Table 1.

Proximate analysis and % yield of rice husk and rice husk biochar products.

Sample	Proximate analysis				% yield
	% moisture content	% volatile matter	% fixed carbon	% ash
Rice husk	10.08 ± 0.62	69.98 ± 2.85	9.85 ± 0.68	10.08 ± 0.27	—
Rice husk biochar prepared at 400°C	2.83 ± 0.31	20.13 ± 1.32	56.75 ± 0.54	20.29 ± 0.43	43.23 ± 0.10
Rice husk biochar prepared at 500°C	2.81 ± 0.57	7.36 ± 0.72	68.64 ± 2.32	21.19 ± 0.36	37.86 ± 0.11
Rice husk biochar prepared at 600°C	2.61 ± 0.52	5.85 ± 0.75	69.46 ± 2.74	22.08 ± 0.31	37.41 ± 0.38