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| Kinetics of adsorption of oleic acid from soybean oil by alkaline clay |
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| KeyWord:alkaline clay adsorption oleic acid soybean oil kinetics |
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| Abstract: |
| The kinetics of adsorption of oleic acid from soybean oil by alkaline clay under the conditions of different water contents of alkaline clay，different adsorption temperatures and different initial contents of oleic acid of soybean oil was studied.The results showed that the adsorption process was in line with the quasi-second order kinetic equation with correlation coefficient R2 above 0.995 and the theoretical equilibrium adsorption capacity was close to the experimental value；the adsorption rate increased obviously with the water content of alkaline clay increasing；the adsorption rate constant hardly changed with the content of oleic acid of soybean oil increasing，which manifested chemical adsorption control；the adsorption rate constant increased while the balance adsorption capacity decreased with the adsorption temperature rising，which indicated that the adsorption was an exothermic process and manifested physical adsorption control. The activation energy of the adsorption was 70.7 kJ/mol，which was between physical adsorption and chemical adsorption. Therefore，the adsorption of oleic acid from soybean oil by alkaline clay was controlled by both chemical adsorption and physical adsorption. |
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