Valorization of pinecone as a pyrolysis feedstock: identification of bio-oil and synthesis of activated biochar for Cr(VI) elimination from wastewater
The thermal pyrolysis of pinecone (PC) to produce pyrolytic oil (PO) and solid biochar (BC) in a batch-scale fixed-bed reactor at numerous temperatures (400–600 °C) for diverse time intervals (30–120 min) using different particle sizes (0.26–0.841 mm) and various rates of heating (10–50 °C/min), as...
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Académie des sciences
2024-11-01
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| Series: | Comptes Rendus. Chimie |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.351/ |
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| author | Alfares, Amenah Adnan Younis, Afyaa Muayed Rasheed, Lana Abdalhameed Fadhil, Abdelrahman Basil |
| author_facet | Alfares, Amenah Adnan Younis, Afyaa Muayed Rasheed, Lana Abdalhameed Fadhil, Abdelrahman Basil |
| author_sort | Alfares, Amenah Adnan |
| collection | DOAJ |
| description | The thermal pyrolysis of pinecone (PC) to produce pyrolytic oil (PO) and solid biochar (BC) in a batch-scale fixed-bed reactor at numerous temperatures (400–600 °C) for diverse time intervals (30–120 min) using different particle sizes (0.26–0.841 mm) and various rates of heating (10–50 °C/min), as established in this work, led to the production of a high yield of the PO (42.12%) at 500 °C for 1 h with a 0.40 mm particle size and a heating rate of 30 °C/min. The bio-oil (BO) content in the resulting PO amounted to 10.20%. The 1H NMR and GC-MS spectroscopy, besides the ultimate analysis of the BO, were identified. The consequences disclosed that the BO principally consisted of oxygenated hydrocarbons, which amounted to 54.98%, besides the N-organic compounds and hydrocarbons, whose contents were 6.95% and 2.60%, respectively. The BO had a high content of C and H besides its remarkably high caloric value (26.99 MJ/kg), suggesting its potential as a high-energy fuel. The K2CO3-activation of the BC leftover after the pyrolysis of PC produced a microporous activated biochar (ABC) with a BET surface area of 465.55 m2/g and 1.97 nm average pore diameter using 2:1 K2CO3:BC impregnation ratio at 750 °C for 1 h. The ABC exhibited an adsorptive elimination of 98.71% for 100 mL of solution containing 150 ppm of Cr(VI) from its aqueous phase using 0.20 g of ABC at 35 °C for 140 min and a pH = 2.0. The Langmuir isotherm and the psedue-2nd-order model of kinetics best described the Cr(VI) adsorption by the ABC. In conclusion, PC could be used as a pyrolysis feedstock to produce BO with high-content aromatic oxygenates besides ABC with a high surface area, a microporous structure and an efficient ability to eliminate Cr(VI) ions from wastewater. |
| format | Article |
| id | doaj-art-eeef7d3ffa36482f96bc471957e94323 |
| institution | Kabale University |
| issn | 1878-1543 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Chimie |
| spelling | doaj-art-eeef7d3ffa36482f96bc471957e943232025-02-07T13:40:48ZengAcadémie des sciencesComptes Rendus. Chimie1878-15432024-11-0111910.5802/crchim.35110.5802/crchim.351Valorization of pinecone as a pyrolysis feedstock: identification of bio-oil and synthesis of activated biochar for Cr(VI) elimination from wastewaterAlfares, Amenah Adnan0Younis, Afyaa Muayed1Rasheed, Lana Abdalhameed2Fadhil, Abdelrahman Basil3https://orcid.org/0000-0003-1594-4293Mosul University, Department of Chemistry, College of Science, Majmoaa Street, 41002, Mosul, IraqMosul University, Department of Chemistry, College of Science, Majmoaa Street, 41002, Mosul, IraqMosul University, Department of Chemistry, College of Science, Majmoaa Street, 41002, Mosul, IraqMosul University, Department of Chemistry, College of Science, Majmoaa Street, 41002, Mosul, IraqThe thermal pyrolysis of pinecone (PC) to produce pyrolytic oil (PO) and solid biochar (BC) in a batch-scale fixed-bed reactor at numerous temperatures (400–600 °C) for diverse time intervals (30–120 min) using different particle sizes (0.26–0.841 mm) and various rates of heating (10–50 °C/min), as established in this work, led to the production of a high yield of the PO (42.12%) at 500 °C for 1 h with a 0.40 mm particle size and a heating rate of 30 °C/min. The bio-oil (BO) content in the resulting PO amounted to 10.20%. The 1H NMR and GC-MS spectroscopy, besides the ultimate analysis of the BO, were identified. The consequences disclosed that the BO principally consisted of oxygenated hydrocarbons, which amounted to 54.98%, besides the N-organic compounds and hydrocarbons, whose contents were 6.95% and 2.60%, respectively. The BO had a high content of C and H besides its remarkably high caloric value (26.99 MJ/kg), suggesting its potential as a high-energy fuel. The K2CO3-activation of the BC leftover after the pyrolysis of PC produced a microporous activated biochar (ABC) with a BET surface area of 465.55 m2/g and 1.97 nm average pore diameter using 2:1 K2CO3:BC impregnation ratio at 750 °C for 1 h. The ABC exhibited an adsorptive elimination of 98.71% for 100 mL of solution containing 150 ppm of Cr(VI) from its aqueous phase using 0.20 g of ABC at 35 °C for 140 min and a pH = 2.0. The Langmuir isotherm and the psedue-2nd-order model of kinetics best described the Cr(VI) adsorption by the ABC. In conclusion, PC could be used as a pyrolysis feedstock to produce BO with high-content aromatic oxygenates besides ABC with a high surface area, a microporous structure and an efficient ability to eliminate Cr(VI) ions from wastewater.https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.351/PineconePyrolysisBio-oilActivated biocharCr(VI) adsorption |
| spellingShingle | Alfares, Amenah Adnan Younis, Afyaa Muayed Rasheed, Lana Abdalhameed Fadhil, Abdelrahman Basil Valorization of pinecone as a pyrolysis feedstock: identification of bio-oil and synthesis of activated biochar for Cr(VI) elimination from wastewater Comptes Rendus. Chimie Pinecone Pyrolysis Bio-oil Activated biochar Cr(VI) adsorption |
| title | Valorization of pinecone as a pyrolysis feedstock: identification of bio-oil and synthesis of activated biochar for Cr(VI) elimination from wastewater |
| title_full | Valorization of pinecone as a pyrolysis feedstock: identification of bio-oil and synthesis of activated biochar for Cr(VI) elimination from wastewater |
| title_fullStr | Valorization of pinecone as a pyrolysis feedstock: identification of bio-oil and synthesis of activated biochar for Cr(VI) elimination from wastewater |
| title_full_unstemmed | Valorization of pinecone as a pyrolysis feedstock: identification of bio-oil and synthesis of activated biochar for Cr(VI) elimination from wastewater |
| title_short | Valorization of pinecone as a pyrolysis feedstock: identification of bio-oil and synthesis of activated biochar for Cr(VI) elimination from wastewater |
| title_sort | valorization of pinecone as a pyrolysis feedstock identification of bio oil and synthesis of activated biochar for cr vi elimination from wastewater |
| topic | Pinecone Pyrolysis Bio-oil Activated biochar Cr(VI) adsorption |
| url | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.351/ |
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