Characteristics of Corrosion Related to Ash Deposition on Boiler Heating Surface during Cofiring of Coal and Biomass

Table 6

Content of elements in different ash.

Element	Na	Al	Si	S	Cl	K
Straw ash	0.433	7.602	10.855	2.54	13.521	21.529
Lean coal	0.612	28.169	33.481	0.837	0.412	0.262
50% straw and 50% lean coal ash	0.498	17.635	25.282	3.911	0.649	7.076