Impact of the Operation Conditions on the Reverse-Water-Gas Shift Reaction

The reverse water gas shift (rWGS) reaction represents a key technology to realize an end-to-end power-to-liquid process chain. In this work, experimental tests of a nickel catalyst are reported. The influence of operating temperature (650–950 °C), pressure (ambient pressure up to 6 bara) and gas hourly space velocity (6000–40 000 h−1) on the conversion of CO2 and hydrogen is investigated. The results of this experimental evaluation show that the rWGS reaction favors high temperatures and low pressures. Thermodynamic equilibrium is approached with the used catalyst. Higher gas hourly space velocities favor the rWGS reaction and inhibit methane formation.