This work considers new possibilities for the use of membrane gas separation technology for target control of the composition of synthesis gas. For this purpose, we propose using highly permeable modified disubstituted polyacetylenes with an improved combination of selectivity of separation of hydrogen, carbon monoxide, and carbon dioxide and a high level of transfer of hydrogen as the main component of synthesis gas. This work presents the description of the modification of polymers and key

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... perties of membrane materials. The process of membrane separation of synthesis gas is modeled using both commercially available membranes and new laboratory membranes. The possibility of creating a combined membrane system providing the preparation of synthesis gas with a wide range of H 2 : CO ratios (from 0.5 to 4) and a low residual concentration of CO 2 (5 vol %) from biosyngas with the composition H 2 (40 vol %)/CO (25 vol %)/CO 2 (35 vol %) is also shown.