efficiency of the process of coal gasification in the presence of hydrogen Gracjana Woźniak, Rafał Longwic, Kamil Szydło, Adam Kryłowicz, Jarosław Kryłowicz and Robert Juszczak E3S Web Conf., 46 (2018) 00030 Published online: 13 September 2018 DOI: 10.1051/e3sconf/20184600030