The structure-performance evolution of Co/N-AC catalyst during ethylene oligomerization was investigated in detail. It was found that the catalytic activity sharply decreased in the first 30 h with the ethylene conversion decreasing from 64 to 4%. Butene selectivity increased gradually in the first 10 h then remained about 74%, while the selectivity for hexene and octene exhibited an opposite trend. The ratio of α-olefin to isomers for butene increased greatly with time on stream and most of the generated butene was 1-butene. Based on the structure characterization at different reaction stages, CoOx was suggested to be major active phase and the coverage of long-chain hydrocarbons as well as the loss of surface CoOx active sites due to size growth of Co3O4 nanoparticles were the main reasons for catalytic deactivation.
The structure-performance evolution of Co/N-AC catalyst during ethylene oligomerization was investigated and the coverage of long-chain hydrocarbons as well as the loss of surface CoOx active sites due to size growth of Co3O4 nanoparticles were the main reasons for catalytic deactivation
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This work was financially supported by Natural Science Foundation of China (91945301), the National Key R&D Program of China (2017YFB0602202), Program of Shanghai Academic/Technology Research Leader (20XD1404000), Key Research Program of Frontier Sciences, CAS (Grant No. QYZDB-SSW-SLH035), the “Transformational Technologies for Clean Energy and Demonstration”, Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA21020600), Natural Science Foundation of Shanghai (18ZR1444100), Youth Innovation Promotion Association of CAS.
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Zhu, K., An, Y., Yu, F. et al. Structure-Performance Evolution of Cobalt-Ammonia Activated Carbon Catalyst for Ethylene Oligomerization. Catal Lett (2021). https://doi.org/10.1007/s10562-021-03790-7
- Ethylene oligomerization
- Catalysts regeneration