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Redox MoO3/CaMnO3 catalysts for chemical-looping oxidative dehydrogenation of propane: A greener approach of propylene production.
- Source :
-
Applied Catalysis A: General . Apr2023, Vol. 655, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- A redox catalyst with MoO 3 loaded on CaMnO 3 perovskite was evaluated for chemical-looping oxidative dehydrogenation (ODH) of propane to produce propylene. This approach requires less energy for the production per unit of propylene with minimum CO 2 emission, which is highly desirable from an environmental perspective. H 2 -TPR indicates that the incorporation of MoO 3 minimizes the release of surface oxygen, which is favorable for high propylene selectivity. XRD reveals the presence of active sites, while scanning SEM-EDX show uniform dispersion of deposited MoO 3 on CaMnO 3. XPS analysis demonstrates that MoO 3 addition promotes the formation of lattice oxygen which improves the propylene selectivity. The highest propylene yield of 30.6% with a propylene selectivity of 59% was achieved at 550 ℃ with 10% MoO 3 /CaMnO 3. The catalysts also show stable activity in successive redox cycles. The addition of MoO 3 enhances propylene yield and selectivity, due to free lattice oxygen, as revealed by XPS and H 2 -TPR. [Display omitted] [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0926860X
- Volume :
- 655
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis A: General
- Publication Type :
- Academic Journal
- Accession number :
- 162286767
- Full Text :
- https://doi.org/10.1016/j.apcata.2023.119087