CO2 reactivity on Fe–Zn–Cu–K Fischer–Tropsch synthesis catalysts with different K-loadings

The Effect of Copper Loading on Iron Carbide Formation and Surface Species in Iron‐Based Fischer–Tropsch Synthesis Catalysts

“…As imilar trend was observed for the 15/ 0.6 catalyst, although as light improvement in catalystp erformance was detected at 280 8C. [12,21] In agreement with the fixed-bed reactor experiments, 15/2 and 15/5 catalysts were more active towardsW GS especially at higher temperatures. The presenceo f XRD signals corresponding to Hägg carbide( Figure 5) could be associated with the improvement in CO conversion fort hose catalysts.…”

“…[4,9] Fe catalysts are attractive particularly because of their capacity to manage different syngas ratios, water gas shift( WGS) activity,t he ability to work at highert emperatures,l ower cost, and higher sulphur tolerance (< 0.2 ppm), although they have lower FTS activity compared to cobalt catalysts. [11][12][13] Whereast he active FTS phase (CO hydrogenation) is believed to be the carbidep hases, the WGS-RWGS sites are believed to be oxides species. [11] Thus, the properties of iron catalysts towards WGS are also critically important in determining the performance of Fe based catalysts for BTL applications.L ow-temperature Fe-based catalysts are reported to convert CO 2 effectively into high molecular weight hydrocarbons.…”

Selective formation of light olefins from CO2 hydrogenation over Fe–Zn–K catalysts

“…Among various transformation routes, the chemical conversion of CO 2 via hydrogenation has been considered as one of the most promising processes to produce chemicals such as methanol, higher alcohols and light olefins over modified Fischer-Tropsch synthesis (FTS) [1][2][3][4][5]. Direct synthesis of lower olefins from CO 2 hydrogenation is desired from the viewpoint of converting CO 2 to the building-block chemicals and has progressed in recent years [3,4].…”

“…The utilization of CO 2 as carbon feedstock to obtain highly added-value chemicals is of importance [1,2]. Among various transformation routes, the chemical conversion of CO 2 via hydrogenation has been considered as one of the most promising processes to produce chemicals such as methanol, higher alcohols and light olefins over modified Fischer-Tropsch synthesis (FTS) [1][2][3][4][5].…”

“…Traditional FTS catalysts such as iron-based catalysts has been used in CO 2 hydrogenation [1][2][3][4][5][6][7] due to high activity for both the water gas shift (WGS) and the reverse water-gas shift (RWGS) reactions during F-T synthesis [4,8,9]. CO 2 hydrogenation on iron catalysts has manifested to proceed via a two-step process with initial conversion of CO 2 to CO via the RWGS reaction followed by the conversion of CO to hydrocarbons via F-T synthesis [4,8].…”