Effect of Bimetallic-Activated Carbon Impregnation on Adsorption–Desorption Performance for Hydrogen Sulfide (H<sub>2</sub>S) Capture
This study reports on the impregnation of bi-metallic adsorbents based on commercial coconut activated carbon (CAC), surface-modified with metal acetate (ZnAc<sub>2</sub>), metal oxide (ZnO and TiO<sub>2</sub>), and the basic compound potassium hydroxide (KOH). The morphology...
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MDPI AG
2022-08-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/15/5409 |
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| author | Nurul Noramelya Zulkefli Loshinni S. Mathuray Veeran Adam Mohd Izhan Noor Azam Mohd Shahbudin Masdar Wan Nor Roslam Wan Isahak |
| author_facet | Nurul Noramelya Zulkefli Loshinni S. Mathuray Veeran Adam Mohd Izhan Noor Azam Mohd Shahbudin Masdar Wan Nor Roslam Wan Isahak |
| author_sort | Nurul Noramelya Zulkefli |
| collection | DOAJ |
| description | This study reports on the impregnation of bi-metallic adsorbents based on commercial coconut activated carbon (CAC), surface-modified with metal acetate (ZnAc<sub>2</sub>), metal oxide (ZnO and TiO<sub>2</sub>), and the basic compound potassium hydroxide (KOH). The morphology of the adsorbents was then characterized with SEM-EDX, the microporosity was determined using Brunauer–Emmett–Teller (BET) analysis, the thermal stability was investigated via thermogravity analysis (TGA), and functional group analysis was undertaken with Fourier-transform infrared (FTIR) spectroscopy. These modified adsorbents were subjected to a real adsorption test for H<sub>2</sub>S capture using a 1 L adsorber with 5000 ppm H<sub>2</sub>S balanced for N<sub>2</sub>, with temperature and pressure maintained at an ambient condition. Adsorption–desorption was carried out in three cycles with the blower temperature varied from 50 °C to 150 °C as the desorption condition. Characterization results revealed that the impregnated solution homogeneously covered the adsorbent surface, effecting the morphology and properties. Based on this study, it was found that ZnAc<sub>2</sub>/TiO<sub>2</sub>/CAC_DCM showed a significant increase in adsorption capacity with the different temperatures applied for the desorption in the second cycle: 1.67 mg H<sub>2</sub>S/g at 50 °C, 1.84 mg H<sub>2</sub>S/g at 100 °C, and 1.96 mg H<sub>2</sub>S/g at 150 °C. ZnAc<sub>2</sub>/ZnO/CAC_DCM seemed to produce the lowest percentage of degradation in the three cycles for all the temperatures used in the adsorption–desorption process. Therefore, ZnAc<sub>2</sub>/ZnO/CAC_DCM has the potential to be used and commercialized for biogas purification for H<sub>2</sub>S removal. |
| first_indexed | 2024-03-09T10:07:09Z |
| format | Article |
| id | doaj.art-245d7265c110490db9e98b298f675e67 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T10:07:09Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-245d7265c110490db9e98b298f675e672023-12-01T23:01:30ZengMDPI AGMaterials1996-19442022-08-011515540910.3390/ma15155409Effect of Bimetallic-Activated Carbon Impregnation on Adsorption–Desorption Performance for Hydrogen Sulfide (H<sub>2</sub>S) CaptureNurul Noramelya Zulkefli0Loshinni S. Mathuray Veeran1Adam Mohd Izhan Noor Azam2Mohd Shahbudin Masdar3Wan Nor Roslam Wan Isahak4Department of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, MalaysiaDepartment of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, MalaysiaFuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, MalaysiaDepartment of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, MalaysiaDepartment of Chemical & Process Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Selangor, MalaysiaThis study reports on the impregnation of bi-metallic adsorbents based on commercial coconut activated carbon (CAC), surface-modified with metal acetate (ZnAc<sub>2</sub>), metal oxide (ZnO and TiO<sub>2</sub>), and the basic compound potassium hydroxide (KOH). The morphology of the adsorbents was then characterized with SEM-EDX, the microporosity was determined using Brunauer–Emmett–Teller (BET) analysis, the thermal stability was investigated via thermogravity analysis (TGA), and functional group analysis was undertaken with Fourier-transform infrared (FTIR) spectroscopy. These modified adsorbents were subjected to a real adsorption test for H<sub>2</sub>S capture using a 1 L adsorber with 5000 ppm H<sub>2</sub>S balanced for N<sub>2</sub>, with temperature and pressure maintained at an ambient condition. Adsorption–desorption was carried out in three cycles with the blower temperature varied from 50 °C to 150 °C as the desorption condition. Characterization results revealed that the impregnated solution homogeneously covered the adsorbent surface, effecting the morphology and properties. Based on this study, it was found that ZnAc<sub>2</sub>/TiO<sub>2</sub>/CAC_DCM showed a significant increase in adsorption capacity with the different temperatures applied for the desorption in the second cycle: 1.67 mg H<sub>2</sub>S/g at 50 °C, 1.84 mg H<sub>2</sub>S/g at 100 °C, and 1.96 mg H<sub>2</sub>S/g at 150 °C. ZnAc<sub>2</sub>/ZnO/CAC_DCM seemed to produce the lowest percentage of degradation in the three cycles for all the temperatures used in the adsorption–desorption process. Therefore, ZnAc<sub>2</sub>/ZnO/CAC_DCM has the potential to be used and commercialized for biogas purification for H<sub>2</sub>S removal.https://www.mdpi.com/1996-1944/15/15/5409H<sub>2</sub>S removaladsorption–desorptionbiogas purificationadsorbent |
| spellingShingle | Nurul Noramelya Zulkefli Loshinni S. Mathuray Veeran Adam Mohd Izhan Noor Azam Mohd Shahbudin Masdar Wan Nor Roslam Wan Isahak Effect of Bimetallic-Activated Carbon Impregnation on Adsorption–Desorption Performance for Hydrogen Sulfide (H<sub>2</sub>S) Capture Materials H<sub>2</sub>S removal adsorption–desorption biogas purification adsorbent |
| title | Effect of Bimetallic-Activated Carbon Impregnation on Adsorption–Desorption Performance for Hydrogen Sulfide (H<sub>2</sub>S) Capture |
| title_full | Effect of Bimetallic-Activated Carbon Impregnation on Adsorption–Desorption Performance for Hydrogen Sulfide (H<sub>2</sub>S) Capture |
| title_fullStr | Effect of Bimetallic-Activated Carbon Impregnation on Adsorption–Desorption Performance for Hydrogen Sulfide (H<sub>2</sub>S) Capture |
| title_full_unstemmed | Effect of Bimetallic-Activated Carbon Impregnation on Adsorption–Desorption Performance for Hydrogen Sulfide (H<sub>2</sub>S) Capture |
| title_short | Effect of Bimetallic-Activated Carbon Impregnation on Adsorption–Desorption Performance for Hydrogen Sulfide (H<sub>2</sub>S) Capture |
| title_sort | effect of bimetallic activated carbon impregnation on adsorption desorption performance for hydrogen sulfide h sub 2 sub s capture |
| topic | H<sub>2</sub>S removal adsorption–desorption biogas purification adsorbent |
| url | https://www.mdpi.com/1996-1944/15/15/5409 |
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