Study of the kinetic laws of the conversion reaction of a mixture of water vapor, carbonate anhydrium and methane into synthesis gas

The work presents the results of thermodynamic calculation of the composition of the mixture obtained during the conversion of methane steam carbon dioxide water vapor, carbon dioxide and methane mixture into synthesis gas. As a result of research, it was determined that the minimum value of the conversion temperature of the mixture of water vapor, carbon dioxide and methane to synthesis gas to obtain synthesis gas acceptable for the synthesis of liquid hydrocarbons by the Fischer-Tropsch method is 800°C. The experiments were carried out at a temperature of 450°C in the mixing chamber and 900°C in the reaction zone of the components of the initial gas mixture of different contents of the gas mixture. The temperature in the reaction zone was determined by the strength characteristics of the heat-resistant alloy of the reactor vessel designed to obtain synthesis gas consisting of a mixture of water vapors of methane and carbon dioxide. Data obtained as a result of the experiment show that the proposed technology of conversion of a mixture of methane water vapor, carbon dioxide and methane into synthesis gas allows obtaining synthesis gas with a ratio of hydrogen to carbon dioxide from 1.5 to 4.5. The selectivity of H2 and CO increases by more than 10% with the increase of the conversion temperature of the mixture of water vapor, carbon dioxide and methane to synthesis gas from 800 to 850°C, and it does not change much when the temperature increases from 850 to 900°C. The yield of H2 and CO increases with increasing temperature from 800 to 850°C and remains practically constant with increasing temperature from 850 to 900°C. In the temperature range from 800 to 900°C, the conversion rates of the mixture of CH4 water vapor, carbon dioxide and methane to synthesis gas remain practically unchanged.

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