Abstract: A bio-modifier for asphalt is provided that comprises non-wood bio-char. In some embodiments, the bio-char comprises pyrolyzed biomass from a bio-fuel crop and/or comprises pyrolyzed grass. The asphalt modifier can improve the performance of asphalt compositions such as asphalt binder compositions and compositions comprising asphalt binder and aggregate. For example, the bio-modifier can improve the temperature susceptibility of asphalt binder compositions and increase the rutting resistance, moisture and cracking resistance of hot mix asphalt compositions. In addition, methods of preparing the bio-modifier composition, methods of preparing modified asphalts comprising the bio-modifier, and modified asphalt compositions are provided.

Abstract: Methods, processes and systems for using solid catalysts to simultaneously produce lactic acid and propylene glycol from glycerol are provide, as are methods, processes and systems of converting glycerol use heterogeneous catalytic agents. Different combinations of catalysts and reaction conditions provide tunable ranges for the yields of lactic acid and propylene glycol. The conversion methods, processes and systems are not reliant on external hydrogen. Applications to crude glycerol, including that co-produced during biodiesel production, are also described.

Abstract: Methods, processes and systems for using solid catalysts to simultaneously produce lactic acid and propylene glycol from glycerol are provide, as are methods, processes and systems of converting glycerol use heterogeneous catalytic agents. Different combinations of catalysts and reaction conditions provide tunable ranges for the yields of lactic acid and propylene glycol. The conversion methods, processes and systems are not reliant on external hydrogen. Applications to crude glycerol, including that co-produced during biodiesel production, are also described.

Abstract: A bio-modifier for asphalt is provided that comprises non-wood bio-char. In some embodiments, the bio-char comprises pyrolyzed biomass from a bio-fuel crop and/or comprises pyrolyzed grass. The asphalt modifier can improve the performance of asphalt compositions such as asphalt binder compositions and compositions comprising asphalt binder and aggregate. For example, the bio-modifier can improve the temperature susceptibility of asphalt binder compositions and increase the rutting resistance, moisture and cracking resistance of hot mix asphalt compositions. In addition, methods of preparing the bio-modifier composition, methods of preparing modified asphalts comprising the bio-modifier, and modified asphalt compositions are provided.