Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries, Kunming University of Science and Technology, Kunming 650500, China.
J Environ Sci (China). 2025 May;151:161-173. doi: 10.1016/j.jes.2024.02.035. Epub 2024 Mar 22.
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.
本研究采用湿浸渍法合成了五种硅铝比分别为 25、50、85、200 和 300 的 Cu/HZSM-5 吸附剂，用于去除低温、低氧环境中的 H2S。考察了不同硅铝比对 Cu/HZSM-5-85 吸附剂吸附氧化性能的影响。根据性能测试结果，Cu/HZSM-5-85 表现出最高的穿透容量，达到 231.75mg H2S/g。Cu/HZSM-5 吸附剂即使在潮湿条件下仍保持较强的去除 H2S 能力，表现出优异的耐水性。XRD、BET 和 XPS 结果表明，CuO 是主要的活性物种，Cu/HZSM-5-85 具有最大的比表面积和最高的 CuO 含量，为 H2S 吸附提供了更多的活性位。H-TPR 和 O-TPD 结果证实，Cu/HZSM-5-85 吸附剂具有优异的氧化还原性能和储氧能力，有助于在分子筛吸附-氧化过程中实现优异的氧传递能力。具有大的比表面积、高脱硫效率和耐水性等特点，Cu/HZSM-5-85 吸附剂在工业应用中具有重要意义。
