Efficient CO2 methanation using nickel nanoparticles supported mesoporous carbon nitride catalysts
Zakaria Refaat, Mohamed El Saied, Ahmed O. Abo El Naga, Seham A. Shaban, H.B. Hassan, Mohamed R. Shehata, Fathy Y. El Kady
Abstract
Abstract The CO 2 methanation technique not only gives a solution for mitigating CO 2 emissions but can also be used to store and convey low-grade energy. The basic character and large surface area of mesoporous carbon nitride, (MCN), are considered promising properties for the methanation of CO 2 . So, a series (5–20 wt.%) of Ni-doped mesoporous carbon nitride catalysts were synthesized by using the impregnation method for CO 2 methanation. the prepared catalysts were characterized by several physicochemical techniques including XRD, BET, FT-IR, Raman spectroscopy, TEM, TGA analysis, Atomic Absorption, H 2 -TPR, and CO 2 -TPD. The catalytic performance was investigated at ambient pressure and temperature range (200–500 °C) using online Gas chromatography system. The prepared catalysts showed good performance where 15%Ni/MCN exhibited the best catalytic conversion and methane yield with 100% methane selectivity at 450 °C for investigated reaction conditions.