Maryam Rashtchi , Ali Haghighi Asl , Jafar Towfighi Darian , Saeed Soltanali
{"title":"二元离子交换 ETS-4(Sr/Ba-ETS-4):合成、表征和选择性吸附甲烷中的氮以净化天然气","authors":"Maryam Rashtchi , Ali Haghighi Asl , Jafar Towfighi Darian , Saeed Soltanali","doi":"10.1016/j.micromeso.2024.113139","DOIUrl":null,"url":null,"abstract":"<div><p>Several variants of ETS-4 were synthesized through single-cation and binary-cation exchange, with a particular emphasis on Sr/Ba-ETS-4. The impact of binary-cation exchange on the structural characteristics was investigated using various analytical techniques, including XRD, FESEM, EDX, ICP-MS, TGA, and FT-IR analysis. The effect of mixed Sr and Ba exchange within ETS-4 on the adsorption, separation, and kinetic behavior of nitrogen and methane gases was explored utilizing the volumetric method at 30 °C and up to 100 kPa. Additionally, the investigation extended to examining the influence on diffusion coefficients employing the macropore-micropore kinetic model. ICP-MS results revealed a competitive advantage of barium in the exchange process among incoming cations. Notably, significant discrepancies in the adsorption capacity for nitrogen and methane gases were observed between the Sr-ETS-4 and Ba-ETS-4 samples. Experimental isotherm data suggested that the Sips model offered the most suitable fit, unlike the Langmuir or Freundlich models. Among the Sr/Ba-ETS-4 adsorbents investigated, the adsorbent with the highest barium content in the framework exhibited superior nitrogen adsorption capacity (0.33 mmol/g) and the lowest methane adsorption capacity (0.07 mmol/g), leading to high nitrogen over methane equilibrium selectivity (3.12) and kinetic selectivity (167.6).</p></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Binary ion-exchanged ETS-4 (Sr/Ba-ETS-4): Synthesis, characterization, and selective nitrogen adsorption from methane for natural gas purification\",\"authors\":\"Maryam Rashtchi , Ali Haghighi Asl , Jafar Towfighi Darian , Saeed Soltanali\",\"doi\":\"10.1016/j.micromeso.2024.113139\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Several variants of ETS-4 were synthesized through single-cation and binary-cation exchange, with a particular emphasis on Sr/Ba-ETS-4. The impact of binary-cation exchange on the structural characteristics was investigated using various analytical techniques, including XRD, FESEM, EDX, ICP-MS, TGA, and FT-IR analysis. The effect of mixed Sr and Ba exchange within ETS-4 on the adsorption, separation, and kinetic behavior of nitrogen and methane gases was explored utilizing the volumetric method at 30 °C and up to 100 kPa. Additionally, the investigation extended to examining the influence on diffusion coefficients employing the macropore-micropore kinetic model. ICP-MS results revealed a competitive advantage of barium in the exchange process among incoming cations. Notably, significant discrepancies in the adsorption capacity for nitrogen and methane gases were observed between the Sr-ETS-4 and Ba-ETS-4 samples. Experimental isotherm data suggested that the Sips model offered the most suitable fit, unlike the Langmuir or Freundlich models. Among the Sr/Ba-ETS-4 adsorbents investigated, the adsorbent with the highest barium content in the framework exhibited superior nitrogen adsorption capacity (0.33 mmol/g) and the lowest methane adsorption capacity (0.07 mmol/g), leading to high nitrogen over methane equilibrium selectivity (3.12) and kinetic selectivity (167.6).</p></div>\",\"PeriodicalId\":392,\"journal\":{\"name\":\"Microporous and Mesoporous Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.8000,\"publicationDate\":\"2024-04-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Microporous and Mesoporous Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1387181124001616\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microporous and Mesoporous Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1387181124001616","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
Binary ion-exchanged ETS-4 (Sr/Ba-ETS-4): Synthesis, characterization, and selective nitrogen adsorption from methane for natural gas purification
Several variants of ETS-4 were synthesized through single-cation and binary-cation exchange, with a particular emphasis on Sr/Ba-ETS-4. The impact of binary-cation exchange on the structural characteristics was investigated using various analytical techniques, including XRD, FESEM, EDX, ICP-MS, TGA, and FT-IR analysis. The effect of mixed Sr and Ba exchange within ETS-4 on the adsorption, separation, and kinetic behavior of nitrogen and methane gases was explored utilizing the volumetric method at 30 °C and up to 100 kPa. Additionally, the investigation extended to examining the influence on diffusion coefficients employing the macropore-micropore kinetic model. ICP-MS results revealed a competitive advantage of barium in the exchange process among incoming cations. Notably, significant discrepancies in the adsorption capacity for nitrogen and methane gases were observed between the Sr-ETS-4 and Ba-ETS-4 samples. Experimental isotherm data suggested that the Sips model offered the most suitable fit, unlike the Langmuir or Freundlich models. Among the Sr/Ba-ETS-4 adsorbents investigated, the adsorbent with the highest barium content in the framework exhibited superior nitrogen adsorption capacity (0.33 mmol/g) and the lowest methane adsorption capacity (0.07 mmol/g), leading to high nitrogen over methane equilibrium selectivity (3.12) and kinetic selectivity (167.6).
期刊介绍:
Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal.
Topics which are particularly of interest include:
All aspects of natural microporous and mesoporous solids
The synthesis of crystalline or amorphous porous materials
The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic
The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions
All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials
Adsorption (and other separation techniques) using microporous or mesoporous adsorbents
Catalysis by microporous and mesoporous materials
Host/guest interactions
Theoretical chemistry and modelling of host/guest interactions
All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.