Catalytic Activity of Thermolyzed [Co(NH3)6][Fe(CN)6] in CO Hydrogenation Reaction

Abstract

Currently, the processes of obtaining synthetic liquid hydrocarbons and oxygenates are very relevant. Fischer-Tropsch synthesis (FTS) is the most important step in these processes. The products of thermal destruction in argon of the mixture [Co(NH3)6][Fe(CN)6] and Al(OH)3 were used as catalysts for CO hydrogenation. The resulting compositions were studied using powder X-ray diffraction, IR spectroscopy, elemental analysis, SEM micrographs. The specific surface area, pore and particle size distributions were determined. It was determined that the DCS-based catalysts were active in the high-temperature Fischer-Tropsch synthesis. The effect of aluminum in the catalyst composition on the distribution of reaction products was revealed.

CO2 Hydrogenation over Fe-Co Bimetallic Catalyst Derived from the Thermolysis of [Co(NH3)6][Fe(CN)6]

“…The surface of the material consists predominantly of carbon, which indicates the formation of carbon structures, consistent with Raman spectroscopy data and SEM data presented in [19]. Treatment with hydrogen leads to a decrease in nitrogen content, which may be due to the destruction of nitrogen-containing structures.…”

“…In addition, the second-order bands located in the range from 2457 to 3000 cm −1 are associated with a combination of modes/overtones, 2D, G', and D + G, which may indicate the presence of single-walled carbon nanotubes and graphene with a small number of layers in the structure [33]. The presence of closed carbon nanotubes in the catalyst was previously confirmed in [19] using scanning electron microscope(SEM). Peaks around 3235 cm −1 probably relate to symmetrical stretching vibrations of residual aliphatic nitriles (R-NH 3 ); the presence of a small amount of nitrogen is also confirmed by elemental analysis.…”

“…All reagents were purchased from Vecton. The elemental analysis, IR spectroscopy, and powder X-ray diffraction (XRD) results are the same as described in [19]. KBr was used, with a purity of 99.9 wt.…”

“…In the course of this work, the authors propose to use [Co(NH 3 ) 6 ][Fe(CN) 6 ] as a precursor for CO 2 hydrogenation. The thermolytic product of this compound has previously shown good catalytic properties [19]. CO conversion reaches 90%.…”