Catalytic conversion of carbon dioxide into hydrocarbons over zinc promoted iron catalysts

Effects of Zn and Mn Promotion in Fe-Based Catalysts Used for COx Hydrogenation to Long-Chain Hydrocarbons

“…As a matter of fact, by using the FeZnCuK catalyst, we measured a CO 2 conversion of 9.3%, while the FeMnCuK sample resulted in a CO 2 conversion of 7.5%. These results fully agree with those obtained by Nam et al, , who reported a similar relative increase in the catalyst activity (+15%) when replacing Mn with Zn in K-free and Cu-free catalysts. We believe that the motivation of the different reactivity of the two catalysts is the different surface basicity of the two samples, which in turn depends on the electronic effects of Mn and Zn.…”

“…The comparison of the catalytic performance of Zn- and Mn-promoted Fe-based samples in CO and CO 2 hydrogenation is a topic only partially addressed in the literature. − With the scope of identifying the most effective promoter, in this work, the effects of Zn or Mn incorporation in the structure of a Fe-based catalyst prepared via coprecipitation are comparatively studied during CO x hydrogenation at low temperature and high pressure. In particular, the effects of the presence of these promoters are investigated on CO x conversion and product selectivity under both transient and steady-state conditions.…”

Fischer–Tropsch Synthesis by Carbon Dioxide Hydrogenation on Fe-Based Catalysts

“…The study was aimed at understanding the promotional effects of V, Cr, Mn and Zn on Fe [15]. The catalysts were prepared by co-precipitation method with the atomic ratio of Fe to promoted metal as 9:1.…”

CO2 Hydrogenation to Olefin-Rich Hydrocarbons Over Fe-Cu Bimetallic Catalysts: An Investigation of Fe-Cu Interaction and Surface Species

“…However, monometallic Fe catalysts often exhibit low CO 2 conversion and primarily produce methane (Wang et al, 2018). To improve CO 2 conversion and C 2 + selectivity, different promoters have been evaluated (Nam et al, 1997;Yan et al, 2000;Riedel et al, 2001;Ngantsoue-Hoc et al, 2002;Lögdberg et al, 2009;Dorner et al, 2011;Satthawong et al, 2013a;Hu et al, 2013b;Satthawong et al, 2013b;Rodemerck et al, 2013;Fischer et al, 2015;Amoyal et al, 2017;Liu et al, 2018;Wei et al, 2018). For example, the use of CeO 2 increases both CO 2 conversion and olefin formation (Dorner et al, 2011).…”

“…For example, the use of CeO 2 increases both CO 2 conversion and olefin formation (Dorner et al, 2011). Adding V, Cr, Mn, and Zn can also increase CO 2 conversion by promoting generation of the iron carbide phase (Nam et al, 1997). Furthermore, the addition of alkali metals enhances catalytic activity as those substances can increase CO 2 uptake and facilitate Fe carburization (Riedel et al, 2001;Ngantsoue-Hoc et al, 2002;Fischer et al, 2015;Visconti et al, 2017).…”