To mitigate climate change on earth because of the increasing emission of greenhouse gases, this has motivated the research of preparation of materials for CO2 capture and generating new technologies that reduce their emission into the atmosphere. Herein, nanotubular structures of TiO2 mesoporous were prepared through a hydrothermal process. The modification of time and temperature of the reaction, as like as reaction medium and calcination temperature during TiO2 nanotubes synthesis, were the key factors to modify the surface, morphology, and textural properties of the nanomaterial.The TiNTs were characterized by Scanning Electron Microscopy (SEM), N2 adsorption isotherms, X-Ray Photoelectron Spectroscopy (XPS), among others. The synthesis method significantly influenced both the surface area and the capacity of CO2 adsorption. The capture of CO2 in the post-combustion process of natural gas was evaluated using TiO2 nanotubes with a synthetic mixture in the gas streams using different percentages of CO2 (4, 6, and 8 mol%). The highest accumulated capture capacity observed was 52.54 mg of CO2/g of adsorbent by TiNTs-150-7-72 sample due to larger pore sizes and higher formation of nanotubes in comparison to the others TiNTs. CO2 capture was also measured using a steam self-generating kettle at 208.3 °C. TiNTs-150-7-72 sample captured the higher quantity of CO2 than TiNTs -110-1-72; these results were in agreement with the capture of CO2 when it used a synthetic mixture of natural gas.