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Issue
Korean Journal of Chemical Engineering,
Vol.27, No.5, 1570-1575, 2010
Absorption of carbon dioxide in aqueous colloidal silica solution with NaOH
Hwang KS, Park SW, Park DW, Oh KJ, Kim SS
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 ℃ 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 kLaL 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.
Keywords: Absorption; NaOH; Carbon Dioxide; Silica; Viscoelastic Liquid
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