Hwang IH  Lee SM  Kim SS

Vol. 24,  No. 4, pp. 280-286, Dec.  2018
10.7464/ksct.2018.24.4.280

Volatile organic compounds Metal oxide Adsorbents

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In this study, the adsorption performance of vapor phase VOCs under dry conditions was evaluated by using two metaloxides, TiO2 powder and Al2O3 powder. BET analysis and ammonia in-situ FT-IR analysis were used to analyze specific surface area and surface acid site. As a result, TiO2 powder and Al2O3 powder had a specific surface area of 317.6 m2 g-1 and 64 m2 g-1, respectively. In the case of TiO2 powder, many acid sites were observed on the surface. As a result of evaluating the vapor phase VOCs adsorption performance using two metal oxide powders, TiO2 powder having a relatively large specific surface area and a large number of acid sites exhibited relatively good adsorption performance. In particular, it is considered that the specific surface area directly affects the adsorption performance, and further study on the effect of the acid site is required. Based on the TiO2 exhibited excellent adsorption performance, it manufactured into various forms of honeycomb, hollow fiber and disc. As a result, the adsorption performance was lower than that of the powder, but it is advantageous in view of applicability. In addition, it was confirmed that the disc adsorbent having excellent thermal durability due to the characteristics of the manufacturing process stably maintains adsorption performance even at a high temperature desorption process several times.