Recovery of volatile fatty acids by reactive extraction using tri-n-octylamine and tri-butyl phosphate in different solvents: Equilibrium studies, pH and temperature effect and optimization using multivariate Taguchi approach

Eda, S, Kumari, A, Thella, P, Satyavathi, B and Parthasarathy, R 2017, 'Recovery of volatile fatty acids by reactive extraction using tri-n-octylamine and tri-butyl phosphate in different solvents: Equilibrium studies, pH and temperature effect and optimization using multivariate Taguchi approach', The Canadian Journal of Chemical Engineering, vol. 9999, pp. 1-16.


Document type: Journal Article
Collection: Journal Articles

Title Recovery of volatile fatty acids by reactive extraction using tri-n-octylamine and tri-butyl phosphate in different solvents: Equilibrium studies, pH and temperature effect and optimization using multivariate Taguchi approach
Author(s) Eda, S
Kumari, A
Thella, P
Satyavathi, B
Parthasarathy, R
Year 2017
Journal name The Canadian Journal of Chemical Engineering
Volume number 9999
Start page 1
End page 16
Total pages 16
Publisher Wiley-Blackwell
Abstract Recovery of volatile fatty acids from fermentation broth has been investigated by adopting an intensified approach using extractants tri-n-octylamine and tri-butyl phosphate dissolved in 1-decanol and methyl isobutyl ketone. The effects on distribution coefficient (K_D) and extraction efficiency (%E) were studied by varying the operating conditions like temperature (293.15-323.15) K, pH (2.5, 3.5 and 4.5) and compositions of extractant (10, 20 and 30%).Taguchi (L_36) orthogonal design with five factors namely diluents, extractant type and composition, temperature and pH were employed for the multivariate optimization of reactive extraction of volatile fatty acids. In Taguchi approach, "Larger is better" criterion was adopted to maximize K_D and % E. The statistical analysis indicated that the degree of influence on K_D by experimental variables follows the trend: extractant type (X_2) > pH (X_5)> diluent type (X_1) > temperature (X_4) > extractant concentration (X_1). The trend for % E observed is: extractant type (X_2) > pH (X_5) >temperature (X_4) >extractant concentration (X_1) > diluent type (X_1).The combination of optimum parameters were obtained as(X1= 1-decanol, X2= tri-n-octylamine, X3= 20%, X4= 293.15 K and X5=3.5).A confirmation run was conducted using these parameters and K_D and % E values from this run were determined to be 8.65 and of 89.64%, respectively, which were very close to the predicted values 〖 K〗_D=10.36 and % E =91.26%.
Subject Membrane and Separation Technologies
Keyword(s) Reactive extraction
Volatile fatty acids
TOA
TBP
pH
desirability approach.
DOI - identifier 10.1002/cjce.22803
Copyright notice © 2017 Canadian Society for Chemical Engineering
ISSN 1939-019X
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