N. A. A., F., J. A. A., R. A. F. A., H. H. U., and H. I. “CO2 Methanation over Mesoporous Silica Based Catalyst: A Comprehensive Study”. Journal of Energy and Safety Technology (JEST), vol. 2, no. 2, Dec. 2019, doi:10.11113/jest.v2n2.51.