Reverse water gas shift (RWGS) over Ni – Spatially-resolved measurements and simulations

Mechanistic and multiscale aspects of thermo-catalytic CO2conversion to C1products

“…steam reforming, CO 2 methanation, and CO 2 hydrogenation to methanol) to gain new insights into the RWGS reaction system. 376,394 A detailed multi-step heterogeneous reaction mechanism developed for SRM, partial and total oxidation of methane, and RWGS, for Nibased catalysts was used by Benzinger et al 395 to interpret the experimental data obtained from the RWGS reaction in a monolith reactor. The microkinetic model, which included 42 reactions, 7 gas-phase species, and 12 surface species, was adjusted for thermodynamic consistency in the temperature range used for the study and validated with data derived from isothermal experiments in a fixed bed reactor over a commercial Ni/Al 2 O 3 catalyst.…”

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

“…The CO 2 methanation is exothermic, pressure dependent and is thermodynamically favorable at low temperatures (ΔG 298K =−130.8 kJ/mol). However, the reduction of the fully oxidized carbon to methane is an eight‐electron process (Equation 1 and 2) with significant kinetic limitations, which requires a catalyst to achieve acceptable rates and selectivity and makes the process kinetically favorable …”

“…However, the reduction of the fully oxidized carbon to methane is an eight-electron process (Equation 1 and 2) with significant kinetic limitations, which requires a catalyst to achieve acceptable rates and selectivity and makes the process kinetically favorable. [60,95]…”

“…Carbon monoxide formed by RWGS reaction is a feedstock or key intermediate for the production of methanol, hydrocarbon fuels via FTS and a building block for carbonylation reactions . The RWGS reaction is endothermic (Table ) and thermodynamically favored at high temperatures with pressure‐independent chemical equilibrium and direct gas‐phase reaction which makes it one of the most promising high‐temperature chemical reactions …”

Mechanochemical redox synthesis of interstitial mesoporous CoxFe1‐xOy catalyst for CO2 hydrogenation

“…Herein, Co x Fe 1‐ x O y has been prepared through simple ball milling (BM method), a facile mechanochemical redox method, and a series of catalysts with high surface area (131 m 2 g −1 ) was obtained, much higher than those of samples prepared via SG method (33 m 2 g −1 ) and CP method (49 m 2 g −1 ). The obtained‐catalysts were applied in the reverse water‐gas shift (RWGS) reaction, one of the most effective, essential, economical, and sustainable ways to utilize CO 2 waste by CO 2 hydrogenation 34,35 . The conversion rate of the hydrogenation catalyzed by Co x Fe 1‐ x O y in BM method was about 43% at 500 ℃, and the rates only reached 13.8% and 15.7% for the catalysts fabricated by SG method and CP method respectively under the same condition, indicating the mechanochemical redox process provides scope to extraordinary characteristics of the catalysts.…”