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http://dx.doi.org/10.5322/JES.2011.20.2.223

Toluene Desorption of Modified Activated Carbon for Microwave Irradiation  

Choi, Sung-Woo (Department of Environmental Science and Engineering, Keimyung University)
Chu, Heon-Jik (Department of Environmental Science and Engineering, Keimyung University)
Publication Information
Journal of Environmental Science International / v.20, no.2, 2011 , pp. 223-229 More about this Journal
Abstract
Toluene desorption of modified activated carbon for microwave irradiation was evaluated. As a virgin GAC reacted from microwave energy, it created an "arcing" between GAC particles in desorption process. The arcing became more and more vigorous and achieved a red flame of GAC. The silica coated GAC(Si/GAC) was developed to prevent arcing phenomenon and temperature control problem. The result shows virgin GAC with 5wt%, 10wt% and 20wt% silica had no arcing and could control temperature very well. However, the adsorption rate of Si/GAC was decreased by coated silica amount due to decreasing surface area of GAC. The 5wt% Si/GAC adsorption rate was quite similar to virgin GAC adsorption rate. After adsorption, the toluene-loaded GAC and Si/GAC was reactivated by 2450MHz MW irradiation with 300W for 5 min. Quantitative desorption of the toluene was achieved at MW irradiation at 300W with desorption efficiencies as high as 98.59% to 84.65%% after four cycles.
Keywords
Microwave; Desorption; Si/GAC; GAC;
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Times Cited By KSCI : 1  (Citation Analysis)
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