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- Title
Adsorption–Desorption Behavior of Hydrogen Sulfide Capture on a Modified Activated Carbon Surface.
- Authors
Zulkefli, Nurul Noramelya; Noor Azam, Adam Mohd Izhan; Masdar, Mohd Shahbudin; Isahak, Wan Nor Roslam Wan
- Abstract
Metal-based adsorbents with varying active phase loadings were synthesized to capture hydrogen sulfide (H2S) from a biogas mimic system. The adsorption–desorption cycles were implemented to ascertain the H2S captured. All prepared adsorbents were evaluated by nitrogen adsorption, Brunauer–Emmett–Teller surface area analysis, scanning electron microscopy–energy-dispersive X-ray spectroscopy, and Fourier transform infrared spectroscopy. From the results, modified adsorbents, dual chemical mixture (DCM) and a core–shell (CS) had the highest H2S adsorption performance with a range of 0.92–1.80 mg H2S/g. After several cycles of heat/N2 regeneration, the total H2S adsorption capacity of the DCM adsorbent decreased by 62.1%, whereas the CS adsorbent decreased by only 25%. Meanwhile, the proposed behavioral model for H2S adsorption–desorption was validated effectively using various analyses throughout the three cycles of adsorption–desorption samples. Moreover, as in this case, the ZnAc2/ZnO/CAC_OS adsorbents show outstanding performances with 30 cycles of adsorption–desorption compared to only 12 cycles of ZnAc2/ZnO/CAC_DCM. Thus, this research paper will provide fresh insights into adsorption–desorption behavior through the best adsorbents' development and the adsorbents' capability at the highest number of adsorption–desorption cycles.
- Subjects
HYDROGEN sulfide; FOURIER transform infrared spectroscopy; ADSORPTION capacity; SURFACE analysis; ACTIVATED carbon
- Publication
Materials (1996-1944), 2023, Vol 16, Issue 1, p462
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma16010462