Bio-char was densified with four binders of varying content (5–20%).
The rheological characteristics of pellets were analyzed.
Starch pellets showed good hydrophobicity, but low volume density and poor mechanical strength.
NaOH pellets showed highest compressive strength and hydroscopicity among all pellets.
Lignin and Ca(OH)2 pellets exhibited more desirable characteristics for use as biofuels.