| Abstract |
Generally, in the Fischer Tropsch synthesis experiments, the pivotal intermediate CHx(x = 1–3) are only regarded as the reactive species to participate into the reaction, and the other functions of CHx(x = 1–3) species are ignored. The experiment hardly identifies the microscopic function mechanism of CHx(x = 1–3) formed over the Co-based catalysts due to the dynamic change of CHx(x = 1–3) intermediate. Through DFT calculations and microkinetic modeling, this work illustrates the new mechanism of CHx(x = 1–3) adsorbed over Co catalyst (CHx(x = 1–3)/Co) to catalyze syngas-to-hydrocarbon for the first time. The produced CHx not only participates into the reactions as the reactive intermediate, but also performs the role of surface promoter to enhance the activity and selectivity toward CHx(x = 1–3) and C2 hydrocarbons. CH as the main monomer has the best promotion effect. Interestingly, the same things also occur in CO methanation over CHx(x = 1–3)/Ni catalysts, which is highly active and selective toward methane. Thus, the new mechanism of CHx(x = 1–3) intermediate as the catalytic assist located over the transition metal may be popularized in the other reaction systems. |
| Authors |
Zun Guan , Wen Zhao  , Debao Li , Qianqian Wang , Christopher K. Russell  , Maohong Fan , Riguang Zhang
|
| Journal Info |
Elsevier BV | Fuel , vol: 331
, pages: 125788 - 125788
|
| Publication Date |
1/1/2023 |
| ISSN |
0016-2361 |
Type |
article |
| Open Access |
closed
|
| DOI |
https://doi.org/10.1016/j.fuel.2022.125788 |
| Keywords |
Fischer-Tropsch Catalysts (Score: 0.564678)
|
