Electrolysis of Liquefied Biomass for Sustainable Hydrogen and Organic Compound Production: A Biorefinery Approach by Ana P. R. A. Ferreira M. Margarida Mateus & Diogo M. F. Santos

Author:Ana P. R. A. Ferreira, M. Margarida Mateus & Diogo M. F. Santos
Format: pdf
Tags: Liquefaction is an effective thermochemical process for converting lignocellulosic biomass into bio-oil, a hydrocarbon-rich resource. This study explores liquefied biomass electrolysis as a novel method to promote the electrocracking of organic molecules into value-added compounds while simultaneously producing hydrogen (H2). Key innovations include utilizing water from the liquefaction process as an electrolyte component to minimize industrial waste and incorporating carbon dioxide (CO2) into the process to enhance decarbonization efforts and generate valuable byproducts. The electrolysis process was optimized by adding 2 M KOH, and voltammetric methods were employed to analyze the resulting emulsion. The experimental conditions, such as the temperature, anode material, current type, applied cell voltage, and CO2 bubbling, were systematically evaluated. Direct current electrolysis at 70 C using nickel electrodes produced 55 mL of H2 gas with the highest Faradaic (43%) and energetic (39%) efficiency. On the other hand, pulsed electrolysis at room temperature generated a higher H2 gas volume (102 mL) but was less efficient, showing 30% Faradaic and 11% energetic efficiency. FTIR analysis revealed no significant functional group changes in the electrolyte post-electrolysis. Additionally, the solid deposits formed at the anode had an ash content of 36%. This work demonstrates that electrocracking bio-oil is a clean, sustainable approach to H2 production and the synthesis of valuable organic compounds, offering significant potential for biorefinery applications., liquefied biomass; bio-oil; electrolysis; hydrogen; electrocracking; CO2 reduction


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