TY - JOUR N2 - A modified approach to equilibrium modelling of coal gasification is presented, based on global thermodynamic analysis of both homogeneous and heterogeneous reactions occurring during a gasification process conducted in a circulating fluid bed reactor. The model is based on large-scale experiments (ca. 200 kg/h) with air used as a gasification agent and introduces empirical modifications governing the quasi-equilibrium state of two reactions: water-gas shift and Boudouard reaction. The model predicts the formation of the eight key gaseous species: CO, CO2, H2O, H2, H2S, N2, COS and CH4, volatile hydrocarbons represented by propane and benzene, tar represented by naphthalene, and char containing the five elements C, H, O, N, S and inorganic matter. L1 - http://journals.pan.pl/Content/85022/PDF/06-paper.pdf L2 - http://journals.pan.pl/Content/85022 PY - 2015 IS - No 1 March EP - 87 DO - 10.1515/cpe-2015-0006 KW - equilibrium modelling KW - coal gasification KW - gasification modelling KW - fluid bed gasification A1 - Ściążko, Marek A1 - Stępień, Leszek PB - Polish Academy of Sciences Committee of Chemical and Process Engineering DA - 2015[2015.01.01 AD - 2015.12.31 AD] T1 - A Modified Gibbs Free Energy Minimisation Model for Fluid Bed Coal Gasification SP - 73 UR - http://journals.pan.pl/dlibra/publication/edition/85022 T2 - Chemical and Process Engineering ER -