Effect of Cu/HZSM-5 sorbents with different Si/Al ratios on the adsorption and oxidation performance of H_(2)S  

作　　者：Kaini Ma Kai Li Ping Ning Jiayu Feng Jiacheng Bao Lei Shi Xiangyu Wang Xin Sun 

机构地区：[1]Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China [2]National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries,Kunming University of Science and Technology,Kunming 650500,China

出　　处：《Journal of Environmental Sciences》2025年第5期161-173,共13页环境科学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.52270106 and 22266021);Yunnan Major Scientific and Technological Projects(No.202202AG050005);Yunnan Fundamental Research Projects(No.202201AT070116).

摘　　要：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 H_(2)S in lowtemperature,low-oxygen environments.The impact of different Si/Al ratios on the adsorption oxidative performance of Cu_(30)/HZSM-5–85 adsorbents was investigated.According to the performance test results,Cu_(30)/HZSM-5–85 exhibited the highest breakthrough capacity,reaching 231.75 mg H_(2)S/g_(sorbent).Cu/HZSM-5 sorbent maintains a strong ability to remove H_(2)S even under humid conditions and shows excellent water resistance.XRD,BET,and XPS results revealed that CuO is the primary active species,with Cu_(30)/HZSM-5–85 having the largest surface area and highest CuO content,providing more active sites for H_(2)S adsorption.H_(2)-TPR and O_(2)-TPD results confirmed that Cu_(30)/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_(30)/HZSM-5–85 sorbents hold significant importance for industrial applications.

关 键 词：H_(2)S Si/Al ratio Adoration-oxidation Cu/HZSM-5-85(HZSM-5 with Si/Al ratio of 85 loaded Cu) 

分 类 号：O64[理学—物理化学]