Inversion of sucrose solution by ion exchange: evaluation of reaction rate and diffusivity

✍ Scribed by S.H. Khan; K. Rahman

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 344 KB
• Volume: 61
• Category: Article
• ISSN: 0923-0467
• DOI: 10.1016/0923-0467(96)02978-8

✦ Synopsis

The inversion of sucrose solution was studied in a packed bed of strongly acidic cation exchange resins in order to determine the values of the reaction rate constant, effective diffusivity and distribution coefficients for 20,30 and (40 \mathrm{wt} . %) solution concentration. Typical values of specific rate constant for (30 \mathrm{wt} . %) sucrose solution varied from 0.0115 to (0.7391 \mathrm{~min}^{-1}) in the temperature range from 30 to (70^{\circ} \mathrm{C}). The intrinsic values of activation energy and Arrhenius constant were (24.93 \mathrm{kcal} \mathrm{mol}^{-1}) and (7.657 \times 10^{15} \mathrm{~min}^{-1}) respectively. The effective diffusivity varied from (3.826 \times 10^{-8}) to (18.951 \times 10^{-8} \mathrm{~cm}^{2} \mathrm{~s}^{-1}) for the above concentration and temperature intervals. The distribution coefficient was about unity. It was found that liquid film mass transfer resistance was important at low flow rates, although the solution concentration was high.