Numpilai, Thanapha and Chanlek, Narong and Poo‐Arporn, Yingyot and Cheng, C. K. and Siri‐Nguan, Nuchanart and Sornchamni, Thana and Chareonpanich, Metta and Kongkachuichay, Paisan and Yigit, Nevzat and Rupprechter, Günther and Limtrakul, Jumras and Witoon, Thongthai (2020) Tuning interactions of surface‐adsorbed species over Fe−Co/K−Al2O3 catalyst by different K contents: selective CO2 hydrogenation to light olefins. ChemCatChem, 12 (12). 3306 -3320. ISSN 1867-3899. (Published)
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Abstract
Selective CO2 hydrogenation to light olefins over Fe−Co/K−Al2O3 catalysts was enhanced by tuning bonding strengths of adsorbed species by varying the content of the K promotor. Increasing the K/Fe atomic ratio from 0 to 0.5 increased the olefins/paraffins (O/P) ratio by 25.4 times, but then slightly raised upon ascending K/Fe to 2.5. The positive effect of K addition is attributed to the strong interaction of H adsorbed with the catalyst surface caused by the electron donor from K to Fe species. Although the Fe−Co/K−Al2O3 catalyst with K/Fe=2.5 reached the highest O/P ratio of 7.6, the maximum yield of light olefins of 16.4 % was achieved by the catalyst promoted with K/Fe of 0.5. This is explained by the considerable reduction of amount of H2 adsorbed on the catalyst surface with K/Fe=2.5.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Carbon dioxide; Heterogeneous catalysis; Hydrogenation; K/Fe atomic ratio; Light olefins |
| Subjects: | T Technology > TP Chemical technology |
| Faculty/Division: | Faculty of Chemical & Natural Resources Engineering |
| Depositing User: | Mrs Norsaini Abdul Samat |
| Date Deposited: | 08 Nov 2021 03:37 |
| Last Modified: | 08 Nov 2021 03:37 |
| URI: | http://umpir.ump.edu.my/id/eprint/32299 |
| Download Statistic: | View Download Statistics |
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