The Ag(I) coordination in Ag-MOF-303 enhanced the adsorption and separation capabilities for H2/D2

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2024-12-20 DOI:10.1016/j.seppur.2024.131219

Zining Wang, Fenglei Wang, Yu Luo, Yiman Liu, Yuanhua Wang, Fan Wang, Yongdong Jin, Chuanqin Xia

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Abstract

As a crucial raw material for nuclear fusion, the efficient separation of deuterium from H₂/D₂ mixture gas is of paramount importance. However, the similar physical and chemical properties of hydrogen isotope gases make this work a significant challenge. In this study, Ag (I) ions were coordinated into the metal–organic framework MOF-303 to synthesize Ag-MOF-303 with 5.8 Å pore size for H₂/D₂ separation. The adsorption capacity per unit BET surface area was approximately 50 % higher than that of MOF-303 at 87 K. Combining the experimental results and GCMC calculations, although there was no CAQS between Ag-MOF-303 and H₂/D₂, the affinity between Ag-MOF-303 and H₂/D₂ was enhanced by Ag (I), resulting in an increase in IAST selectivity from 1.62 to 1.93 (77 K). Furthermore, dynamic breakthrough experiments also demonstrated effective separation performance (the penetration selectivity was increased from 1.26 to 1.33), and the H₂/D₂ separation factor was measured to be 6.12 using TDS at 30 K and 1 kPa.

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Ag- mof -303的Ag(I)配位增强了对H2/D2的吸附和分离能力

氘作为核聚变的关键原料，从H2/D2混合气体中高效分离氘具有至关重要的意义。然而，氢同位素气体相似的物理和化学性质使这项工作成为一个重大挑战。本研究将Ag（Ⅰ）离子配位到金属有机骨架MOF-303中，合成孔径为5.8 Å的Ag-MOF-303，用于H2/D2分离。在87 K时，单位BET表面积的吸附量比MOF-303高约50 %。结合实验结果和GCMC计算，虽然Ag- mof -303与H2/D2之间没有CAQS，但Ag (I)增强了Ag- mof -303与H2/D2之间的亲和力，使IAST选择性从1.62提高到1.93（77 K）。在30 K和1 kPa条件下，TDS的H2/D2分离系数为6.12，动态突破实验也显示了有效的分离效果（穿透选择性从1.26提高到1.33）。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.