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Potassium-modified calcium-ferrate-catalyzed hydrogenation of carbon dioxide to produce light olefins.
- Source :
- New Journal of Chemistry; 7/28/2024, Vol. 48 Issue 28, p12616-12625, 10p
- Publication Year :
- 2024
-
Abstract
- Hydrogenating CO<subscript>2</subscript> to produce light olefins is a highly promising route for olefin synthesis. However, the premise of achieving a high yield is to develop a catalyst with a high conversion rate, selectivity, and stability. This paper reports a Ca<subscript>2−x</subscript>K<subscript>x</subscript>Fe<subscript>2</subscript>O<subscript>5</subscript> catalyst with an CO<subscript>2</subscript> conversion of up to 46%, a light olefin selectivity of 34.59%, and an olefin-alkane molar ratio of 8.31. Ca addition increased the oxygen vacancy concentration and strong basic sites of the catalyst, resulting in improved HCOO* intermediate formation, better CO selectivity, and higher CO<subscript>2</subscript> conversion rates. Meanwhile, the addition of K further enhanced the rate of CO<subscript>2</subscript> conversion while also improving the selectivity of light olefins by promoting C–C coupling. Furthermore, the Ca<subscript>1.0</subscript>K<subscript>1.0</subscript>Fe<subscript>2</subscript>O<subscript>5</subscript> catalyst demonstrated no notable deactivation over a period of 72 h, indicating the strong industrial potential of this catalyst. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 48
- Issue :
- 28
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 178418623
- Full Text :
- https://doi.org/10.1039/d4nj01579g