Regularities of non-catalytic partial oxidation of hydrocarbons C1–C4 at temperatures of 1400-1800 K
DOI:
https://doi.org/10.18321/cpc24(2)161-196Keywords:
non-catalytic conversion, pyrolysis, partial oxidation, thermodynamic analysis, kinetic modeling, methane, C2+ hydrocarbons, synthesis gasAbstract
The article presents the results of thermodynamic analysis and kinetic modeling of non-catalytic partial oxidation of C1–C4 hydrocarbons at temperatures of 1400-1800 K and pressures up to 50 atm. It has been established that at the first stage of partial oxidation of C2+ hydrocarbons in the studied temperature and pressure range, their transformation begins not with interaction with oxygen, but with their thermal pyrolysis without the participation of oxygen-containing radicals. Oxygen conversion occurs as a result of its interaction with the pyrolysis products of C2+ hydrocarbons, mainly ethylene, which is a more stable hydrocarbon in this temperature range, along with acetylene. The oxidative conversion of methane occurs as a result of its interaction with oxygen, and the consumption of both reagents proceeds symbatically at a significantly lower rate than the oxidation of C2+ hydrocarbons. After the O2 is completely consumed in the second stage, the subsequent conversion of hydrocarbons proceeds through the conversion processes of CO, C2H2 and CH4, which are slower than oxidation. The main converting agent in this case is H2O. As a result of these reactions, the content of H2 and CO in the synthesis gas increases significantly, and with sufficient reaction time, a distribution of products close to equilibrium is achieved.
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Copyright (c) 2026 В.И. Савченко, А.В. Озерский, А.В. Никитин, И.В. Седов, В.С. Арутюнов
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