Production of Bio-Oil by Pyrolysis of açaí (Euterpe Oleracea, Mart.)Seeds Fibers and Slurry [Powder]

Authors

  • Nélio Teixeira Machado Graduate Program of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa N°1, Belém 66075-110, PA, Brazil Faculty of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil Author
  • Edinilce do Socorro Melo Farias Graduate Program of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa N°1, Belém 66075-110, PA, Brazil Author
  • Ednelson Francisco Oliveira Farias Graduate Program of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa N°1, Belém 66075-110, PA, Brazil Author
  • Thays Jhessica Mota Pinheiro Faculty of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil Author
  • Haroldo Jorge da Silva Ribeiro Faculty of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil Author
  • Marta Chagas Monteiro Graduate Program of Pharmacy, Sector of Health-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil Author

DOI:

https://doi.org/10.47363/JOPNGR/2025(2)106

Keywords:

Pyrolysis, Acai Seed, Bio-Oil, Agro-industrial Waste, Sustainability

Abstract

The intensification of the search for renewable energy sources, combined with growing envi-ronmental concerns regarding the disposal of agro-industrial waste, has driven the development of sustainable technological routes, such as pyrolysis. In this context, the açaí seed, a lignocel-lulosic residue widely available in the Amazon region, stands out as a promising raw material to produce biofuels and value-added chemical inputs. This study aimed to evaluate the feasibility of pyrolysis of açaí seed fibers and sludge, carried out at 450°C, focusing on the production and characterization of bio-oil and aqueous phase.
The preliminary physicochemical characterization of the biomass indicated low ash content and high volatile content, desirable attributes for thermochemical conversion. Pyrolysis tests revealed a bio-oil yield of 1.15% by mass for fibers and 2.13% for sludge, with observed acidity of 173.11 and 144.25 mg KOH/g, respectively. The aqueous phase showed high acidity (191.60 mg KOH/g for fibers and 181.07 mg KOH/g for sludge) and low viscosity (1.45 mm²/s and 1.348 mm²/s, respectively), suggesting a composition rich in volatile organic compounds. FTIR spectroscopic analysis revealed the presence of hy-drocarbons and oxygenated compounds in the bio-oils, and a predominance of organic acids in the aqueous phases. The results demonstrate the potential of pyrolysis in the valorization of agro-industrial waste from the Amazon, contributing to the development of sustainable energy alternatives and the strengthening
of practices aligned with the circular economy.

Author Biographies

  • Nélio Teixeira Machado, Graduate Program of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa N°1, Belém 66075-110, PA, Brazil Faculty of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil

    Graduate Program of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa N°1, Belém 66075-110, PA, Brazil
    Faculty of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil

  • Edinilce do Socorro Melo Farias, Graduate Program of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa N°1, Belém 66075-110, PA, Brazil

    Graduate Program of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa N°1, Belém 66075-110, PA, Brazil

  • Ednelson Francisco Oliveira Farias, Graduate Program of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa N°1, Belém 66075-110, PA, Brazil

    Graduate Program of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa N°1, Belém 66075-110, PA, Brazil

  • Thays Jhessica Mota Pinheiro, Faculty of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil

    Faculty of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil

  • Haroldo Jorge da Silva Ribeiro, Faculty of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil

    Faculty of Sanitary and Environmental Engineering, Professional Campus-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil

  • Marta Chagas Monteiro, Graduate Program of Pharmacy, Sector of Health-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil

    Graduate Program of Pharmacy, Sector of Health-UFPA, Federal University of Pará, Rua Augusto Corrêa No.1, Belém 66075-900, PA, Brazil

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Published

2025-07-03

Issue

Vol. 2 No. 3 (2025): Volume 2 Issue 3

Section

Articles