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Analysis of Thermal and Catalytic Pyrolysis Processes in Belém: A Socioeconomic Perspective

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  • Fernanda Paula da Costa Assunção

    (Graduate Program of Civil Engineering, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, Brazil)

  • Jéssica Cristina Conte da Silva

    (Graduate Program of Civil Engineering, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, Brazil)

  • Fernando Felipe Soares Almeida

    (Graduate Program of Civil Engineering, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, Brazil)

  • Marcelo Costa Santos

    (Graduate Program of Natural Resources Engineering of Amazon, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, Brazil)

  • Simone Patrícia Aranha da Paz

    (Graduate Program of Natural Resources Engineering of Amazon, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, Brazil)

  • Douglas Alberto Rocha de Castro

    (Department of Chemical Engineering, Federal University of Amazonas, Av. General Rodrigo Octavio Jordão Ramos n° 1200—Coroado I, Manaus 69067-005, Brazil)

  • Jorge Fernando Hungria Ferreira

    (Center for Natural Sciences and Technology, Universidade do Estado do Pará, Av. Bom Jesus, s/n°, Altamira 68377-078, Brazil)

  • Neyson Martins Mendonça

    (Faculty of Sanitary and Environmental Engineering, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Corrêa N° 1, Belém 66075-900, Brazil)

  • Mel Safira Cruz do Nascimento

    (Faculty of Sanitary and Environmental Engineering, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Corrêa N° 1, Belém 66075-900, Brazil)

  • José Almir Rodrigues Pereira

    (Faculty of Sanitary and Environmental Engineering, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Corrêa N° 1, Belém 66075-900, Brazil)

  • Aline Christian Pimentel Almeida

    (Faculty of Sanitary and Environmental Engineering, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Corrêa N° 1, Belém 66075-900, Brazil)

  • Sergio Duvoisin Junior

    (Faculty of Chemical Engineering, Universidade do Estado do Amazonas-UEA, Avenida Darcy Vargas N°1200, Manaus 69050-020, Brazil)

  • Luiz Eduardo Pizarro Borges

    (Laboratory of Catalyst Preparation and Catalytic Cracking, Section of Chemical Engineering, Instituto Militar de Engenharia-IME, Praça General Tibúrcio N°. 80, Rio de Janeiro 22290-270, Brazil)

  • Nélio Teixeira Machado

    (Graduate Program of Civil Engineering, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, Brazil
    Graduate Program of Natural Resources Engineering of Amazon, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, Brazil
    Faculty of Sanitary and Environmental Engineering, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Corrêa N° 1, Belém 66075-900, Brazil)

Abstract

This study aims to assess the by-products generated through the thermal and catalytic pyrolysis of the organic matter and paper fractions of municipal solid waste (MSW) in different socioeconomic regions, through the yields of reaction products (bio-oil, biochar, H 2 O, and gas), acid value and chemical composition of bio-oils, and characterization of biochar, on a laboratory scale. The organic matter and paper segregated from the gravimetric composition of the total waste sample were subjected to drying, crushing, and sieving pre-treatment. The experiments were carried out at 450 °C and 1.0 atmosphere, and at 400 °C and 475 °C and 1.0 atmosphere, using a basic catalyst, Ca(OH) 2 , at 10.0% by mass, in discontinuous mode. The bio-oil was characterized by acidity value and the chemical functions present in the bio-oil identified by FT-IR, NMR, and composition by GC-MS. The biochar was characterized by SEM/EDS and XRD. The bio-oil yield increased with the addition of the catalyst and the pyrolysis temperature. For catalytic pyrolysis, bio-char and gas yields increased slightly with the Ca(OH) 2 content, while bio-oil and H 2 O phases remained constant. The GC-MS of the liquid reaction products identified the presence of hydrocarbons and oxygenates, as well as nitrogen-containing compounds, including amides and amines. The acidity of the bio-oil decreased with the addition of the basic catalyst in the process. The concentration of hydrocarbons in the bio-oil appeared with the addition of the catalyst in the catalytic pyrolysis process as the catalytic deoxygenation of fatty acid molecules occurred, through decarboxylation/decarbonylation, producing aliphatic and aromatic hydrocarbons, introducing the basic catalyst into the thermal process.

Suggested Citation

  • Fernanda Paula da Costa Assunção & Jéssica Cristina Conte da Silva & Fernando Felipe Soares Almeida & Marcelo Costa Santos & Simone Patrícia Aranha da Paz & Douglas Alberto Rocha de Castro & Jorge Fer, 2025. "Analysis of Thermal and Catalytic Pyrolysis Processes in Belém: A Socioeconomic Perspective," Energies, MDPI, vol. 18(17), pages 1-31, August.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:17:p:4532-:d:1733501
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    References listed on IDEAS

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