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[Display omitted] • Nickel-lithium-silicate (Ni/LS) was developed for sustainable CH 4 production. • The Ni/LS captured CO 2 from the simulated flue gas (10% CO 2 and 10% H 2 O). • Decarbonation rate of Ni/LS was significantly improved, according to the Le Chatelier's principle. • The Ni/LS exhibited excellent multicycle stability in a cyclic system. Sustainable CH 4 production in CO 2 green technology has been recently proposed to mitigate climate emergency and to utilize waste sources of CO 2 in the industry, reducing the total thermal energy. However, earlier studies have focused primarily on the CO 2 capture capacity and CH 4 productivity, and have not elucidated the kinetics of CO 2 capture and CH 4 production. Here, we prepared a nickel-lithium-silicate (Ni/LS) catal-sorbent by solid state reaction, which is one of the highly scalable synthesis method. The Ni/LS shows the high CO 2 capture capacity and CH 4 productivity with multicycle stability at 550 °C and the carbonated Ni/LS catal-sorbent is regenerated completely at lower temperature than that of conventional decarbonation. Moreover, the decarbonation rate of the carbonated Ni/LS catal-sorbent is enhanced significantly according to the Le Chatelier's principle, enabling the excellent working CO 2 capture capacity and CH 4 productivity with multicycle stability in a rapid cyclic system without temperature or pressure swings. [ABSTRACT FROM AUTHOR]