Figure 6.

CO₂ methanation tests over Ni/CeO₂/carbon monolith catalysts prepared using 3D printing. (A) Influence of the porous texture of monoliths with conventional design on the catalytic performance. (B) Influence of the channels configuration on the CO₂ methanation reaction rate; both monoliths were prepared with resorcinol/water ratio = 1/17. (C) Isothermal test at 300 °C for the catalyst with advanced design prepared with resorcinol/water ratio =1/17. C_CO2 = CO₂ conversion and S_CH4 = Selectivity to methane. (D) Study of the stability of the catalysts after being reused in successive cycles. C_CO2: conversion of CO₂ at 300 °C.