CO2 hydrogenation to methanol over Al2O3-supported Co, Mn OR Zn modified CuGa-LDH catalysts

CO2 hydrogenation to methanol is gaining wide attraction as a sustainable approach for carbon utilization. In this study, a cost-effective and highly efficient ZnCuGa-LDH/Al2O3 catalyst was innovatively synthesized to achieve a remarkable 19.54 % CO2 conversion under optimized conditions at 230 degrees C, 3.0 MPa and a space velocity of 3600 mL center dot gcat - 1 center dot h- 1. The catalyst also exhibits outstanding stability, maintaining consistent performance over 70 h of continuous operation with no marked deactivation. Detailed investigation of reaction parametric studies suggested 230 degrees C as the optimal temperature for maximizing catalytic activity. In-situ DRIFTS results prove the formate synthesis mechanism in CO2 hydrogenation pathway over the synthesized ZnCuGa-LDH/Al2O3 catalyst. This study highlights the potential future application of the ZnCuGa-LDH/Al2O3 catalyst for efficient and durable methanol production.