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Due to increasing energetic demand, the search for alternative energy sources has increased considerably. Biomass, among other alternatives, has been chosen as a solution, because it can be converted into gas, liquid, and solid phases through several processes. This study presents results on the slow co-pyrolysis of Laminaria digitata (LD) and pinecones (PC), at an average temperature of 560 °C, for mass ratios LD/PC of 100/0, 50/50, 30/70, 10/90 and 0/100. In addition, a thermogravimetric analysis was performed for PC and LD. The biochar yields varied from 35.3 to 31.2%, for bio-oils, the yields were in the range of 23.3–39.9%, and for the gas phase, between 41.4 and 28.9%, as the amount of PC increased in the feeding mixture. The biochars were characterized in terms of proximate analysis and higher heating value (HHV). The properties of bio-oils that were determined included pH, density and HHV, as well as identification of compounds by infrared analysis. CO2, CO, CH4 and H2 were identified in the gas phase of all the experiments by gas-chromatography, but the most produced gas was CO2, followed by CO.

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Co-Pyrolysis of Brown Macroalgae and Pinecones in a Fixed Bed Reactor

  • 会议论文

  • 发表日期：

    2025年

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  • Felipe T. Silva,
  • Mariana Nascimento,
  • Rosa M. Pilão,
  • Paula Neto,
  • Albina M. Ribeiro

摘要

Due to increasing energetic demand, the search for alternative energy sources has increased considerably. Biomass, among other alternatives, has been chosen as a solution, because it can be converted into gas, liquid, and solid phases through several processes. This study presents results on the slow co-pyrolysis of Laminaria digitata (LD) and pinecones (PC), at an average temperature of 560 °C, for mass ratios LD/PC of 100/0, 50/50, 30/70, 10/90 and 0/100. In addition, a thermogravimetric analysis was performed for PC and LD. The biochar yields varied from 35.3 to 31.2%, for bio-oils, the yields were in the range of 23.3–39.9%, and for the gas phase, between 41.4 and 28.9%, as the amount of PC increased in the feeding mixture. The biochars were characterized in terms of proximate analysis and higher heating value (HHV). The properties of bio-oils that were determined included pH, density and HHV, as well as identification of compounds by infrared analysis. CO2, CO, CH4 and H2 were identified in the gas phase of all the experiments by gas-chromatography, but the most produced gas was CO2, followed by CO.