Table 1.

Physicochemical properties of the biochar samples obtained at different pyrolysis temperatures.

Sample	PC300	PC400	PC500	PC600	PC700
C%	19.07	27.67	46.93	52.13	56.96
H%	4.37	3.83	3.27	3.08	2.89
N%	0.14	0.18	0.21	0.23	0.26
O%	74.17	64.56	44.95	39.81	34.91
Ash%	2.25	3.76	4.64	4.75	4.98
H/C atomic ratio	0.23	0.14	0.07	0.06	0.05
(O + N)/C atomic ratio	3.90	2.34	0.96	0.77	0.62
yield (wt%)	91.08	80.26	76.92	73.84	71.33
pHpzc	3.12	4.84	5.29	5.83	5.94
N2-BET area (m2/g)	21.583	47.745	331.291	432.737	397.864
Pore volume (cm3/g)	0.021	0.028	0.182	0.233	0.227
Pore size (nm)	3.873	2.375	2.182	2.117	2.249