Demineralization of Miscanthus Biocrude Obtained from Catalytic Hydrothermal Liquefaction: Conditioning through Acid Washing

In this contribution, we successfully applied demineralization (i.e., solvent-assisted separation and acid washing) for the removal of carbonaceous solids inorganics from a biocrude obtained catalytic hydrothermal liquefaction (HTL) Miscanthus. The experimental results all six employed acids showed that 0.1 M H2SO4 was most effective significantly reduced metallic (Fe by 93.9%, <15 µg/g Mg 95.6%, 2.1 µg/g) ash content (by 92.7% to 337 already filtered biocrude. utilized demineralizing agents caused loss nitrogen organic carbon (1% total (TOC) 0.058% (TN) in H2SO4). Gas chromatography-mass spectrometry (GC–MS) clarified nature loss, showing 54% ketones 39% alcohols were removed when employed. Furthermore, FT-IR spectra remained same before after washing without affecting any functional groups. This work therefore proposes as viable route high inorganic lignocellulosic HTL biocrudes.