Preliminary Findings on CO[sub.2] Capture over APTES-Modified TiO[sub.2]

In this work, the impact of TiO[sub.2] properties on the CO[sub.2] adsorption properties of titanium dioxide modified with 3-aminopropyltriethoxysilane (APTES) was presented. The APTES-modified TiO[sub.2] materials were obtained by solvothermal process and thermal modification in the argon atmosphere. The prepared adsorbents were characterized by various techniques such as X-ray diffraction (XRD), Fourier transform infrared (DRIFT), thermogravimetric analysis and BET specific surface area measurement. CO[sub.2] adsorption properties were measured at different temperatures (0, 30, 40, 50 and 60 °C). Additionally, the carbon dioxide cyclic adsorption-desorption measurements were also investigated. The results revealed that modifying TiO[sub.2] with APTES is an efficient method of preparing CO[sub.2] sorbents. It was found that the CO[sub.2] adsorption capacity for the samples after modification with APTES was higher than the sorption capacity for unmodified sorbents. The highest sorption capacity reached TiO[sub.2] -4 h-120 °C-100 mM-500 °C sample. It was also found that the CO[sub.2] adsorption capacity shows excellent cyclic stability and regenerability after 21 adsorption-desorption cycles.