Preparation of calcium oxide by decomposition of phosphogypsum under CO and water vapor atmosphere
Phosphogypsum (PG) is an industrial solid waste, and the production of CaO by CO reduction of PG can not only solve the environmental problems caused by PG, but also turn waste into treasure to generate CaO. However, the current yield of CaO production by CO reduction of PG is low. To further improv...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2023-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/22/e3sconf_isesce2023_04004.pdf |
| _version_ | 1797829404371451904 |
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| author | Ma Dong Wang Qinhui |
| author_facet | Ma Dong Wang Qinhui |
| author_sort | Ma Dong |
| collection | DOAJ |
| description | Phosphogypsum (PG) is an industrial solid waste, and the production of CaO by CO reduction of PG can not only solve the environmental problems caused by PG, but also turn waste into treasure to generate CaO. However, the current yield of CaO production by CO reduction of PG is low. To further improve the yield of CaO, a technical method of CaO preparation by CO-H2O synergistic reduction of PG is proposed. The impacts of CO concentration, P(H2O)/P(CO) ratio and reaction temperature are examined in this work together with FactSage thermodynamic simulations in order to determine the ideal reaction conditions and reaction mechanism. It is found that the CaO yield could reach 96.78% at 1100 °C of 3% CO and P(H2O)/P(CO) of 10. The mechanism study shows that when the CO atmosphere contains H2O, the reductive decomposition of PG by CO is actually the result of the joint action of CO, H2 and CO2. Overall, this research will help to enhance a novel technological strategy for preparing CaO by decomposition of PG. |
| first_indexed | 2024-04-09T13:19:51Z |
| format | Article |
| id | doaj.art-559e2d05fb6545f886c879c2b9631fd2 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-04-09T13:19:51Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-559e2d05fb6545f886c879c2b9631fd22023-05-11T09:09:12ZengEDP SciencesE3S Web of Conferences2267-12422023-01-013850400410.1051/e3sconf/202338504004e3sconf_isesce2023_04004Preparation of calcium oxide by decomposition of phosphogypsum under CO and water vapor atmosphereMa Dong0Wang Qinhui1State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang UniversityState Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang UniversityPhosphogypsum (PG) is an industrial solid waste, and the production of CaO by CO reduction of PG can not only solve the environmental problems caused by PG, but also turn waste into treasure to generate CaO. However, the current yield of CaO production by CO reduction of PG is low. To further improve the yield of CaO, a technical method of CaO preparation by CO-H2O synergistic reduction of PG is proposed. The impacts of CO concentration, P(H2O)/P(CO) ratio and reaction temperature are examined in this work together with FactSage thermodynamic simulations in order to determine the ideal reaction conditions and reaction mechanism. It is found that the CaO yield could reach 96.78% at 1100 °C of 3% CO and P(H2O)/P(CO) of 10. The mechanism study shows that when the CO atmosphere contains H2O, the reductive decomposition of PG by CO is actually the result of the joint action of CO, H2 and CO2. Overall, this research will help to enhance a novel technological strategy for preparing CaO by decomposition of PG.https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/22/e3sconf_isesce2023_04004.pdf |
| spellingShingle | Ma Dong Wang Qinhui Preparation of calcium oxide by decomposition of phosphogypsum under CO and water vapor atmosphere E3S Web of Conferences |
| title | Preparation of calcium oxide by decomposition of phosphogypsum under CO and water vapor atmosphere |
| title_full | Preparation of calcium oxide by decomposition of phosphogypsum under CO and water vapor atmosphere |
| title_fullStr | Preparation of calcium oxide by decomposition of phosphogypsum under CO and water vapor atmosphere |
| title_full_unstemmed | Preparation of calcium oxide by decomposition of phosphogypsum under CO and water vapor atmosphere |
| title_short | Preparation of calcium oxide by decomposition of phosphogypsum under CO and water vapor atmosphere |
| title_sort | preparation of calcium oxide by decomposition of phosphogypsum under co and water vapor atmosphere |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/22/e3sconf_isesce2023_04004.pdf |
| work_keys_str_mv | AT madong preparationofcalciumoxidebydecompositionofphosphogypsumundercoandwatervaporatmosphere AT wangqinhui preparationofcalciumoxidebydecompositionofphosphogypsumundercoandwatervaporatmosphere |