(251d) Spinning Band Distillation of Pyrolysis Oil Phenolics
AIChE Annual Meeting
2023
2023 AIChE Annual Meeting
Forest and Plant Bioproducts Division
Advanced Separations Processes in Bioprocessing and Biomaterials
Monday, November 6, 2023 - 8:54am to 9:12am
In this talk, we discuss the purification and utilization of partially deoxygenated bio-oil fractions using spinning band distillation. We utilized a spinning band column distillation system, designed to perform at 200 theoretical plates. Catalytic (HZSM-5) pyrolysis bio-oils from switchgrass biomass first underwent extraction directly, producing a phenolic fraction and a hydrocarbon fraction. Subsequently, the phenolic fraction underwent a preliminary flash distillation before spinning band distillation, in order to remove residues. Spinning band distillation resulted in fractions with more than 80 wt% phenol (the balance was o-cresol), which can be purified by recrystallization to >93 wt%. We will also discuss the composition of other fractions characterized using NMR. While weâve distilled hydrocarbon fractions in the past, none have produced a coke residue fraction. We distilled the hydrocarbon fraction and converted this specific residue into a high-purity coke product. Structural and electrical properties will be presented, including results from XRD, resistivity testing, and XRF.