Synthetic silico-metallic mineral particles (SSMMP) containing different amounts of Ni (SSMMP-Ni) and SSMMP-Ni functionalized with different IL (SSMMP-Ni-IL) were obtained and successfully used as solid adsorbents for CO2 sorption, CO2/N2 separation and highly recyclable heterogeneous catalysts active in the synthesis of different cyclic carbonates using CO2 as a starting reagent. Samples were characterized by infrared spectroscopy (FTIR), RAMAN spectroscopy, X-ray diffraction (XRD), thermal analysis (TGA), specific surface area measurements (BET) and scanning electron microscopy (SEM). Samples containing IL demonstrated high CO2 capture capacity (1.18–1.91 mmol CO2/g adsorbent − 1 bar CO2), CO2 selectivity (7.5–14.7) and stability. As catalysts, SSMMP-Ni 50% achieved a yield of 93.3% in propylene carbonate production (20 bar, 100 °C and 7 h) and constant yield up to 10 cycles. These materials are easy to synthesize, with low energy demand, high stability and versatile to be used as adsorbent in CO2 capture and catalyst for CO2 transformation.