Table 3.
Combustion characteristics of charcoal and agglomerated charcoal in a closed and ventilated condition

Sample	Condition	Ignition time (min)	Volatile matter (wt.%)	Burned material content for 30 min (%)	Residual (%)
A1	closed	12	9.4	54.7	13.2
A2		9	5.4	34.9	30.8
A3		8	39.6	60.5	12.8
B1		3	43.3	68.9	25.9
B2		3	30.3	53.7	37.2
B3		15	11.5	39.4	6.4
A1	ventilated	12	9.4	52.8	6.1
A2		9	5.4	38.4	33.8
A3		8	39.6	59.4	3.2
B1		3	43.3	67.8	11.0
B2		3	30.3	59.7	33.2
B3		15	11.5	33.3	19.8