An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient Temperature
Sustainable civil construction in the future, besides having low energy consumption and greenhouse gas emissions, must also adopt the principle of reusing wastes generated in the production chain that impact the environment. The aluminum production chain includes refining using the Bayer process. On...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/1287243 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832545746674515968 |
|---|---|
| author | Woshington S. Brito André L. Mileo Ferraioli Silva Rozineide A. A. Boca Santa Kristoff Svensson José Antônio da Silva Souza Herbert Pöllmann Humberto Gracher Riella |
| author_facet | Woshington S. Brito André L. Mileo Ferraioli Silva Rozineide A. A. Boca Santa Kristoff Svensson José Antônio da Silva Souza Herbert Pöllmann Humberto Gracher Riella |
| author_sort | Woshington S. Brito |
| collection | DOAJ |
| description | Sustainable civil construction in the future, besides having low energy consumption and greenhouse gas emissions, must also adopt the principle of reusing wastes generated in the production chain that impact the environment. The aluminum production chain includes refining using the Bayer process. One of the main wastes produced by the Bayer process that has an impact on the environment is fly ash. Geopolymers are cementitious materials with a three-dimensional structure formed by the chemical activation of aluminosilicates. According to studies, some are proving to be appropriate sources of Al and Si in the geopolymerization reaction. The research reported here sought to assess the possibility of reusing fly ash characteristic of the operational temperature and pressure conditions of Bayer process boilers in geopolymer synthesis. Geopolymerization reaction was conducted at an ambient temperature of 30°C, and the activator used was sodium hydroxide (NaOH) 15 molar and sodium silicate (Na2SiO3) alkaline 10 molar. Fly ash and metakaolin were used as sources of Al and Si. XRD, XRF, and SEM Techniques were used for characterizing the raw materials and geopolymers. As a study parameter, the mole ratios utilized followed data from the literature described by Davidovits (year), so that the best results of the geopolymer samples were obtained in the 2.5 to 3.23 range. Resistance to mechanical compression reached 25 MPa in 24 hours of curing and 44 MPa after 28 days of curing at ambient temperature. |
| format | Article |
| id | doaj-art-dc0d7e91f72a4bd9bf17e365ecebc2dd |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-dc0d7e91f72a4bd9bf17e365ecebc2dd2025-02-03T07:24:53ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/12872431287243An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient TemperatureWoshington S. Brito0André L. Mileo Ferraioli Silva1Rozineide A. A. Boca Santa2Kristoff Svensson3José Antônio da Silva Souza4Herbert Pöllmann5Humberto Gracher Riella6Pará Federal University, 66075-110 Belém, PA, BrazilPará Federal University, 66075-110 Belém, PA, BrazilChemical Engineering Department, Santa Catarina Federal University, 88040-900 Florianópolis, SC, BrazilDepartment of Geosciences and Geography, Martin Luther University of Halle-Wittenberg, Halle 06108, GermanyDepartment of Geosciences and Geography, Martin Luther University of Halle-Wittenberg, Halle 06108, GermanyDepartment of Geosciences and Geography, Martin Luther University of Halle-Wittenberg, Halle 06108, GermanyChemical Engineering Department, Santa Catarina Federal University, 88040-900 Florianópolis, SC, BrazilSustainable civil construction in the future, besides having low energy consumption and greenhouse gas emissions, must also adopt the principle of reusing wastes generated in the production chain that impact the environment. The aluminum production chain includes refining using the Bayer process. One of the main wastes produced by the Bayer process that has an impact on the environment is fly ash. Geopolymers are cementitious materials with a three-dimensional structure formed by the chemical activation of aluminosilicates. According to studies, some are proving to be appropriate sources of Al and Si in the geopolymerization reaction. The research reported here sought to assess the possibility of reusing fly ash characteristic of the operational temperature and pressure conditions of Bayer process boilers in geopolymer synthesis. Geopolymerization reaction was conducted at an ambient temperature of 30°C, and the activator used was sodium hydroxide (NaOH) 15 molar and sodium silicate (Na2SiO3) alkaline 10 molar. Fly ash and metakaolin were used as sources of Al and Si. XRD, XRF, and SEM Techniques were used for characterizing the raw materials and geopolymers. As a study parameter, the mole ratios utilized followed data from the literature described by Davidovits (year), so that the best results of the geopolymer samples were obtained in the 2.5 to 3.23 range. Resistance to mechanical compression reached 25 MPa in 24 hours of curing and 44 MPa after 28 days of curing at ambient temperature.http://dx.doi.org/10.1155/2018/1287243 |
| spellingShingle | Woshington S. Brito André L. Mileo Ferraioli Silva Rozineide A. A. Boca Santa Kristoff Svensson José Antônio da Silva Souza Herbert Pöllmann Humberto Gracher Riella An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient Temperature Advances in Materials Science and Engineering |
| title | An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient Temperature |
| title_full | An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient Temperature |
| title_fullStr | An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient Temperature |
| title_full_unstemmed | An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient Temperature |
| title_short | An Assessment of Reuse of Light Ash from Bayer Process Fluidized Bed Boilers in Geopolymer Synthesis at Ambient Temperature |
| title_sort | assessment of reuse of light ash from bayer process fluidized bed boilers in geopolymer synthesis at ambient temperature |
| url | http://dx.doi.org/10.1155/2018/1287243 |
| work_keys_str_mv | AT woshingtonsbrito anassessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT andrelmileoferraiolisilva anassessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT rozineideaabocasanta anassessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT kristoffsvensson anassessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT joseantoniodasilvasouza anassessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT herbertpollmann anassessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT humbertogracherriella anassessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT woshingtonsbrito assessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT andrelmileoferraiolisilva assessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT rozineideaabocasanta assessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT kristoffsvensson assessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT joseantoniodasilvasouza assessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT herbertpollmann assessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature AT humbertogracherriella assessmentofreuseoflightashfrombayerprocessfluidizedbedboilersingeopolymersynthesisatambienttemperature |