High-permeability selective polymer membranes for pyrocondensate separation

The aim of the work was to determine the optimal technological parameters for obtaining pure hydrocarbon fractions and extracting pyrocarbon and heavy pyrolysis resin. The work used a method of membrane separation of pyrocondensate using highly permeable selective polymer membranes. It was established that the average composition of pyrocondensate contains up to 58.4% of hydrocarbons suitable for obtaining gasoline, kerosene and diesel fractions, as well as 20% of unsaturated hydrocarbons and 20% of pyrocarbon with heavy pyrolysis resin. The effectiveness of membrane technology for separating pyrocondensate with the production of gasoline (8.2%), kerosene and diesel (23.9%) fractions with low sulphur and unsaturated hydrocarbon content has been proven. The characteristics of the fractions obtained met the requirements of standards for their use as finished commercial products. The optimal separation temperatures for each fraction were determined: gasoline – 50°C, kerosene – 70°C, diesel – 85°C. The dependence of membrane permeability on temperature and selectivity for unsaturated hydrocarbons and sulphur was established. The separation process ensured the simultaneous removal of pyrocarbon and heavy pyrolysis resin, which simplifies the technology and increases its efficiency. The proposed catalytic methods for processing pyrocarbon sediment and unsaturated hydrocarbon residues allow for the complete processing of pyrocondensate from 96% to 98%. The possibility of using membrane technology for the efficient processing of pyrocondensate with minimal impact on the environment has been confirmed. Analytical and experimental principles for calculating membrane separation devices and their productivity have been developed. The proposed solutions can be applied to the production of high-quality fuel fractions from waste materials