The moisture was determined by a

Fig. 1. Exemplary samples of test materials (the origin of the coal: experimental mine “Barbara”).Figure optionsDownload full-size imageDownload as PowerPoint slide
The electrical conductivity of the eluate samples was measured according to PN-EN 27888 (1999) using a PHM 240 conductivity meter by Radiometer (Copenhagen, Denmark). The LDE225 was measured potentiometrically, using a CDM pH meter 83 (Radiometer, Copenhagen, Denmark) in accordance with PN-C-04540/01 (1990). The contents of metals and non-metals (Sb, As, B, Cr, Zn, Al, Cd, Co, Mn, Cu, Mo, Ni, Pb, Se, Ti, and Fe) in the eluate were determined by plasma emission spectrometry (ICP–OES) according to PN-EN ISO 11885 (2009) using an Optima 5300 DV by Perkin Elmer (Waltham, MA, USA). The mercury content was determined by atomic absorption spectrometry with cold vapour generation (CV-AAS) according to our own developed procedure using an SMS 100 (Perkin Elmer, Waltham, MA, USA).
3. Results and discussion
3.1. Behaviour of the metals during gasification and combustion