Table 2.

Performance evaluation of PLS models developed using 1st-derivative treated spectra of the full (i) and fingerprint (ii) regions for predicting thermal reactivity and energy content.

Constituent	Ash (%)	Fixed carbon (%)	Volatile matter (%)	HHV (MJ/kg)
LVs
(i)	3	2	2	2
(ii)	3	2	2	2
SEC
(i)	0.49	1.26	1.07	0.34
(ii)	0.6	1.35	1.03	0.38
SECV
(i)	1.07	1.6	1.31	0.53
(ii)	1.09	1.54	1.15	0.44
R 2
(i)	0.8	0.85	0.87	0.64
(ii)	0.7	0.83	0.88	0.54
RPD
(i)	0.98	1.96	2.17	1.03
(ii)	0.96	2.04	2.31	1.23