Effect of main solid biomass commodities of patula pine on biochar properties produced under gasification conditions

•Biochars (BCs) from main biomass commodities traded worldwide are characterized.•Gasification temperature of wood pellets (WP) is higher than that of chips (WCH).•High density and temperature lead to increase the gasification efficiency by ∼41 %.•As BC from WP has 367.33 m2/g and 29.25 MJ/kg, it is a suitable solid biofuel.•WP as compared to WCH is a better feedstock to co-produce producer gas and BC.