Development of Metal–Organic Molecular Sieves for the Separation and Sorption of СО2 and СН4

• Published in: Petroleum chemistry 2023-02, Vol.63 (2), p.233-240
• Main Authors: Seromlyanova, K. A., Mushtakov, A. G., Murtazin, D. V., Bondarenko, S. P., Markova, E. B.
• Format: Article
• Language: English
• Subjects: Adsorption; Chemical composition; Chemical synthesis; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Infrared spectroscopy; Metal-organic frameworks; Molecular sieves; Organic chemistry; Separation; Sorption; Water vapor; X ray fluorescence analysis
• ISSN: 0965-5441; 1555-6239
• DOI: 10.1134/S0965544123020263

The paper deals with the synthesis and modification of metal–organic molecular sieves for the separation and sorption of СО 2 and СН 4 . The metal–organic framework compound Сu 3 (BTС) 2 was incorporated for the first time into the MeKS carbon matrix, which allowed stabilization of Сu 3 (BTС) 2 and expansion of the stability range of the framework compound from pH 3.1–7.8 for Сu 3 (BTС) 2 to pH 2.85–9.90 for Сu 3 (BTС) 2 /С. The structure and chemical composition of the products were proved by X-ray diffraction, X-ray fluorescence analysis, IR spectroscopy, and scanning electron microscopy. The textural characteristics of the material were determined from the results of adsorption tests with nitrogen, water vapor, and pyridine. The ability of both Сu 3 (BTС) 2 and Сu 3 (BTС) 2 /С to accumulate СО 2 and СН 4 was examined. The modification increased the adsorption capacity for СО 2 and СН 4 . The Сu 3 (BTС) 2 modification improves the efficiency of the separation of СО 2 and СН 4 from H 2 , О 2 , N 2 : The separation factors of CO 2 and CH 4 from inseparable H 2 , O 2 , and N 2 were 3 and 3.8, respectively.