Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas Streams
The paper presents the preparation of new adsorbents based on silica gel (SiO<sub>2</sub>) impregnated with deep eutectic solvents (DESs) to increase benzene, toluene, ethylbenzene, and p-xylene (BTEX) adsorption efficiency from gas streams. The DESs were synthesized by means of choline...
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MDPI AG
2020-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/8/1894 |
| _version_ | 1797570369076330496 |
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| author | Patrycja Makoś Edyta Słupek Aleksandra Małachowska |
| author_facet | Patrycja Makoś Edyta Słupek Aleksandra Małachowska |
| author_sort | Patrycja Makoś |
| collection | DOAJ |
| description | The paper presents the preparation of new adsorbents based on silica gel (SiO<sub>2</sub>) impregnated with deep eutectic solvents (DESs) to increase benzene, toluene, ethylbenzene, and p-xylene (BTEX) adsorption efficiency from gas streams. The DESs were synthesized by means of choline chloride, tetrapropylammonium bromide, levulinic acid, lactic acid, and phenol. The physico-chemical properties of new sorbent materials, including surface morphology and structures, as well as porosity, were studied by means of thermogravimetric analysis, Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and Brunauer–Emmett–Teller analysis. The effect of DESs type, flow rate, and initial concentration of BTEX were also investigated followed by regeneration and reusability of adsorbents. The results indicate that SiO<sub>2</sub> impregnated with tetrapropylammonium bromide and lactic acid in a 1:2 molar ratio have great potential for the removal of BTEX from gas streams. Its adsorption capacity was higher than the pure SiO<sub>2</sub> and other developed SiO<sub>2</sub>-DES adsorbents. This result can be explained by the specific interaction between DESs and BTEX, i.e., hydrogen bonds interaction. |
| first_indexed | 2024-03-10T20:23:54Z |
| format | Article |
| id | doaj.art-1b82edd488e84266a4ce0afdbc804f86 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T20:23:54Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-1b82edd488e84266a4ce0afdbc804f862023-11-19T21:55:41ZengMDPI AGMaterials1996-19442020-04-01138189410.3390/ma13081894Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas StreamsPatrycja Makoś0Edyta Słupek1Aleksandra Małachowska2Department of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdansk University of Technology, G. Narutowicza St. 11/12, 80–233 Gdansk, PolandDepartment of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdansk University of Technology, G. Narutowicza St. 11/12, 80–233 Gdansk, PolandDepartment of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdansk University of Technology, G. Narutowicza St. 11/12, 80–233 Gdansk, PolandThe paper presents the preparation of new adsorbents based on silica gel (SiO<sub>2</sub>) impregnated with deep eutectic solvents (DESs) to increase benzene, toluene, ethylbenzene, and p-xylene (BTEX) adsorption efficiency from gas streams. The DESs were synthesized by means of choline chloride, tetrapropylammonium bromide, levulinic acid, lactic acid, and phenol. The physico-chemical properties of new sorbent materials, including surface morphology and structures, as well as porosity, were studied by means of thermogravimetric analysis, Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and Brunauer–Emmett–Teller analysis. The effect of DESs type, flow rate, and initial concentration of BTEX were also investigated followed by regeneration and reusability of adsorbents. The results indicate that SiO<sub>2</sub> impregnated with tetrapropylammonium bromide and lactic acid in a 1:2 molar ratio have great potential for the removal of BTEX from gas streams. Its adsorption capacity was higher than the pure SiO<sub>2</sub> and other developed SiO<sub>2</sub>-DES adsorbents. This result can be explained by the specific interaction between DESs and BTEX, i.e., hydrogen bonds interaction.https://www.mdpi.com/1996-1944/13/8/1894deep eutectic solventssilica geladsorption |
| spellingShingle | Patrycja Makoś Edyta Słupek Aleksandra Małachowska Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas Streams Materials deep eutectic solvents silica gel adsorption |
| title | Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas Streams |
| title_full | Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas Streams |
| title_fullStr | Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas Streams |
| title_full_unstemmed | Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas Streams |
| title_short | Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas Streams |
| title_sort | silica gel impregnated by deep eutectic solvents for adsorptive removal of btex from gas streams |
| topic | deep eutectic solvents silica gel adsorption |
| url | https://www.mdpi.com/1996-1944/13/8/1894 |
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