Table 1. Average proximate characteristics of torrefied Calliandra wood pellets

Torrefaction temperature (°C)	Range of torrefaction duration (min)	Compressive strength (N)	Moisture content (%)	Volatile matter (%)	Ash content (%)	Fixed carbon (%)	Calorific value (cal/g)
Control	0	738.60	10.84	85.84	1.68	12.48	4,581.40
250	30	328.70	6.21	87.56	1.29	11.15	4,591.60
	45	307.22	5.09	83.30	1.27	15.43	4,965.40
	60	265.46	4.41	78.68	1.05	20.26	5,143.60
300	30	241.43	4.41	81.98	1.35	16.68	5,102.00
	45	142.57	3.63	61.97	1.02	37.01	5,914.80
	60	130.76	3.39	61.14	0.90	37.96	6,303.80