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Comparison of a single grain activated carbon and column adsorption system |
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| Authors: | Hung-Lung Chiang Jiun-Horng Tsai Gen-Mu Chang Yi-Chun Hsu |
| Affiliation: | a Department of Environmental Engineering, Fooyin University, Kaoshsiung, Taiwan b Graduate Institute of Environmental Engineering, National Cheng Kung University, Tainan, Taiwan c Department of Environmental Engineering and Health, Tajen Junior College of Pharmacy, En-Pu Hsiang, Pingtung Hsien, Taiwan |
| Abstract: | Results from a single grain activated carbon adsorption study indicate that the effective diffusion coefficient was from 0.65×10−6 to 7.4×10−6 cm2/s for H2S in the concentration range of 20–300 ppmv at 23 °C for both virgin activated carbon (FAC) and impregnated-regenerative activated carbon (IRAC). The effective diffusivity of the IRAC was nearly two times the FAC for H2S adsorption. The surface reaction of H2S-impregnated regenerative activated carbon was faster than that of H2S and virgin activated carbon. The single grain activated carbon kinetic curve and a time scale conversion method were used to predict the breakthrough curve and the adsorption capacity of the column adsorption system. The single grain activated carbon adsorption system measured the breakthrough curve more efficiently than column adsorption. The prediction error was between 10 and 30%. Improvement can be further achieved by enhanced experimental approaches. It has a great potential for scale-up. |
| Keywords: | A. Activated carbon C. Adsorption D. Diffusion |
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