Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas Separation
Glycerin, a low-valued waste from biodiesel production, and dopamine were used as precursors for adsorbent materials. The study is centered on the preparation and application of microporous activated carbon as adsorbent materials in the separation of ethane/ethylene and of gases that are natural gas...
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MDPI AG
2023-05-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/10/4071 |
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| author | Mary Batista Renato Carvalho Moisés L. Pinto João Pires |
| author_facet | Mary Batista Renato Carvalho Moisés L. Pinto João Pires |
| author_sort | Mary Batista |
| collection | DOAJ |
| description | Glycerin, a low-valued waste from biodiesel production, and dopamine were used as precursors for adsorbent materials. The study is centered on the preparation and application of microporous activated carbon as adsorbent materials in the separation of ethane/ethylene and of gases that are natural gas or landfill gas components (ethane/methane and carbon dioxide/methane). The activated carbons were produced by the following sequence reactions: facile carbonization of a glycerin/dopamine mixture and chemical activation. Dopamine allowed the introduction of nitrogenated groups that improved the selectivity of the separations. The activating agent was KOH, but its mass ratio was kept lower than one to improve the sustainability of the final materials. The solids were characterized by N<sub>2</sub> adsorption/desorption isotherms, SEM, FTIR spectroscopy, elemental analysis, and point of zero charges (pH<sub>PZC</sub>). The order for adsorption of the different adsorbates (in mmolg<sup>−1</sup>) on the most well performing material—Gdop0.75—is methane (2.5) < carbon dioxide (5.0) < ethylene (8.6) < ethane (8.9). |
| first_indexed | 2024-03-11T03:27:25Z |
| format | Article |
| id | doaj.art-6d2c9f20ef4444e58199571a7c2c23c0 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T03:27:25Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-6d2c9f20ef4444e58199571a7c2c23c02023-11-18T02:38:49ZengMDPI AGMolecules1420-30492023-05-012810407110.3390/molecules28104071Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas SeparationMary Batista0Renato Carvalho1Moisés L. Pinto2João Pires3CQE, Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, PortugalIBEROL, Sociedade Ibérica de Biocombustíveis e Oleaginosas, S.A., 2600-531 Alhandra, PortugalCERENA, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, PortugalCQE, Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, PortugalGlycerin, a low-valued waste from biodiesel production, and dopamine were used as precursors for adsorbent materials. The study is centered on the preparation and application of microporous activated carbon as adsorbent materials in the separation of ethane/ethylene and of gases that are natural gas or landfill gas components (ethane/methane and carbon dioxide/methane). The activated carbons were produced by the following sequence reactions: facile carbonization of a glycerin/dopamine mixture and chemical activation. Dopamine allowed the introduction of nitrogenated groups that improved the selectivity of the separations. The activating agent was KOH, but its mass ratio was kept lower than one to improve the sustainability of the final materials. The solids were characterized by N<sub>2</sub> adsorption/desorption isotherms, SEM, FTIR spectroscopy, elemental analysis, and point of zero charges (pH<sub>PZC</sub>). The order for adsorption of the different adsorbates (in mmolg<sup>−1</sup>) on the most well performing material—Gdop0.75—is methane (2.5) < carbon dioxide (5.0) < ethylene (8.6) < ethane (8.9).https://www.mdpi.com/1420-3049/28/10/4071glycerindopamineactivated carbonethaneethyleneadsorption |
| spellingShingle | Mary Batista Renato Carvalho Moisés L. Pinto João Pires Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas Separation Molecules glycerin dopamine activated carbon ethane ethylene adsorption |
| title | Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas Separation |
| title_full | Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas Separation |
| title_fullStr | Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas Separation |
| title_full_unstemmed | Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas Separation |
| title_short | Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas Separation |
| title_sort | novel carbonaceous adsorbents prepared from glycerin waste and dopamine for gas separation |
| topic | glycerin dopamine activated carbon ethane ethylene adsorption |
| url | https://www.mdpi.com/1420-3049/28/10/4071 |
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