Syngas Production via Reverse Water‐Gas Shift Reaction over a Ni‐Al₂O₃ Catalyst: Catalyst Stability, Reaction Kinetics, and Modeling

Abstract

The synthesis of liquid fuels from CO 2 , e.g., separated from flue gases of power plants, and H 2 from renewables, i.e., water electrolysis, is a concept for substituting fossil fuels in the transport sector. It consists of two steps, syngas production via reverse water-gas shift (RWGS) and synfuel production by Fischer-Tropsch synthesis. Research is concentrated on the RWGS using a Ni-catalyst. The catalyst shows an appropriate performance in catalyzing the RWGS. The catalyst is stable at technically relevant temperatures. The intrinsic and effective kinetics were determined and considerations on a technical application of the process are proposed.

Recent Developments in the Modelling of Heterogeneous Catalysts for CO2 Conversion to Chemicals

“…As a support for different metal catalysts Al 2 O 3 , CeO 2 , TiO 2 and SiO 2 are primarily examined. Ni−Al 2 O 3 catalyst was investigated by Wolf et al . They achieved the CO 2 equilibrium conversion of 80 % at 900 °C and proved the catalyst's stability at 900 °C.…”

“…Pt−O v −Ti 3+ species formed at the interface between Pt and reducible TiO 2 support was identified as the active sites for the formation of CO, while large Pt particles facilitated the hydrogenation of CO to CH 4 . Dai et al . studied the RWGS reaction on mesoporous M−CeO 2 catalysts.…”

“…[86,87] As a support for different metal catalysts Al 2 O 3 , CeO 2 , TiO 2 and SiO 2 are primarily examined. NiÀ Al 2 O 3 catalyst was investigated by Wolf et al [88] They achieved the CO 2 equilibrium conversion of 80 % at 900°C and proved the catalyst's stability at 900°C. TIO 2 was investigated in combination with Pt at 200-500°C by Chen et al [89] PtÀ O v À Ti 3 + species formed at the interface between Pt and reducible TiO 2 support was identified as the active sites for the formation of CO, while large Pt particles facilitated the hydrogenation of CO to CH 4 .…”

“…TIO 2 was investigated in combination with Pt at 200-500°C by Chen et al [89] PtÀ O v À Ti 3 + species formed at the interface between Pt and reducible TiO 2 support was identified as the active sites for the formation of CO, while large Pt particles facilitated the hydrogenation of CO to CH 4 . Dai et al [88] studied the RWGS reaction on mesoporous MÀ CeO 2 catalysts. According to their results, CO 2 RWGS reaction catalytic activities decrease in the order NiÀ CeO 2 > CuÀ CeO 2 > CoÀ CeO 2 > FeÀ CeO 2 � MnÀ CeO 2 .…”

Effect of Copper‐based Catalyst Support on Reverse Water‐Gas Shift Reaction (RWGS) Activity for CO2 Reduction

“…If excess hydrogen is used in this process and water is removed from the product stream, the resulting gas is a mixture of CO and H 2 (syngas), which can be converted to liquid chemicals by the Fischer‐Tropsch or methanol synthesis process . This process is most effective when excess electrical energy from renewable resources is used .…”