| Autor: |
REINIK, JANEK, HEINMAA, IVO, RITAMÄKI, JOHANNES, BOSTRÖM, DAN, PONGRÁCZ, EVA, HUUHTANEN, MIKA, LARSSON, WILLIAM, KEISKI, RIITTA, KORDÁS, KRISZTIÁN, MIKKOLA, JYRI-PEKKA |
| Předmět: |
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| Zdroj: |
Oil Shale; 2014, Vol. 31 Issue 1, p79-90, 12p |
| Abstrakt: |
The present study focuses on the direct chemical adsorption of CO2 onto alkaline hydrothermally activated oil shale fly ash (OSFA). The CO2 chemisorption experiments were conducted in a high-pressure reactor at a temperature of 150 °C and CO2 partial pressure of 100 bar during a 24-hour period. Original, activated and chemisorbed OSFA samples were characterized by means of X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM) coupled with energy-dispersive X-ray spectroscopy (EDS), specific surface area (BETN2) and high-resolution 29Si magic angle spinning nuclear magnetic resonance (MAS-NMR). The results indicated moderate weight increase (max 5 wt%) and according to XRD and MAS-NMR analysis tobermorites had reacted with CO2, leading to calcite formation. The results also show that the alkaline hydrothermally activated OSFA has a potential to be used in industrial processes for direct chemical adsorption of CO2 from flue gases. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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