Depolymerization of PMMA-Based Dental Resin Scraps on Different Production Scales
This research explores the depolymerization of waste polymethyl methacrylate (PMMAW) from dental material in fixed bed semi-batch reactors, focusing on three production scales: laboratory, technical and pilot. The study investigates the thermal degradation mechanism and kinetics of PMMAW through the...
| 主要な著者: | , , , , , , , , , , , , |
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| フォーマット: | 論文 |
| 言語: | English |
| 出版事項: |
MDPI AG
2024-03-01
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| シリーズ: | Energies |
| 主題: | |
| オンライン･アクセス: | https://www.mdpi.com/1996-1073/17/5/1196 |
| _version_ | 1827319655175290880 |
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| author | Haroldo Jorge da Silva Ribeiro Armando Costa Ferreira Caio Campos Ferreira Lia Martins Pereira Marcelo Costa Santos Lauro Henrique Hamoy Guerreiro Fernanda Paula da Costa Assunção Sílvio Alex Pereira da Mota Douglas Alberto Rocha de Castro Sergio Duvoisin Luiz Eduardo Pizarro Borges Nélio Teixeira Machado Lucas Pinto Bernar |
| author_facet | Haroldo Jorge da Silva Ribeiro Armando Costa Ferreira Caio Campos Ferreira Lia Martins Pereira Marcelo Costa Santos Lauro Henrique Hamoy Guerreiro Fernanda Paula da Costa Assunção Sílvio Alex Pereira da Mota Douglas Alberto Rocha de Castro Sergio Duvoisin Luiz Eduardo Pizarro Borges Nélio Teixeira Machado Lucas Pinto Bernar |
| author_sort | Haroldo Jorge da Silva Ribeiro |
| collection | DOAJ |
| description | This research explores the depolymerization of waste polymethyl methacrylate (PMMAW) from dental material in fixed bed semi-batch reactors, focusing on three production scales: laboratory, technical and pilot. The study investigates the thermal degradation mechanism and kinetics of PMMAW through thermogravimetric (TG) and differential scanning calorimetry (DSC) analyses, revealing a two-step degradation process. The heat flow during PMMAW decomposition is measured by DSC, providing essential parameters for designing pyrolysis processes. The results demonstrate the potential of DSC for energetic analysis and process design, with attention to standardization challenges. Material balance analysis across the production scales reveals a temperature gradient across the fixed bed negatively impacting liquid yield and methyl methacrylate (MMA) concentration. Reactor load and power load variables are introduced, demonstrating decreased temperature with increased process scale. The study identifies the influence of temperature on MMA concentration in the liquid fraction, emphasizing the importance of controlling temperature for efficient depolymerization. Furthermore, the research highlights the formation of aromatic hydrocarbons from the remaining char, indicating a shift in liquid composition during the depolymerization process. The study concludes that lower temperatures below 450 °C favor liquid fractions rich in MMA, suggesting the benefits of lower temperatures and slower heating rates in semi-batch depolymerization. The findings contribute to a novel approach for analyzing pyrolysis processes, emphasizing reactor design and economic considerations for recycling viability. Future research aims to refine and standardize the analysis and design protocols for pyrolysis and similar processes. |
| first_indexed | 2024-04-25T00:31:17Z |
| format | Article |
| id | doaj.art-84690eaa1e9d4a779c428f4b5d531752 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-25T00:31:17Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-84690eaa1e9d4a779c428f4b5d5317522024-03-12T16:43:41ZengMDPI AGEnergies1996-10732024-03-01175119610.3390/en17051196Depolymerization of PMMA-Based Dental Resin Scraps on Different Production ScalesHaroldo Jorge da Silva Ribeiro0Armando Costa Ferreira1Caio Campos Ferreira2Lia Martins Pereira3Marcelo Costa Santos4Lauro Henrique Hamoy Guerreiro5Fernanda Paula da Costa Assunção6Sílvio Alex Pereira da Mota7Douglas Alberto Rocha de Castro8Sergio Duvoisin9Luiz Eduardo Pizarro Borges10Nélio Teixeira Machado11Lucas Pinto Bernar12Graduate Program of Natural Resources Engineering of Amazon, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, BrazilGraduate Program of Natural Resources Engineering of Amazon, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, BrazilGraduate Program of Natural Resources Engineering of Amazon, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, BrazilGraduate Program of Natural Resources Engineering of Amazon, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, BrazilGraduate Program of Natural Resources Engineering of Amazon, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, BrazilGraduate Program of Civil Engineering, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, BrazilGraduate Program of Civil Engineering, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, BrazilGraduate Program of Chemistry, Universidade Federal do Sul e Sudeste do Pará, Folha 31, Quadra 7, Lote Especial—Nova Marabá, Marabá 68507-590, BrazilCentro Universitário Luterano de Manaus—CEULM/ULBRA, Avenida Carlos Drummond de Andrade N°. 1460, Manaus 69077-730, BrazilFaculty of Chemical Engineering, Universidade do Estado do Amazonas-UEA, Avenida Darcy Vargas N°. 1200, Manaus 69050-020, BrazilLaboratory 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, BrazilGraduate Program of Natural Resources Engineering of Amazon, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, BrazilGraduate Program of Natural Resources Engineering of Amazon, Campus Profissional-UFPA, Universidade Federal do Pará, Rua Augusto Corrêa N° 1, Belém 66075-110, BrazilThis research explores the depolymerization of waste polymethyl methacrylate (PMMAW) from dental material in fixed bed semi-batch reactors, focusing on three production scales: laboratory, technical and pilot. The study investigates the thermal degradation mechanism and kinetics of PMMAW through thermogravimetric (TG) and differential scanning calorimetry (DSC) analyses, revealing a two-step degradation process. The heat flow during PMMAW decomposition is measured by DSC, providing essential parameters for designing pyrolysis processes. The results demonstrate the potential of DSC for energetic analysis and process design, with attention to standardization challenges. Material balance analysis across the production scales reveals a temperature gradient across the fixed bed negatively impacting liquid yield and methyl methacrylate (MMA) concentration. Reactor load and power load variables are introduced, demonstrating decreased temperature with increased process scale. The study identifies the influence of temperature on MMA concentration in the liquid fraction, emphasizing the importance of controlling temperature for efficient depolymerization. Furthermore, the research highlights the formation of aromatic hydrocarbons from the remaining char, indicating a shift in liquid composition during the depolymerization process. The study concludes that lower temperatures below 450 °C favor liquid fractions rich in MMA, suggesting the benefits of lower temperatures and slower heating rates in semi-batch depolymerization. The findings contribute to a novel approach for analyzing pyrolysis processes, emphasizing reactor design and economic considerations for recycling viability. Future research aims to refine and standardize the analysis and design protocols for pyrolysis and similar processes.https://www.mdpi.com/1996-1073/17/5/1196PMMA wasteprocess designthermogravimetrydifferential scanning calorimetryprocess scale influence |
| spellingShingle | Haroldo Jorge da Silva Ribeiro Armando Costa Ferreira Caio Campos Ferreira Lia Martins Pereira Marcelo Costa Santos Lauro Henrique Hamoy Guerreiro Fernanda Paula da Costa Assunção Sílvio Alex Pereira da Mota Douglas Alberto Rocha de Castro Sergio Duvoisin Luiz Eduardo Pizarro Borges Nélio Teixeira Machado Lucas Pinto Bernar Depolymerization of PMMA-Based Dental Resin Scraps on Different Production Scales Energies PMMA waste process design thermogravimetry differential scanning calorimetry process scale influence |
| title | Depolymerization of PMMA-Based Dental Resin Scraps on Different Production Scales |
| title_full | Depolymerization of PMMA-Based Dental Resin Scraps on Different Production Scales |
| title_fullStr | Depolymerization of PMMA-Based Dental Resin Scraps on Different Production Scales |
| title_full_unstemmed | Depolymerization of PMMA-Based Dental Resin Scraps on Different Production Scales |
| title_short | Depolymerization of PMMA-Based Dental Resin Scraps on Different Production Scales |
| title_sort | depolymerization of pmma based dental resin scraps on different production scales |
| topic | PMMA waste process design thermogravimetry differential scanning calorimetry process scale influence |
| url | https://www.mdpi.com/1996-1073/17/5/1196 |
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