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Absorption of carbon dioxide in aqueous colloidal silica solution with NaOH |
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| Authors: | Kyu-Suk Hwang Sang-Wook Park Dae-Won Park Kwang-Joong Oh Seong-Soo Kim |
| Affiliation: | (1) Department of Energy Science and Technology, Faculty of Energy Science, Graduate School of Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan;(2) Department of Materials-Process Engineering and Applied Chemistry for Environments, Faculty of Engineering and Resource Science, Akita University, 1-1 Tegata, Gakuen-machi, Akita 010-8502, Japan;(3) Emeritus professor of Kyoto University, Kyoto, Japan; |
| Abstract: | The absorption rate (R A ) of carbon dioxide was measured into an aqueous nanometer-sized colloidal silica solution of 0–31 wt% and NaOH of 0–2 kmol/m3 in a flat-stirred vessel for various sizes and speeds of 25 °C and 101.3 N/m2 to obtain the volumetric liquid-side mass transfer coefficient (k L a L ) of CO2. The film theory accompanied by chemical reaction between CO2 and NaOH was used to estimate the theoretical value of absorption rate of CO2. The empirical correlation formula containing the relationship between k L a L and rheological property of the aqueous colloidal silica solution was presented. The value of R A in the aqueous colloidal silica solution was decreased by the reduction of k L a L due to elasticity of the solution. |
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