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Article Abstract
This study employed a wet impregnation method to synthesize five types of Cu/HZSM-5 adsorbents with Si/Al ratios of 25, 50, 85, 200, and 300, used for the removal of HS in low-temperature, low-oxygen environments. The impact of different Si/Al ratios on the adsorption oxidative performance of Cu/HZSM-5-85 adsorbents was investigated. According to the performance test results, Cu/HZSM-5-85 exhibited the highest breakthrough capacity, reaching 231.75 mg HS/g. Cu/HZSM-5 sorbent maintains a strong ability to remove HS even under humid conditions and shows excellent water resistance. XRD, BET, and XPS results revealed that CuO is the primary active species, with Cu/HZSM-5-85 having the largest surface area and highest CuO content, providing more active sites for HS adsorption. H-TPR and O-TPD results confirmed that Cu/HZSM-5-85 sorbent exhibits outstanding redox properties and oxygen storage capacity, contributing to excellent oxygen transferability in the molecular sieve adsorption-oxidation process. With notable characteristics such as a large surface area, high desulfurization efficiency, and water resistance, Cu/HZSM-5-85 sorbents hold significant importance for industrial applications.
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| http://dx.doi.org/10.1016/j.jes.2024.02.035 | DOI Listing |
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