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Introduction. The use of capillary-porous elements for absorption of carbon dioxide fluid can intensify the process and ensure the stability of the finished product. Materials and methods. Investigated the process of saturation of water carbon dioxide. Mass concentration of carbon dioxide in water was determined by the pressure and temperature of the mixture and comparison of tabular data. Pressure water supply to the input capillary-porous device 0.4 - 0.6 MPa; supply pressure of carbon dioxide in the space between the shell capillaryporous element and membrane 0,45-0,65 MPa; water temperature at the site saturation t = 4 ÷ 12°C. Results and discussion. Mass concentration of carbon dioxide has a linear dependence on the pressure and nonlinear from temperature changes and diameter of capillary. With increasing pressure from 0.4 MPa to 0.6 mass concentration of carbon dioxide in the liquid increases: at the temperature 4°C - from 0.59 to 0.73 % mass, at 8°C - from 0.56 to 0.63 % mass, and at 12°C - from 0.39 to 49 % mass. Mass concentration of the mixture decreases with increasing temperature: at a pressure of 0.6 MPa - from 0.73 to 0.49 % mass, at 0.5 MPa - from 0.64 to 0.46 % mass, at 0.4 MPa - from 0.59 to 0.41 % mass. With the growth of capillary diameter 10 to 20 mm mass concentration of carbon dioxide in the liquid is reduced: at the temperature 4°C - from 0.73 to 0.67 % mass, at 8°C from 0.62 to 0.57 % mass, and at 12°C - from 0.49 to 40 % mass. It is connected with the structural formations of water molecules and their oscillating motion. At low temperatures the oscillating motion of the molecular structures of water are not significant and carbon dioxide molecules easily penetrate into these structures without destroying them. And at high temperatures (8 ÷ 12°C) oscillatory motion of molecular structures of water becomes higher and not all CO² molecules have the ability to penetrate into the data structure. The mathematical dependence of the concentration of carbon dioxide in water from pressure, temperature and capillary diameter allows you to adjust the process and determine its rational parameters. Rational parameters of saturation: pressure supply water to the absorption P = 0,5 MPa, water temperature 8°C and diameter capillary-porous channel dk = 10 mm. Conclusions. Application results in the production of carbonated beverages to increase productivity, reduce the loss of carbon dioxide and increase for foam stability. [ABSTRACT FROM AUTHOR]