脱氢
选择性
催化作用
丙烷
X射线光电子能谱
氧气
化学
氧化还原
无机化学
部分氧化
环氧丙烷
丙烯
材料科学
化学工程
有机化学
聚合物
工程类
环氧乙烷
共聚物
作者
Majid L. Balogun,Wasim Ullah Khan,M. Nasiruzzaman Shaikh,Sagir Adamu,Abeer S. Arjah,Saad A. Al-Bogami,Sameer Al-Ghamdi,Mohammad M. Hossain
标识
DOI:10.1016/j.apcata.2023.119087
摘要
A redox catalyst with MoO3 loaded on CaMnO3 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 CO2 emission, which is highly desirable from an environmental perspective. H2-TPR indicates that the incorporation of MoO3 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 MoO3 on CaMnO3. XPS analysis demonstrates that MoO3 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% MoO3/CaMnO3. The catalysts also show stable activity in successive redox cycles. The addition of MoO3 enhances propylene yield and selectivity, due to free lattice oxygen, as revealed by XPS and H2-TPR.
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