2024-03-28T12:42:44Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1822152019-07-09T11:00:16Zcom_10261_101com_10261_5col_10261_354
2019-05-23T13:06:57Z
urn:hdl:10261/182215
Insights into the deactivation and reactivation of Ru/TiO2 during Fischer-Tropsch synthesis
González Carballo, Juan M.
Finocchio, Elisabetta
Ojeda Pineda, Manuel
García Fierro, José Luis
Busca, G.
Rojas Muñoz, Sergio
García-Rodríguez, Sergio
Ministerio de Educación (España)
Ministerio de Ciencia e Innovación (España)
Comunidad de Madrid
Coke
In situ FTIR
Deactivation
Fischer–Tropsch
Ru
The catalytic performance of Ru/TiO2 for the production of hydrocarbons via Fischer–Tropsch synthesis (FTS) has been evaluated in this work. Ru/TiO2 exhibits high CO conversion rates (523 K, 2.5 MPa H2, 1.25 MPa CO) that decrease significantly with time-on-stream. To recover the initial catalytic performance, different treatments using H2 or air have been tested. The evolution of the catalyst structure during FTS and after the re-activation protocols have been explored by a combination of ex situ and in situ techniques. Ru agglomeration, oxidation, and formation of Ru–volatile species are not responsible for the observed deactivation. However, Raman and infrared (FTIR) spectroscopy have confirmed the presence of coke and alkyl chains on the spent catalysts. These species hinder the adsorption of the reactants on the active sites and are the primary reason for the observed decrease in the catalytic activity. These carbonaceous species can be removed by severe thermal treatments in air. However, this latter treatment drastically alters the morphology of the Ru/TiO2, which leads to a substantial loss of catalytic activity.
2019-05-23T13:06:57Z
2019-05-23T13:06:57Z
2013-10-01
2019-05-23T13:06:58Z
artículo
Catalysis Today 214: 2-11 (2013)
0920-5861
http://hdl.handle.net/10261/182215
10.1016/j.cattod.2012.09.018
http://dx.doi.org/10.13039/501100004837
http://dx.doi.org/10.13039/100012818
eng
https://doi.org/10.1016/j.cattod.2012.09.018
Sí
S2009/ENE-1743
closedAccess
Elsevier