Key words: transformation of pyrrole in supercritical water and hydrogen-oxygen fluid
The transformation of pyrrole in supercritical water and hydrogen-oxygen fluid in the flow mode (673-823 K, 25 MPa, acid excess coefficient ≤ 2.46, residence time 18-148 s) was investigated. It was found that in the absence of O2, an increase in temperature leads to an increase in the degree of transformation of pyrrole and the release of gaseous products (H2, CH4, CO and CO2). When pyrrole is oxidized in an oxygenated fluid, the oxygen excess coefficient has a greater effect on the degree of removal of organic carbon than the temperature. The products obtained at 723 and 773 K contain a solid whose IR spectrum corresponds to polypyrrole. In general, the oxidation of pyrrole in the hydrogen-oxygen fluid proceeds by the mechanism of parallel and sequential reactions, including the formation and oxidation of the products of the opening cycle, as well as the formation and oxidation of the polymerization products of pyrrole.
doi:10.34984/SCFTP.2022.17.3.002