Table 2. Contents of the Alkali Metals and Alkaline Earth Metals in the Char, wt %.

experimental conditions	Ca	Na	Mg	K
850 °C	18.942	1.515	0.799	0.314
850 °C with steam	22.417	1.509	0.8	0.328
900 °C	23.537	1.489	0.754	0.318
900 °C with steam	25.778	1.315	0.742	0.251