Carbon recycling system through methanation of CO2 in flue gas in LNG power plant

A bench scale test at ambient pressure has been performed for carbon recycling system using a ferrite process in LNG power plant. The chemical reaction consists of two steps; (i) adsorptive separation and decomposition of CO 2 to carbon on oxygen-deficient Ni ferrite and (ii) methanation of deposited carbon. CO 2 decomposition and methanation reactivities were much improved when the honeycomb support was used instead of a packed-bed-type reactor. The overall methanation rate of CO 2 in flue gas from LNG power plant could achieve 1,000 Nm 3 h -1 when 12,000 kg Ni ferrite loaded on a honeycomb support was used. The present methanation and carbon recycling system could be extended to other CO 2 sources such as IGCC power plant and depleted natural gas plant.