Biomass pretreatment strategies via control of rheological behavior of biomass suspensions and reactive twin screw extrusion processing

► Flowability of biomass suspensions is key for their twin screw extrusion. ► Flowability of biomass suspensions could be manipulated via gelation agents. ► Recycled black liquor was adequate also in improving flowability. ► Pretreatment of biomass suspensions in twin screw extruder could be demonstrated. ► Advantages of extrusion include higher biomass content and lower time/temperature.