Characterization of Some Nigerian Coals for Power Generation

Table 4

Results of ash composition tests of the five coal samples.

Constituents	Samples
	Odagbo	Owukpa	Ezimo	Amansiodo	Inyi
Al2O3 (%)	25.78	27.60	20.76	29.13	19.02
CaO (%)	2.15	0.95	0.60	0.34	0.05
Cr2O3 (%)	0.03	0.03	0.02	0.04	0.01
Fe2O3 (%)	7.98	4.48	2.93	6.90	1.70
K2O (%)	0.31	0.06	1.13	1.32	0.36
MgO (%)	1.31	0.04	0.16	0.35	0.06
MnO (%)	0.41	0.03	0.04	0.05	—
Na2O (%)	0.07	0.02	0.03	0.06	0.01
P2O5 (%)	0.06	0.77	0.21	0.22	0.06
SiO2 (%)	56.81	61.64	70.92	58.94	75.92
TiO2 (%)	1.98	2.98	2.29	2.13	2.29
V2O5 (%)	0.09	0.03	0.02	0.04	0.02
ZrO2 (%)	0.10	0.13	0.11	0.07	0.15
Ba (%)	0.20	0.17	0.08	0.06	0.02
Sr (%)	0.04	0.13	0.04	0.05	0.01
SO3 (%)	1.74	—	0.28	—	—