Basic energy characteristics and isotherm of methanol adsorption on Cu2+ZSM-5 zeolite
This paper presents isotherm results and basic (ΔH, ΔF and ΔS) thermodynamic characteristics of methanol adsorption in Cu2+ZSM-5 zeolite. The trinomial equation of adsorption isotherm by the bulk micropore filling theory (VMOT) is also described. A correlation between adsorption-energy characteristi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/95/e3sconf_emmft2023_02006.pdf |
| _version_ | 1827373339386052608 |
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| author | Ergashev Oybek Bakhronov Khayot Kholmedov Khamid Ganiev Abror Karimov Khasan Khalilov Sarvar |
| author_facet | Ergashev Oybek Bakhronov Khayot Kholmedov Khamid Ganiev Abror Karimov Khasan Khalilov Sarvar |
| author_sort | Ergashev Oybek |
| collection | DOAJ |
| description | This paper presents isotherm results and basic (ΔH, ΔF and ΔS) thermodynamic characteristics of methanol adsorption in Cu2+ZSM-5 zeolite. The trinomial equation of adsorption isotherm by the bulk micropore filling theory (VMOT) is also described. A correlation between adsorption-energy characteristics was found and molecular mechanisms of methanol adsorption in Cu2+ZSM-5 zeolite were revealed in the whole filling region. It was determined that Cu2+ cations are located in shielded positions of the crystal lattice of zeolite ZSM-5. Adsorption of methanol molecule leads to the migration of Cu2+ cations from the zeolite lattice to the crossings formed by the intersection of straight and zigzag channels and to the formation of ion/molecular complexes of different multiplicity in them. It was found that small polar methanol molecules form high-energy hepta complexes with Cu2+ cation and are located in the first coordination sphere in Cu2+ZSM-5 zeolite. It was determined that the average molar entropy (-65 kJ/mol) of methanol adsorption indicates that in the zeolite the mobility of methanol molecules is lower than the liquid phase and close to the mobility of the solid phase. |
| first_indexed | 2024-03-08T11:14:32Z |
| format | Article |
| id | doaj.art-9148848b19db45d688e4abde92113d0f |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-03-08T11:14:32Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-9148848b19db45d688e4abde92113d0f2024-01-26T10:36:36ZengEDP SciencesE3S Web of Conferences2267-12422023-01-014580200610.1051/e3sconf/202345802006e3sconf_emmft2023_02006Basic energy characteristics and isotherm of methanol adsorption on Cu2+ZSM-5 zeoliteErgashev Oybek0Bakhronov Khayot1Kholmedov Khamid2Ganiev Abror3Karimov Khasan4Khalilov Sarvar5Namangan Institute of Engineering and TechnologyTashkent University of Information Technologies named after Muhammad al-KhwarizmiTashkent University of Information Technologies named after Muhammad al-KhwarizmiTashkent University of Information Technologies named after Muhammad al-KhwarizmiTashkent University of Information Technologies named after Muhammad al-KhwarizmiTashkent University of Information Technologies named after Muhammad al-KhwarizmiThis paper presents isotherm results and basic (ΔH, ΔF and ΔS) thermodynamic characteristics of methanol adsorption in Cu2+ZSM-5 zeolite. The trinomial equation of adsorption isotherm by the bulk micropore filling theory (VMOT) is also described. A correlation between adsorption-energy characteristics was found and molecular mechanisms of methanol adsorption in Cu2+ZSM-5 zeolite were revealed in the whole filling region. It was determined that Cu2+ cations are located in shielded positions of the crystal lattice of zeolite ZSM-5. Adsorption of methanol molecule leads to the migration of Cu2+ cations from the zeolite lattice to the crossings formed by the intersection of straight and zigzag channels and to the formation of ion/molecular complexes of different multiplicity in them. It was found that small polar methanol molecules form high-energy hepta complexes with Cu2+ cation and are located in the first coordination sphere in Cu2+ZSM-5 zeolite. It was determined that the average molar entropy (-65 kJ/mol) of methanol adsorption indicates that in the zeolite the mobility of methanol molecules is lower than the liquid phase and close to the mobility of the solid phase.https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/95/e3sconf_emmft2023_02006.pdf |
| spellingShingle | Ergashev Oybek Bakhronov Khayot Kholmedov Khamid Ganiev Abror Karimov Khasan Khalilov Sarvar Basic energy characteristics and isotherm of methanol adsorption on Cu2+ZSM-5 zeolite E3S Web of Conferences |
| title | Basic energy characteristics and isotherm of methanol adsorption on Cu2+ZSM-5 zeolite |
| title_full | Basic energy characteristics and isotherm of methanol adsorption on Cu2+ZSM-5 zeolite |
| title_fullStr | Basic energy characteristics and isotherm of methanol adsorption on Cu2+ZSM-5 zeolite |
| title_full_unstemmed | Basic energy characteristics and isotherm of methanol adsorption on Cu2+ZSM-5 zeolite |
| title_short | Basic energy characteristics and isotherm of methanol adsorption on Cu2+ZSM-5 zeolite |
| title_sort | basic energy characteristics and isotherm of methanol adsorption on cu2 zsm 5 zeolite |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/95/e3sconf_emmft2023_02006.pdf |
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