Hemp stalk contains lignin:
“Lignin could hold the answer to achieving a complete bio-based jet fuel.
Researchers at NREL, Massachusetts Institute of Technology, and Washington State University have reported success in using #lignin as a path toward a drop-in 100% sustainable aviation fuel (#SAF). Lignin makes up the rigid parts of the cell walls of plants. Other parts of plants are used for biofuels, but lignin has been largely overlooked because of the difficulties in breaking it down chemically and converting it into useful products.
The research, published in Cell Press: Joule, demonstrated a process the researchers developed to remove the oxygen from lignin, such that the resulting hydrocarbons could be used as a jet fuel blendstock.”