Microporous and Mesoporous Materials最新文献

{"title":"A systematic investigation of synthesis conditions on the silanol defects of silicalite-1","authors":"Qiao Yu ,&nbsp;Tao Wang ,&nbsp;Zhilin Chen,&nbsp;Chao Xiao","doi":"10.1016/j.micromeso.2025.114020","DOIUrl":"10.1016/j.micromeso.2025.114020","url":null,"abstract":"<div><div>Understanding of the main factors affecting the silanol defects (Si–OH) of zeolite is vital for its catalysis and adsorption properties. Taking silicalite-1 (MFI) as an example, a systematic investigation of synthesis temperature, TPAOH addition, ethanol addition, and K addition on the silanol defects of silicalite-1 was conducted using pure reagents excluding the effect of metal impurities. Silicalite-1 synthesized form pure tetraethyl orthosilicate (TEOS) and tetrapropylammonium hydroxide (TPAOH) contains a relatively high concentration of silanol nests with a Q³/Q⁴ ratio of 10.0% in the ²⁹Si MAS NMR spectra. The introduction of trace alkali metal ions above 0.02 mol% effectively reduces the defect concentration of silicalite-1. Moreover, the effect of K reaches a plateau as K/Si ratio beyond 0.2 mol% does not lead to further reduction of structural defects. Lowering the synthesis temperature to 125 °C results in smaller crystal sizes, irregular morphologies, and a slight decrease in silanol nests. Decrease of the TPAOH amount increases the crystal size from 139 nm to 224 nm, but has little effect on the silanol defect concentration. Ethanol from controlled addition reduces the silanol defects somewhat.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114020"},"PeriodicalIF":4.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-diffusion and permeability of methane, carbon dioxide, and their mixture in zeolite: Cage effect, fluid redistribution, and nanosegregation","authors":"Loriane Didier ,&nbsp;Alan Sam ,&nbsp;Cecilia Herrero ,&nbsp;Rodolfo Venegas ,&nbsp;Benoit Coasne","doi":"10.1016/j.micromeso.2025.114021","DOIUrl":"10.1016/j.micromeso.2025.114021","url":null,"abstract":"<div><div>Equilibrium and non-equilibrium molecular dynamics simulations are used to decipher the mechanisms that rule the diffusion and permeability of pure fluids and mixtures inside a cage-like nanoporous material. In more detail, we consider the case of methane, carbon dioxide and their mixture within the RHO zeolite – which is made up of nanometric cages connected by narrow subnanometric windows. The fluid molecular structure is found to significantly affect both the self and collective dynamics; while carbon dioxide (CO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>) transport slows down in a monotonous fashion upon increasing the fluid adsorbed amount <span><math><msub><mrow><mi>n</mi></mrow><mrow><mi>a</mi></mrow></msub></math></span>, methane (CH<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span>) transport displays a non-monotonous behavior upon increasing <span><math><msub><mrow><mi>n</mi></mrow><mrow><mi>a</mi></mrow></msub></math></span>. We identify that such differences arise from the fluid organization within the nanoporosity which strongly affects the characteristic caging time (or equivalently the transfer rate through the narrow windows). In particular, we show that the increase in the self-diffusivity for CH<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> at large <span><math><msub><mrow><mi>n</mi></mrow><mrow><mi>a</mi></mrow></msub></math></span> arises from the fluid redistribution within the zeolite cages and windows. Upon investigating mixture transport as induced by a chemical potential gradient (or equivalently a pressure gradient), we find that local segregation of the mixture components significantly affects the induced flow. While a homogeneous flow is observed in the case of fully miscible mixtures, immiscible mixtures exhibit a marked different behavior as the two fluid components respond differently to the applied driving force. We show that such finding can be rationalized using a simple thermodynamic model based on the Gibbs-Duhem equation combined with Stokes equation for momentum conservation.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114021"},"PeriodicalIF":4.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145921901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low-cost organosilane-assisted synthesis of hierarchical SAPO-34 with improved stability in methanol-to-olefins reaction","authors":"Panpan Zhai ,&nbsp;Yapeng Li ,&nbsp;Zhipan Liu ,&nbsp;Zhanling Ma ,&nbsp;Dehua Wang ,&nbsp;Beibei Gao","doi":"10.1016/j.micromeso.2025.114003","DOIUrl":"10.1016/j.micromeso.2025.114003","url":null,"abstract":"<div><div>A series of hierarchical SAPO-34 molecular sieves were successfully synthesized through the organosilane-assisted method, employing low-cost 3-aminopropyltriethoxysilane (APTES) as a mesoporous template and partial silica source. The influence of APTES content on the crystallinity, pore structures, acidity, and catalytic performance of the products in the methanol-to-olefins (MTO) reaction was systematically investigated by XRD, XRF, SEM, N₂ adsorption-desorption, NH₃-TPD measurements and a fixed-bed reactor. It revealed that the introduction of APTES created mesopores and simultaneously modulated the acidic properties, notably reducing both the strength and density of strong acid sites. Compared to the conventional microporous SAPO-34-C, the hierarchical SAPO-34 catalysts, particularly SAPO-34-0.1, demonstrated a superior catalytic lifetime and enhanced selectivity to light olefins in the MTO reaction. This performance enhancement could be attributed to their hierarchical pore systems and the moderated acidities. However, excessive APTES addition (SAPO-34-0.2) led to a decline in crystallinity and a consequent reduction in catalytic stability.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114003"},"PeriodicalIF":4.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145838953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pyridine-based hyper-crosslinked ionic polymers with high ionic density: One-pot synthesis and application in efficient CO2 conversion","authors":"Xu Liao ,&nbsp;Shuai Liu ,&nbsp;Xianmin Kuang ,&nbsp;Yingwei Zhou ,&nbsp;Quanan Xiao ,&nbsp;Baiqing Chen ,&nbsp;Jiao He ,&nbsp;Jinqing Lin","doi":"10.1016/j.micromeso.2025.114016","DOIUrl":"10.1016/j.micromeso.2025.114016","url":null,"abstract":"<div><div>To overcome the low catalytic efficiency in CO₂ cycloaddition resulting from the limited ionic density of hyper-crosslinked ionic polymers (HIPs) prepared via in situ ionic site generation during hyper-crosslinking, we developed a one-pot synthesis approach for pyridine-based HIPs by reacting 4-phenylpyridine or 4-benzylpyridine with 1,4-bis(bromomethyl)benzene. The results revealed that the polymers synthesized using 4-benzylpyridine exhibited a higher nitrogen content and ionic density compared to that derived from 4-phenylpyridine. Notably, [HBPR]Br-1 achieved the highest nitrogen content (2.37 wt%) and theoretical ionic density (1.69 mmol g⁻¹) when synthesized with an equimolar ratio of 4-benzylpyridine and 1,4-bis(bromomethyl)benzene. Owing to its high ionic density, [HBPR]Br-1 displayed good catalytic activity, affording a 96 % yield in the CO₂/styrene oxide cycloaddition at 100 °C, 0.5 MPa CO₂ in 10 h without the need for co-catalysts. Furthermore, a series of catalytic tests confirmed its competitive substrate compatibility, cyclic stability and practicability. Remarkably, [HBPR]Br-1 maintained high catalytic performance in simulated flue gas, achieving a 95 % yield of styrene carbonate at 100 °C and 0.5 MPa in 24 h. This work introduces a new one-pot approach for preparing pyridine-based HIPs featuring high ionic density and highlights the crucial impact of ionic density on enhancing catalytic efficiency in CO₂ cycloaddition.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114016"},"PeriodicalIF":4.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145838954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption behavior and immobilization mechanism of typical heavy metals in synthetic C-A-S-H gels","authors":"Baomin Wang,&nbsp;Haoxiang Yang,&nbsp;Chengcheng Fan,&nbsp;Fei Liu,&nbsp;Wenxin Lu","doi":"10.1016/j.micromeso.2026.114030","DOIUrl":"10.1016/j.micromeso.2026.114030","url":null,"abstract":"<div><div>Alkali-activated materials show excellent capture capacity on heavy metals, but the mechanisms to immobilize heavy metals remain inadequately explored. This work investigated the main hydration product C-A-S-H gels for encapsulation of heavy metals such as Pb(II), Zn(II) and Cd(II). Furthermore, the adsorption behavior and mechanisms of Pb(II) in pore solutions by C-A-S-H were examined. These findings reveal that aluminum is incorporated into the silicon chains of C-S-H in the form of aluminum-oxygen tetrahedra, thereby generating C-A-S-H. The bonding ratio, which depends on the Ca/Si ratio, reaches its peak value of 0.139 when the Ca/Si ratio is 0.9. In highly alkaline environments, amphoteric Pb(II) and Zn(II) form hydroxyl coordination polyhedra, enhancing silicon chain polymerization, whereas Cd(II) is immobilized via ion exchange with Ca(II), resulting in solid solutions. For C-A-S-H with a Ca/Si ratio of 0.6, Pb(II) adsorption occurs predominantly through physical interactions. However, as the Ca/Si molar ratio increases, the effect chemisorption and ion exchange become more significant along with the formation of Pb₈Ca(Si₂O₇)₃. C-A-S-H gel with a Ca/Si ratio of 0.9 has the highest Pb(II) adsorption capacity, reaching 92.55 mg/g.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114030"},"PeriodicalIF":4.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145921897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adaptive per-hydroxy pillar[5]arene-based frameworks for selective CO2 adsorption under humid conditions","authors":"John Senith Ravishan Fernando ,&nbsp;Venkatesh Bollabathini ,&nbsp;Quoc Duy Ho ,&nbsp;Kåre B. Jørgensen ,&nbsp;Eva Rauls ,&nbsp;Sachin Maruti Chavan","doi":"10.1016/j.micromeso.2025.114022","DOIUrl":"10.1016/j.micromeso.2025.114022","url":null,"abstract":"<div><div>This study presents a systematic investigation of <em>per</em>-hydroxy pillar[5]arene (P[5]A-OH) -based Supramolecular Organic Frameworks for CO₂ adsorption. The research emphasizes the critical roles of recrystallization and activation processes in transforming P[5]A-OH into a porous structure conducive to efficient CO₂ uptake. The water vapour adsorption and adsorption cyclability for CO₂ under dry and humid conditions are reported for the first time for P[5]A-OH. The material exhibited a CO₂ adsorption capacity of 2.16 mmol g⁻¹ at 298 K and 1 bar, with CO₂/N₂ IAST selectivity of 72 and excellent structural and CO₂ adsorption cyclic stability under dry and humid conditions, highlighting its potential as a robust and cyclable adsorbent for CO₂ separation.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114022"},"PeriodicalIF":4.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145921899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ce-impregnated acid functionalized mesoporous silica as catalyst for ethanol dehydration to ethylene","authors":"Oksana Dudarko ,&nbsp;Veronika Tomina ,&nbsp;Natalia Kobylinska ,&nbsp;Dorota Duraczyńska ,&nbsp;Katarzyna Pamin ,&nbsp;Ewa Serwicka ,&nbsp;Gulaim Seisenbaeva","doi":"10.1016/j.micromeso.2025.114006","DOIUrl":"10.1016/j.micromeso.2025.114006","url":null,"abstract":"<div><div>The catalytic performance of Ce-containing mesoporous silica, functionalized with phenylsulfonic and phenylsulfonic/phosphonic acid groups, was studied for the ethanol dehydration to ethylene reaction in the temperature range of 250 °C–500 °C. The SBA-15-type materials were prepared using a ‘one-pot’ hydrothermal method, and for comparison, the performance of a silica gel with grafted alkylsulfonic groups was also studied. The initial silica supports and Ce-containing catalysts were characterized by XRD, XPS, TEM, SEM/EDX, TGA, zeta potential measurements, etc. The characterization results showed that the morphology, structure, thermal and textural parameters of the catalysts remained largely unchanged following the impregnation of 0.1 M Ce³⁺ ions. The nature, amount, and availability of acid groups in the mesoporous framework were identified as key factors influencing the metal-impregnation process. According to DRIFT-IR spectroscopy, the functionalization with sulfonic groups binding Ce³⁺ ions led to the generation of Brønsted (B) and Lewis (L) acid sites, respectively. Importantly, the thermal stability analysis revealed that the number of strong B-sites rapidly diminished during desorption up to 500 °C, resulting in a notable decrease in the B/L ratio after treatment at high temperatures. At the same time, ethanol conversion and selectivity towards ethylene were found to augment with increased reaction temperature to 500 °C. The SBA/PhSO₃H/Ce catalyst demonstrated superior overall performance, characterized by high ethanol conversion (95 %) and the most favourable kinetic profile, including the lowest activation energy (48.2 kJ/mol) among all materials. In contrast, the Ce-containing SiO₂SO₃H/Ce catalyst exhibited the highest TON (5223.6 per hour), indicating superior intrinsic efficiency per active site. The reusability of the obtained catalysts in terms of stability and conversion was explained using a range of instrumental methods.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114006"},"PeriodicalIF":4.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Removal of low concentration manganese in surface drinking water sources by chitosan-modified zeolite: performance and mechanism","authors":"Ru Tian ,&nbsp;Hengfan Yao ,&nbsp;Yanping Huang ,&nbsp;Qingguo Wang","doi":"10.1016/j.micromeso.2025.114023","DOIUrl":"10.1016/j.micromeso.2025.114023","url":null,"abstract":"<div><div>The removal of low concentration of manganese (Mn(II)) from surface water poses a challenge in drinking water treatment. This study developed a chitosan-modified zeolite (CMZ) to effectively adsorb Mn(II) at low concentrations (e.g., 0.255 mg/L). Characterization revealed that CMZ possessed a specific surface area 22.4 times larger than artificial zeolite, and thermogravimetric analysis quantified the chitosan loading at 14.85 wt%, confirming successful modification. The amino and hydroxyl groups served as the primary adsorption sites. CMZ performed effectively over a wide pH range (5–8), and its efficiency was largely unaffected by common coexisting ions, except for Ca²⁺. Adsorption kinetics and isotherms were well-described by the pseudo-second-order and Langmuir models, respectively, indicating a chemisorption-dominated, monolayer process. The mechanism involved both ion exchange and surface complexation. These findings demonstrate that CMZ is a highly promising adsorbent for removing low concentration of Mn(II) from drinking water sources.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114023"},"PeriodicalIF":4.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145881886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced sodium removal from single-component solutions, groundwater and anodizing wastewater using NH4Cl-modified mexican natural zeolites","authors":"Andrea Alejandra Acosta-Herrera ,&nbsp;Virginia Hernández-Montoya ,&nbsp;Miguel A. Montes-Morán ,&nbsp;Yessenia de Lara Ramos ,&nbsp;Paola Sarahí De Velasco-Maldonado","doi":"10.1016/j.micromeso.2025.114005","DOIUrl":"10.1016/j.micromeso.2025.114005","url":null,"abstract":"<div><div>In this study, two natural Mexican clinoptilolites (ZN-SLP and ZN-SON) were modified to significantly enhance their cation-exchange properties, making them attractive low-cost materials for Na ⁺ removal from groundwater and anodizing wastewater. The modification includes a chemical treatment with NH₄Cl and subsequently, a thermal-microwave treatment. A Taguchi experimental design was applied to identify optimal modification conditions, and the samples were used in Na⁺ adsorption studies employing single component solutions in batch systems. The most efficient modified zeolites were employed in the adsorption of Na⁺ from groundwater and anodizing wastewater. The results with single component solutions are indicating that the chemical–thermal-radiation modification increased the Na⁺ adsorption capacity of ZN-SLP from 2.05 to 11.86 mg/g and from 3.65 to 15.92 mg/g for ZN-SON. This behavior can be associated with the chemical and physical characteristics of zeolites with and without modification, where the surface characterization revealed that modification decreased the pH_PZC of ZN-SLP from 4.74 to 4.63 and from 4.91 to 4.53 for ZN-SON and consequently, the acidity of zeolites increased after the modification. FT-IR spectra revealed enhanced hydroxylation and framework distortion after treatment and the SEM images confirmed increased surface roughness and microfracturing. Also, textural analysis showed that for ZN-SLP the BET surface area increases from 16.0 to 20.6 m²/g after modification and for ZN-SON decreased slightly from 10.1 to 9.4 m²/g. Finally, it is very important to note that in real matrices (groundwater and anodizing wastewater), Na⁺ adsorption decreased due to ionic competition: from 12.0 to 6.7 mg/g for (ZN-SLP-OP) and from 16.0 to 9.3 mg/g (ZN-SON-OP) in anodizing wastewater, and 6.7–9.6 mg/g in well waters, yet removal efficiencies consistently remained above 26 %. Additionally, significant co-removal of SO₄²⁻ (up to 80 %), PO₄³⁻ (92–99 %), and NO₃⁻ (up to 73 %) was observed depending on the matrix, while F⁻ removal ranged from 6 to 45 %. These results demonstrate that modified Mexican zeolites retain structural stability and exhibit robust performance under complex ionic conditions, confirming their potential as cost-effective, scalable adsorbents for Na⁺ removal in both synthetic and real water systems.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"403 ","pages":"Article 114005"},"PeriodicalIF":4.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145789884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tunable selective adsorption and efficient purification of propylene on a series of mesoporous metal-organic frameworks","authors":"Anna A. Lysova,&nbsp;Konstantin A. Kovalenko,&nbsp;Anton S. Nizovtsev,&nbsp;Danil N. Dybtsev,&nbsp;Vladimir P. Fedin","doi":"10.1016/j.micromeso.2025.113993","DOIUrl":"10.1016/j.micromeso.2025.113993","url":null,"abstract":"<div><div>C₃H₆ adsorption on a family of <strong>NIIC-20-G</strong> (G = glycol) MOFs is carried out. The C₃H₆ adsorption capacities at 1 bar vary from 109.3 to 168 ml⋅g⁻¹ (273 K) and from 74.2 to 113.3 ml⋅g⁻¹ (298 K), depending on the nature of G. The following highest IAST adsorption selectivity values (<em>S</em>) are obtained at 298 K, 1:1 gas mixture, 1 bar: <em>S</em>(C₃H₆/CO₂) = 7.4, <em>S</em>(C₃H₆/CH₄) = 587.0, <em>S</em>(C₃H₆/C₂H₆) = 4.4, <em>S</em>(C₃H₆/C₂H₄) = 7.0, <em>S</em>(C₃H₈/C₃H₆) = 2.1. The isosteric heats of the C₃H₆ adsorption range from 32.4 to 38.0 kJ∙mol⁻¹, which are lower than that of C₃H₈, suggesting enthalpy-driven preferential adsorption of propane over propylene. Theoretical DFT and GCMC calculations support the experimental results and provide more detailed information on the nature of adsorption centers of propane and propylene molecules. Multiple breakthrough separation experiments are carried out for <strong>NIIC-20-Pr</strong> (Pr = propyleneglycol) using different C₃H₆/C₂H₄ and C₃H₈/C₃H₆ gas mixtures. The productivity of ethylene ranges from 2.60 to 2.94 mol∙kg⁻¹, the propylene productivity is 0.56 mol kg⁻¹. Given the remarkable fundamental adsorption characteristics, the <strong>NIIC-20-G</strong> porous materials should be considered among the best solutions for efficient and economically viable separation of industrially important gas mixtures.</div></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":"402 ","pages":"Article 113993"},"PeriodicalIF":4.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}