| Autor: |
Yergaziyeva, G. Y., Kutelia, E., Dossumov, K., Gventsadze, D., Jalabadze, N., Dzigrashvili, T., Nadaraia, L., Tsurtsumia, O., Anissova, M. M., Mambetova, M. M., Eristavi, B., Khudaibergenov, N. |
| Předmět: |
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| Zdroj: |
Eurasian Chemico-Technological Journal; 2023, Vol. 25 Issue 1, p21-32, 12p |
| Abstrakt: |
The effect of modifying additive (La2-3) on the activity of Ni-Co oxides was studied for the dry reforming of methane (DRM). The catalysts were prepared by impregnation of the granulated diatomite (D) and characterized by SEM, EDX, H2-TPR, XRD, and AES. It is shown that the addition of 1.5 wt.% La2O3 into the Ni-Co/D composition leads to an increase in the activity of the catalyst, providing a methane conversion that is close under thermodynamic equilibrium conditions in the temperature range of 700-850 °C. The highest activity is achieved at T = 850 °C, the conversion of methane is 96%, and carbon dioxide is 92%. The addition of lanthanum oxide to the Ni-Co/D composition led to an increase in catalyst stability; after testing in the DRM reaction for 360 min, the deactivation coefficient for methane was 3.4%, and for carbon dioxide 2.5%. While significant deactivation is observed for Ni-Co/D, the deactivation coefficient for methane is 19%, and for carbon dioxide 36%. Many characterization results (SEM, H2-TPR, and XRD) confirm that Ni-Co-La/D has abundant surface oxygen and the presence of spinel structures that contribute to the reactivity of CH4 and CO2, which positively affect its activity. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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