Fig. 6

Extended stability test of the best palladium-promoted In₂O₃ catalyst. Evolution of the catalytic performance of the CP catalyst during a 500-h test conducted under optimized reaction conditions: T = 553 K, P = 5 MPa, H₂:CO₂ = 4, and WHSV = 48,000 cm³_STP h⁻¹ g_cat⁻¹