Development of Metal–Organic Molecular Sieves for the Separation and Sorption of СО 2 and СН 4

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.