Highly Selective Oxidative Dehydrogenation of Ethane to Ethylene via Chemical Looping with Oxygen Uncoupling through Structural Engineering of the Oxygen Carrier
نویسندگان
چکیده
The oxidative dehydrogenation of ethane (ODH) to produce ethylene offers advantages compared the industry standard steam cracking, but its industrial application is hindered by costly air separation units needed supply oxygen. A chemical-looping-based (CL-ODH) scheme presented, in which oxygen carriers gaseous situ, then reacts with presence a catalyst at comparatively low temperature (500 °C). common challenge chemical looping processes beyond combustion suppress overoxidation hydrocarbons COx enable high product yields. It demonstrated that can be eliminated completely through structural engineering perovskite carrier involving alkali-metal-based carbonate coatings, while maintaining materials’ ability generate Through CL-ODH, higher selectivity (≈91%) and yields (≈39%) are achieved conventional ODH without cofeeding air/ethane. 18O-labeling experiments demonstrate layer functions like diffusion barrier for being permeable Both CL-ODH material design strategy extended other catalytic oxidation or reactions requiring different temperatures, offering enormous potential intensify such processes.
منابع مشابه
System Level and Reactor Level Simulations of Chemical Looping Combustion and Chemical Looping with Oxygen Uncoupling
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ژورنال
عنوان ژورنال: Advanced Energy Materials
سال: 2022
ISSN: ['1614-6832', '1614-6840']
DOI: https://doi.org/10.1002/aenm.202200405