Table 1.

Properties of different biochar.

Feedstock	Production Conditions		Component, %						Reference
		C	N	O	H	S	P	K
Rice-straw	Fast pyrolysis 800 °C	36.2		39.8					[27]
Corn cob	Slow pyrolysis 600 °C	79.1	4.25					10.1	[28]
Corn stover	Slow pyrolysis 600 °C	69.8	1.01			0.181	2.461	9.95	[28]
Peanut hull	Slow pyrolysis 400 °C	65.5	2.0			0.00162	0.0015	10.0	[28]
Corn stover	Slow pyrolysis 300 °C	59.5	1.16			0.137	1.705	7.33	[28]
Corn residue (Stover and cob)	HTC 260 °C (30 min)	57.51 ± 1.11	1.62 ± 0.04	35.12 ± 1.09	0.23 ± 0.02				[29]
Rice husk + high density polyethylene	Co-pyrolysis 300 °C	46.802 ± 0.960	0.670 ± 0.003		0.036 ± 0.002				[30]