That is right for Mr Yusufu D, your question and may be for I think like this picture (below) is called TKS ( bunch of sawit) is very good for binder used in the production of biomass briquettes. You know this is the materials have a high of heating value if It is burning for energy.

High lignin Hydrothermally Carbonized biomass can be a good binder.

Typically, biomass agglomerates do not contain a binder. It's too expensive. wood pellets for instance normally rely on the heat of extrusion to melt the lignins which re-solidify on cooling. Some processes. such as puck production, rely on very high pressures and selection of an appropriate particle size distribution.