Effect of Fe‐Containing Supports Prepared by a Novel Sol–Gel Method in the CO Methanation Reaction: CO Elimination and Synthetic Natural Gas Production
Sie können Bookmarks mittels Listen verwalten, loggen Sie sich dafür bitte in Ihr SLUB Benutzerkonto ein.
Medientyp:
E-Artikel
Titel:
Effect of Fe‐Containing Supports Prepared by a Novel Sol–Gel Method in the CO Methanation Reaction: CO Elimination and Synthetic Natural Gas Production
Beschreibung:
<jats:sec><jats:label /><jats:p>Herein, the CO methanation reaction is studied over Ni/Fe–Al mixed oxides with various Fe and Al contents. The mesoporous nanocrystalline supports are prepared by a novel sol–gel process using propylene oxide as a gelation agent. The deposition–precipitation method is used for the deposition of nickel on the catalyst support. The samples are characterized by Brunauer–Emmett–Teller (BET), X‐ray diffractometry (XRD), temperature programmed reduction (TPR), temperature programmed oxidation (TPO), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results indicate that increasing the iron content and reducing the Al percentage in the catalyst support reduces the specific surface area of the supports from 340 to 8 m<jats:sup>2</jats:sup> g<jats:sup>−1</jats:sup> and improves the reducibility of nickel in the prepared catalysts. The catalytic results of pre‐reduced catalysts show superior activity for CO elimination even at temperatures below 260 °C. The nonreduced catalysts reveal that the catalysts with a higher content of iron in the catalyst support show higher activity at lower temperatures. However, due to the lower thermal stability of iron oxide compared with that of aluminum oxide and exothermic nature of the CO methanation reaction, the catalysts with a higher content of iron exhibit lower stability during the reaction.</jats:p></jats:sec>