Numerical Analysis of Hydrogen Sulphide Conversion to Hydrogen during Its Pyrolysis and Partial Oxidation
| Autor: | O. N. Favorskii, V.A. Savelieva, Nataliya S. Titova, Alexander M. Starik |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Hydrogen General Chemical Engineering 05 social sciences General Physics and Astronomy Energy Engineering and Power Technology Thermodynamics chemistry.chemical_element Non-equilibrium thermodynamics 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Residence time (fluid dynamics) Mole fraction Fuel Technology chemistry Yield (chemistry) 0502 economics and business Partial oxidation 050207 economics 0210 nano-technology Adiabatic process Pyrolysis |
| Zdroj: | Combustion, Explosion, and Shock Waves. 54:136-146 |
| ISSN: | 1573-8345 0010-5082 |
| Popis: | Production of hydrogen during pyrolysis and partial oxidation of hydrogen sulphide is analyzed on the basis of a detailed kinetic model of H2S oxidation. It is shown that the H2 yield in the case of H2S pyrolysis in an adiabatic flow reactor with a residence time of ≈1 s is rather small. Even for the initial temperature of the mixture T0 = 1400 K, the molar fraction of H2 is only 12%, though the equilibrium value is reached within the reactor in this case. At T0 φb and low values of T0 is essentially nonequilibrium; as a result, the H2 concentration at the exit from a finite-length reactor can be higher than its equilibrium value, e.g., the relative yield of H2 can exceed the equilibrium value by 30–40% at T0 = 800 K and φ = 6–10. The reasons responsible for reaching a “superequilibrium” concentration of H2 at the flow reactor exit are determined. |
| Databáze: | OpenAIRE |
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