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http://dx.doi.org/10.7464/ksct.2018.24.4.280

A Study on the Evaluation of Adsorption Characteristics of VOCs on TiO2 and Al2O3 and Investigation of the Thermal Durability by Molding Various Structures  

Hwang, In-Hyuck (Department of Environmental Energy Engineering, Graduate school of Kyonggi University)
Lee, Sang Moon (Department of Environmental Energy Systems Engineering, Kyonggi University)
Kim, Sung Su (Department of Environmental Energy Systems Engineering, Kyonggi University)
Publication Information
Clean Technology / v.24, no.4, 2018 , pp. 280-286 More about this Journal
Abstract
In this study, the adsorption performance of vapor phase VOCs under dry conditions was evaluated by using two metal oxides, $TiO_2$ powder and $Al_2O_3$ powder. BET analysis and ammonia in-situ FT-IR analysis were used to analyze specific surface area and surface acid site. As a result, $TiO_2$ powder and $Al_2O_3$ powder had a specific surface area of $317.6m^2\;g^{-1}$ and $64m^2\;g^{-1}$, respectively. In the case of $TiO_2$ 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, $TiO_2$ 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 $TiO_2$ 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.
Keywords
Volatile organic compounds; Metal oxide; Adsorbents;
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