Phuong, Duy Ha Le and Alsaiari, Mabkhoot A. and Pham, Cham Q. and Hieu, Nguyen Huu and T․ Pham, Thuy Phuong and Natarajan, Rajamohan and Pham, Duong Dinh and Vo, Dai Viet N. and Trinh, Thanh H. and Herma Dina, Setiabudi and Nguyen, Dang Le Tri and Nguyen, Tung Manh (2024) Carbon dioxide reforming of methane over modified iron-cobalt alumina catalyst : Role of promoter. Journal of the Taiwan Institute of Chemical Engineers, 155 (105253). pp. 1-11. ISSN 1876-1070. (Published)
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Abstract
Cobalt-based catalysts are widely employed in methane dry reforming but tend to deactivate quickly due to coke deposits and metal sintering. To enhance the performance, iron, a cost-effective promoter, is added, improving cobalt's metal dispersibility, reducibility, and basicity on the support. This addition accelerates carbon gasification, effectively inhibiting coke deposition. Methods: A series of iron-doped cobalt alumina MFe-5Co/Al2O3 (M= 0, 0.4, 0.8, 1, 2 wt.%) were prepared via simple incipient-wetness impregnation. The catalysts were thoroughly characterized via modern techniques including BET, XRD, H2-TPR, CO2-TPD. Significant findings: The addition of iron had a minimal impact on the properties of γ-Al2O3, but it significantly affected the dispersibility of cobalt. At an optimal dosage of 0.8 wt.%, there was a notable decrease of 29.44% in Co3O4 particle size. However, excessive iron loading induced agglomeration of Co3O4, which was reversible. The presence of iron also resulted in a decrease in the reduction temperature of Co3O4. The material's basicity was primarily influenced by the loading of iron, reaching its highest value of 705.7 μmol CO2 g−1 in the 2Fe-5Co/Al2O3. The correlation between catalytic activity and the physicochemical properties of the material was established. The 0.8Fe-5Co/Al2O3 sample exhibited excellent performance due to the favorable dispersibility of cobalt, its reducibility, and its affordable basicity.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Cobalt alumina catalyst; Dosage of promoter; Iron promoter; Material basicity; Methane dry reforming |
| Subjects: | Q Science > QD Chemistry T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
| Faculty/Division: | Institute of Postgraduate Studies Faculty of Chemical and Process Engineering Technology |
| Depositing User: | Mr Muhamad Firdaus Janih@Jaini |
| Date Deposited: | 01 Jul 2024 01:05 |
| Last Modified: | 01 Jul 2024 01:05 |
| URI: | http://umpir.ump.edu.my/id/eprint/41285 |
| Download Statistic: | View Download Statistics |
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