Mn decorated Na/Fe catalysts for CO 2 hydrogenation to light olefins
A series of Mn decorated Na/Fe catalysts is synthesized and investigated to understand their promotional effect on CO 2 hydrogenation to light olefins. The addition of Mn to the Na/Fe catalysts significantly improves the selectivity of light olefins and reduces the C 5+ selectivity. The catalyst exh...
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| Veröffentlicht in: | Catalysis science & technology 2019-01, Vol.9 (2), p.456-464 |
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| creator | Liang, Binglian Sun, Ting Ma, Junguo Duan, Hongmin Li, Lin Yang, Xiaoli Zhang, Yaru Su, Xiong Huang, Yanqiang Zhang, Tao |
| description | A series of Mn decorated Na/Fe catalysts is synthesized and investigated to understand their promotional effect on CO
2
hydrogenation to light olefins. The addition of Mn to the Na/Fe catalysts significantly improves the selectivity of light olefins and reduces the C
5+
selectivity. The catalyst exhibiting optimal catalytic performance, 5Mn–Na/Fe, shows a CO
2
conversion of 38.6% with high selectivity of light olefins (30.2%), high O/P ratio (7.5), and low selectivity of methane (11.8%) and CO (11.7%). XRD and Mössbauer spectra indicate that the addition of Mn to Na/Fe catalysts facilitates the formation of active Fe
5
C
2
species. Besides, the strong interaction between the Mn promoter and Fe species is revealed by the Mössbauer spectra, XRD and XPS, which lowers the amount and strength of CO adsorption, and consequently contributes to the weakening of the chain-growth reaction leading to the high selectivity of light olefins. This work can provide guidance for catalyst design through the modulation of the ability of the chain-growth reaction to improve the catalytic performance in CO
2
hydrogenation. |
| doi_str_mv | 10.1039/C8CY02275E |
| format | Article |
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2
hydrogenation to light olefins. The addition of Mn to the Na/Fe catalysts significantly improves the selectivity of light olefins and reduces the C
5+
selectivity. The catalyst exhibiting optimal catalytic performance, 5Mn–Na/Fe, shows a CO
2
conversion of 38.6% with high selectivity of light olefins (30.2%), high O/P ratio (7.5), and low selectivity of methane (11.8%) and CO (11.7%). XRD and Mössbauer spectra indicate that the addition of Mn to Na/Fe catalysts facilitates the formation of active Fe
5
C
2
species. Besides, the strong interaction between the Mn promoter and Fe species is revealed by the Mössbauer spectra, XRD and XPS, which lowers the amount and strength of CO adsorption, and consequently contributes to the weakening of the chain-growth reaction leading to the high selectivity of light olefins. This work can provide guidance for catalyst design through the modulation of the ability of the chain-growth reaction to improve the catalytic performance in CO
2
hydrogenation.</description><identifier>ISSN: 2044-4753</identifier><identifier>EISSN: 2044-4761</identifier><identifier>DOI: 10.1039/C8CY02275E</identifier><language>eng</language><ispartof>Catalysis science & technology, 2019-01, Vol.9 (2), p.456-464</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c146t-4099e87d0b44272a5717f730f664a0f51e5b01fd9fffc551806d5ddef5c861673</citedby><cites>FETCH-LOGICAL-c146t-4099e87d0b44272a5717f730f664a0f51e5b01fd9fffc551806d5ddef5c861673</cites><orcidid>0000-0001-9470-7215 ; 0000-0002-3647-7703 ; 0000-0002-7556-317X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Liang, Binglian</creatorcontrib><creatorcontrib>Sun, Ting</creatorcontrib><creatorcontrib>Ma, Junguo</creatorcontrib><creatorcontrib>Duan, Hongmin</creatorcontrib><creatorcontrib>Li, Lin</creatorcontrib><creatorcontrib>Yang, Xiaoli</creatorcontrib><creatorcontrib>Zhang, Yaru</creatorcontrib><creatorcontrib>Su, Xiong</creatorcontrib><creatorcontrib>Huang, Yanqiang</creatorcontrib><creatorcontrib>Zhang, Tao</creatorcontrib><title>Mn decorated Na/Fe catalysts for CO 2 hydrogenation to light olefins</title><title>Catalysis science & technology</title><description>A series of Mn decorated Na/Fe catalysts is synthesized and investigated to understand their promotional effect on CO
2
hydrogenation to light olefins. The addition of Mn to the Na/Fe catalysts significantly improves the selectivity of light olefins and reduces the C
5+
selectivity. The catalyst exhibiting optimal catalytic performance, 5Mn–Na/Fe, shows a CO
2
conversion of 38.6% with high selectivity of light olefins (30.2%), high O/P ratio (7.5), and low selectivity of methane (11.8%) and CO (11.7%). XRD and Mössbauer spectra indicate that the addition of Mn to Na/Fe catalysts facilitates the formation of active Fe
5
C
2
species. Besides, the strong interaction between the Mn promoter and Fe species is revealed by the Mössbauer spectra, XRD and XPS, which lowers the amount and strength of CO adsorption, and consequently contributes to the weakening of the chain-growth reaction leading to the high selectivity of light olefins. This work can provide guidance for catalyst design through the modulation of the ability of the chain-growth reaction to improve the catalytic performance in CO
2
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2
hydrogenation to light olefins. The addition of Mn to the Na/Fe catalysts significantly improves the selectivity of light olefins and reduces the C
5+
selectivity. The catalyst exhibiting optimal catalytic performance, 5Mn–Na/Fe, shows a CO
2
conversion of 38.6% with high selectivity of light olefins (30.2%), high O/P ratio (7.5), and low selectivity of methane (11.8%) and CO (11.7%). XRD and Mössbauer spectra indicate that the addition of Mn to Na/Fe catalysts facilitates the formation of active Fe
5
C
2
species. Besides, the strong interaction between the Mn promoter and Fe species is revealed by the Mössbauer spectra, XRD and XPS, which lowers the amount and strength of CO adsorption, and consequently contributes to the weakening of the chain-growth reaction leading to the high selectivity of light olefins. This work can provide guidance for catalyst design through the modulation of the ability of the chain-growth reaction to improve the catalytic performance in CO
2
hydrogenation.</abstract><doi>10.1039/C8CY02275E</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0001-9470-7215</orcidid><orcidid>https://orcid.org/0000-0002-3647-7703</orcidid><orcidid>https://orcid.org/0000-0002-7556-317X</orcidid></addata></record> |
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| source | Royal Society Of Chemistry Journals |
| title | Mn decorated Na/Fe catalysts for CO 2 hydrogenation to light olefins |
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