Raman Spectroscopy of Lignite Gasification Char Morphotypes
The purpose of this study is to characterize and compare the microstructural features of the main morphotypes occurring in the char obtained at 850–950 °C by fluidized bed gasification of lignite from the “Szczerców” deposit (Central Poland), and to bring new insights into the knowledge on the origi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/16/6057 |
| _version_ | 1797432261477400576 |
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| author | Rafał Morga Barbara Bielowicz |
| author_facet | Rafał Morga Barbara Bielowicz |
| author_sort | Rafał Morga |
| collection | DOAJ |
| description | The purpose of this study is to characterize and compare the microstructural features of the main morphotypes occurring in the char obtained at 850–950 °C by fluidized bed gasification of lignite from the “Szczerców” deposit (Central Poland), and to bring new insights into the knowledge on the origin of these morphotypes. Optical microscopy and Raman spectroscopy were used. The char is composed mostly of crassinetwork and inertoid, accompanied by tenuinetwork and small amounts of fusinoid. Tenuinetwork originates mainly from textinite, crassinetwork is formed from attrinite, while inertoid results from transformation of strongly gelified macerals such as densinite and ulminite. Similarities in the microstructure of tenuinetwork and crassinetwork as well as inertoid and fusinoid are observed. Inertoid and fusinoid are composed of larger aromatic systems, with lower amount of alkyl-aryl structures, and their microstructure is better organized compared to tenuinetwork and crassinetwork. Inertoid and fusinoid differ in microscopic appearance and were formed from different starting materials, but their microstructural properties converged during gasification. Different morphological features of the network morphotypes (tenuinetwork, crassinetwork) are not reflected in the differences in their microstructural characteristics. |
| first_indexed | 2024-03-09T09:57:49Z |
| format | Article |
| id | doaj.art-e0d2730fb98b47d7b021c35715bc6ff2 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T09:57:49Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-e0d2730fb98b47d7b021c35715bc6ff22023-12-01T23:40:36ZengMDPI AGEnergies1996-10732022-08-011516605710.3390/en15166057Raman Spectroscopy of Lignite Gasification Char MorphotypesRafał Morga0Barbara Bielowicz1Faculty of Mining, Safety Engineering and Industrial Automation, Silesian University of Technology, Akademicka 2, 44-100 Gliwice, PolandFaculty of Geology, Geophysics and Environment Protection, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, PolandThe purpose of this study is to characterize and compare the microstructural features of the main morphotypes occurring in the char obtained at 850–950 °C by fluidized bed gasification of lignite from the “Szczerców” deposit (Central Poland), and to bring new insights into the knowledge on the origin of these morphotypes. Optical microscopy and Raman spectroscopy were used. The char is composed mostly of crassinetwork and inertoid, accompanied by tenuinetwork and small amounts of fusinoid. Tenuinetwork originates mainly from textinite, crassinetwork is formed from attrinite, while inertoid results from transformation of strongly gelified macerals such as densinite and ulminite. Similarities in the microstructure of tenuinetwork and crassinetwork as well as inertoid and fusinoid are observed. Inertoid and fusinoid are composed of larger aromatic systems, with lower amount of alkyl-aryl structures, and their microstructure is better organized compared to tenuinetwork and crassinetwork. Inertoid and fusinoid differ in microscopic appearance and were formed from different starting materials, but their microstructural properties converged during gasification. Different morphological features of the network morphotypes (tenuinetwork, crassinetwork) are not reflected in the differences in their microstructural characteristics.https://www.mdpi.com/1996-1073/15/16/6057lignitegasificationcharmorphotypesRaman spectroscopy |
| spellingShingle | Rafał Morga Barbara Bielowicz Raman Spectroscopy of Lignite Gasification Char Morphotypes Energies lignite gasification char morphotypes Raman spectroscopy |
| title | Raman Spectroscopy of Lignite Gasification Char Morphotypes |
| title_full | Raman Spectroscopy of Lignite Gasification Char Morphotypes |
| title_fullStr | Raman Spectroscopy of Lignite Gasification Char Morphotypes |
| title_full_unstemmed | Raman Spectroscopy of Lignite Gasification Char Morphotypes |
| title_short | Raman Spectroscopy of Lignite Gasification Char Morphotypes |
| title_sort | raman spectroscopy of lignite gasification char morphotypes |
| topic | lignite gasification char morphotypes Raman spectroscopy |
| url | https://www.mdpi.com/1996-1073/15/16/6057 |
| work_keys_str_mv | AT rafałmorga ramanspectroscopyoflignitegasificationcharmorphotypes AT barbarabielowicz ramanspectroscopyoflignitegasificationcharmorphotypes |