Limitation of thermogravimetry for oxy-combustion analysis of coal chars

• DOI: 10.1007/s10973-017-6782-6
• Publication Date: 2017-11-09T03:46:52Z
• Authors: Piotr Babinski; Marek Sciazko; Ewelina Ksepko
• Keywords: Thermogravimetry; Reaction rate; Solid fuel

A kinetic study of the oxy-combustion chars obtained from two Polish steam coals was conducted. comparative focused on data analysis concerning coal collected thermobalances, which differed in construction, design crucibles, sample size and gas flow direction. The influence individual factors such as temperature, O2 concentration, dimensions crucibles char bed reaction rate analysed. On basis these results, a global model elaborated showing all factors, particularly mass transfer conditions, rates. developed can be extended to other conditions or fluidised applied fast reactions ensure they occur chemical kinetics control regime during TG tests. It concluded that gas–solid fuel contact characteristics are crucial for measured interpretation data.