Thermodynamic Evaluation of Syngas Production by High-Temperature Conversion of Waste Oil

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Abstract

Thermodynamic evaluation of syngas production by high-temperature conversion of waste oil was performed using the Gibbs free energy minimization method. Optimum conditions for maximum hydrogen production while minimizing coke formation were determined. Equilibrium calculations were performed at atmospheric pressure with varying fuel excess ratio and water vapor amount. The results show that the optimal conditions for air-steam conversion of waste oil are: fuel excess ratio equal to 3.5 and molar ratio of water vapor to oxygen equal to 0.2. Under these conditions, coke formation does not occur, and hydrogen and carbon monoxide concentrations equal 27.5% and 28.4%, respectively.

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About the authors

M. V. Tsvetkov

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences

Author for correspondence.
Email: tsvetkovmv@gmail.com
Russian Federation, Chernogolovka

D. N. Podlesny

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences

Email: tsvetkovmv@gmail.com
Russian Federation, Chernogolovka

Yu. Yu. Tsvetkova

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences

Email: tsvetkovmv@gmail.com
Russian Federation, Chernogolovka

M. V. Salganskaya

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences

Email: tsvetkovmv@gmail.com
Russian Federation, Chernogolovka

A. Yu. Zaychenko

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences

Email: tsvetkovmv@gmail.com
Russian Federation, Chernogolovka

V. M. Kislov

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences

Email: tsvetkovmv@gmail.com
Russian Federation, Chernogolovka

E. A. Salgansky

Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences

Email: tsvetkovmv@gmail.com
Russian Federation, Chernogolovka

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2. Fig. 1. Dependences of volume fraction of obtained compounds (V) and adiabatic combustion temperature (T) on stoichiometric fuel excess ratio (φ) for air conversion of waste oil. Curves: 1 - H2, 2 - CO, 3 - H2O, 4 - CO2, 5 - temperature.

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3. Fig. 2. Dependences of mole fraction of obtained compounds (V) on temperature (T) at φ = 3.5 for air conversion of waste oil. Curves: 1 - H2, 2 - CO, 3 - H2O, 4 - CO2, 5 - C (vol.).

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4. Fig. 3. Dependences of mole fraction of products (V) and adiabatic combustion temperature (T) on [H2O]/[O2] ratio at φ = 3.5 for vapour-air conversion of waste oil. Curves: 1 - H2, 2 - CO, 3 - H2O, 4 - CO2, 5 - temperature, 6 - C (vol.).

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