Hydrogen yield with variation in S/B ratio for different biomasses.

Biomass	H2 yield (mol kg−1)	S/B ratio	Reference
Wood residue	19.06–25.40	0.5–1.0	79
Sewage sludge	15.07–14.41	1.5–2.0	80
Palm kernel shell	48.97	2.5	81
Rice husk	15.77–13.41	1.5–2.5	82
Coconut shell	38.65–42.10	1.69–3.10	83
Pine sawdust	41.18–43.04	1.05–2.53	84