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Chemical and Biochemical Engineering Quarterly, Vol.31 No.4 Siječanj 2018.

Izvorni znanstveni članak
https://doi.org/10.15255/CABEQ.2016.859

Reactive Extraction of Citric Acid Using Different Extractants: Equilibrium, Kinetics and Modeling

N. Thakre ; Department of Chemical Engineering, IIT Kharagpur – 721302, India
D. Datta ; Department of Chemical Engineering, MNIT Jaipur – 302017, India
A. K. Prajapati ; Department of Chemical Engineering, IESI, Indore – 452012, India
P. K. Chaudhari ; Department of Chemical Engineering, NIT Raipur, Raipur – 492010, India
D. Pal ; Department of Chemical Engineering, NIT Raipur, Raipur – 492010, India

Puni tekst: engleski, pdf (769 KB) str. 437-446 preuzimanja: 26* citiraj
APA
Thakre, N., Datta, D., Prajapati, A.K., Chaudhari, P.K., Pal, D. (2017). Reactive Extraction of Citric Acid Using Different Extractants: Equilibrium, Kinetics and Modeling. Chemical and Biochemical Engineering Quarterly, 31(4). doi:10.15255/CABEQ.2016.859

Sažetak
Recovery of citric acid from biotechnologically produced low concentration aqueous solution has attracted several separation techniques for the downstream processing. Amongst them, reactive extraction is a convenient, cheap, and effective method. Three
different extractants are used in this study, namely tri-n-butyl phosphate (TBP), tri-n-octylamine (TOA), and Aliquat 336 (A336), all diluted in methyl-iso-butyl ketone (MIBK). The isothermal batch experiments were performed for the equilibrium and kinetic studies
at T = 300.15±1 K. Around 92 % extraction efficiency (E %) was obtained using 20 % (v/v) TOA in MIBK. Based on the overloading of amine (Z > 0.5), (2:1) acid:extractant complex in TOA+MIBK phase was proposed. Kinetics of extraction of citric acid (0.2–0.8 kmol m–3) was also performed in a Lewis-type stirred cell, using TOA in MIBK.
The extraction reaction was occurring in the diffusion film. The second order rate constant was calculated as k2 = 0.0351 m3 kmol–1 s–1. The extraction parameters were estimated by differential evolution optimization technique. Optimal value of equilibrium constant,
KE, was found to be 3.6 · 10–3 (m3 kmol–1)2, for the reactive extraction of citric acid using 20 % TOA in MIBK, and was found in close agreement with experimental values.






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This work is licensed under a Creative Commons Attribution 4.0 International License.

Ključne riječi
reactive extraction; citric acid; differential evolution; modeling; equilibrium; kinetics

Hrčak ID: 192300

URI
https://hrcak.srce.hr/192300

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