Y-type zeolite is widely used in the field of desulfurization. Studies have shown that the removal capacity of sulfide in pollutants can be effectively improved by the metal-modified Y-type zeolite adsorbents obtained by metal ion exchange. However, due to thefact that the Y-type zeolite has three different size structures: supercage, sodalite cage and hexagonal prism cage, larger sulfides can onlybe adsorbed and removed by entering the supercage according to the size selectivity. Therefore, it is very important to improve its adsorption performance by analyzing and controling the location of metal ions in Y-type zeolite. In this paper, the location control methods andanalytical methods of metal ions in Y-type zeolite were summarized. The effects of the size of metal complexes, the calcination temperatureand atmosphere during the preparation of zeolite, and the introduction methods of metal species on the position of metal ions in Y-type zeolite were summarized. The progress of characterization methods such as X-ray diffraction analysis (XRD), Rietveld structure refinement,in situ infrared spectroscopy (FTIR and Py-FTIR), and electron paramagnetic resonance ( EPR) in analyzing the micro positioningof metals in Y-type zeolite cages was reviewed. The effective methods for characterizing the various metal species loaded on Y-type zeolitewere analyzed. The size of metal complexes can be adjusted by complexing metal ions with organic complexes so that they can enter moreinto the supercages during the ion exchange process, achieving the purpose of regulating the location of metals in different cages of Y-typezeolite. The dehydration of hydrated metal ions caused by high temperature calcination is transfered from Y-type zeolite supercages to sodalite cages. The location of metal ions can be controled by changing the calcination temperature. The calcination atmosphere will affect thevalence state of the metal ions. The metal oxides obtained by calcination in the air atmosphere are prone to deposit and block the pores,hindering the migration of the metal ions. Some metal ions can be also reduced due to the calcination under nitrogen atmosphereand change the active components on the zeolite. The appropriate calcination temperature and atmosphere can affect the placement of metalions in the Y - type zeolite cage. The introduction method of metal species will affect its distribution inside and outside the Y - typezeolite cage, and regulate its location in each cage of the Y-type zeolite. Y-type zeolite sieves have broad application prospects in the fieldof adsorption separation and catalysis, in which metal modification is a commonly used means to enhance the performance of Y-type zeolite sieves. In order to enhance the utilization rate of metal ions and increase the metal active sites, it is necessary to combine with suitableand analytical methods to clarify the migration law of metal ions in Y-type zeolite sieves under different preparation conditions. Further attention is focused on how to inhibit the migration of metal ions in the Y-type zeolite supercage under high temperature calcination, ensuring that more metal species are localized in the supercage. The mechanism by which the mode of introduction of metal species affectstheir colonization is unclear, and further research is needed. The methods for resolving the fall of metal ions in different cages of Y-typezeolite sieves are not intuitive, and some methods are controversial and need to be further explored and investigated.

赵晋川(1997—),男,山西阳泉人,硕士研究生。E-mail:2933477302@qq.com

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ZHAO Jinchuan,WEN Zhihui,WANG Jingjing,et al.Research progress on regulation and analytical methods of metal ionlocation in Y-type zeolite[J].Clean Coal Technology,2023,29(11):74-82.