Micro Fine Sized Palm Oil Fuel Ash Produced Using a Wind Tunnel Production System

Table 3

Chemical composition of each sample from EDX analysis.

Material	Silica		Calcium
	Mapping area A	Mapping area B	Mapping area A	Mapping area B
	Mass as oxide (%)	Mass as oxide (%)	Mass as oxide (%)	Mass as oxide (%)
OPC	16.24	19.40	70.11	73.69
Fly ash	45.21	48.02	—	2.33
POFA at 2 m	50.08	69.59	12.90	14.25
POFA at 4 m	23.79	31.34	4.53	10.03
POFA at 6 m	35.34	45.21	8.97	5.70
POFA at 8 m	30.31	26.82	4.57	1.52
POFA at 10 m	41.48	28.27	7.44	7.13