Gas-Hydrate Formation and Phase Transformations of Adsorbed Water in Kuznetsk Basin Coal
| Autor: | Z. R. Ismagilov, T. L. Kim, V. G. Smirnov, A. Yu. Manakov, V. V. Dyrdin |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry 020209 energy Process Chemistry and Technology Clathrate hydrate chemistry.chemical_element 02 engineering and technology Coke Methane chemistry.chemical_compound Fuel Technology 020401 chemical engineering chemistry Chemical engineering Phase (matter) Carbon dioxide 0202 electrical engineering electronic engineering information engineering Environmental Chemistry Coal 0204 chemical engineering business Hydrate Carbon |
| Zdroj: | Coke and Chemistry. 61:193-201 |
| ISSN: | 1934-8398 1068-364X |
| Popis: | Among the properties of coal that must be studied in order to optimize its preparation for coke production and deep processing are the interactions of adsorbed materials—in particular, water, methane, and carbon dioxide—with its surface. An important aspect of these interactions is phase transformation of the adsorbed materials in the internal porous structure to form hydrate or ordinary ice. In regular coal, a hydrate of carbon dioxide is formed at a CO2 pressure of 2–4 MPa and temperatures below 10°C, when the moisture content of the coal exceeds the threshold value. However, at the same moisture content, no ice is formed at temperatures between +13°C and –13°C, while decomposition of the hydrate is observed close to the equilibrium curve. For gases that do not form hydrates (helium, nitrogen, argon) in the given temperature and pressure ranges, increasing the pressure to 12 MPa has no influence on the solidification of sorbed water and ice formation. |
| Databáze: | OpenAIRE |
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