Fig. 9 SEM and EDX qualitative maps of the samples placed at the low temperature position B
(a): commercial pellet; (b): reference pellet; (c): MgO-pellet; (d): Mg(OH)2-pellet
The appearance of a specific substance will appear as white
spots and a dark surface indicates no appearance of the
substance. The elements iron, chromium and nickel in steel
are shown in the first three maps in the upper row of the EDX
mappings. If there is a high intensity of these elements it
means that the area has little ash deposit. The last two maps on
the first row and all the maps in the lower row show the ash
elements sodium (Na), potassium (K), chlorine (Cl), sulphur
(S), silicon (Si) and in the additive cases also magnesium
(Mg).