| Autor: |
Matus, Е. V., Kerzhentsev, M. A., Nikitin, A. P., Sozinov, S. A., Ismagilov, Z. R. |
| Předmět: |
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| Zdroj: |
Eurasian Chemico-Technological Journal; 2024, Vol. 26 Issue 1, p3-14, 12p |
| Abstrakt: |
For the processing of coal mine methane into hydrogen-containing gas, a catalytic process of methane tri-reforming (OH4 + O2 + CO2 + H2O) was proposed and its component reactions were studied -- partial oxidation (OH4 + O2, POM), dry reforming (OH4 + CO2, DRM) and steam reforming (OH4 + H 2O, SRM) of methane. Promoted nickel supported on aluminum oxide was used as a catalyst. Experiments were carried out by varying temperature (600--850 ºC), contact time (0.04--0.15 s), linear feed rate (40--240 cm/min) and composition of the reaction mixture (POM -- OH4 : O2 : He = 1 : (0.5--0.7) : (3.3--3.4); DRM -- OH4 : CO2 : He = 1 : (0.8--1.4) : (2.6--3.2); SRM -- CH4 : H2O : He = 1 : (0.8--2.0) : (2.0--3.2)). Optimal reaction conditions were determined to ensure maximum efficiency of hydrogen production by reforming methane-containing mixtures of various compositions (temperature in the range of 800--850 ºC, contact time 0.15 s, linear feed rate 160 cm/min, molar ratio of CH4 : O2 = 1 : 0.5 for POM, CH4 : CO2 = 1 : 1 for DRM and CH4 : H2O = 1 : 1.1 for SRM). The degree of catalyst carbonization during the reactions was reduced (from 3 to 1.5% for POM, from 20.7 to 2.2% for DRM, and from 15.2 to 0.4% for SRM) due to an increase in the O/C molar ratio in the initial reaction mixture. Regulation of H2/CO molar ratio was achieved over a wide range (0.9--6.5). It has been shown that the hydrogen concentration in the resulting hydrogen-containing mixture is determined by the type of process and is equal to 30±5 vol.%. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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