Recovery of amino acids from reverse micellar solution by gas hydrate

Date

2008-02-01

Author

Bayraktar, Emine
Kocapicak, Oezlem
Mehmetoglu, Uelkue
Parlaktuna, Mahmut
Mehmetoglu, Tanju

Metadata

Show full item record

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

Item Usage Stats

196
views

0
downloads

The back extraction of amino acids from reverse micelle phase was investigated through gas hydrate formation. Three amino acids, namely L-aspartic acid, L-serine and L-phenylalanine having different hydrophobicity were used to model the amino acid solution. Back extraction of these amino acid solutions were studied with the help Of CO2 hydrate formation in a high-pressure reactor. The yield of extraction increased from 26% to 99% for L-aspartic acid, from 22% to 82% for L-serin and from 19% to 63% for L-phenylalanine by increasing water to surfactant (Aliquat 336) molar ratio, W-0, from 20 to 50. The yield of amino acid obtained from fermentation process (57%) is lower than the synthetically prepared amino acid solution (99%). Kinetics of hydrate formation was determined as a first order kinetic model. It was determined that there exists a direct correlation between hydrophobicity of the amino acid solvent and initial reaction rate constant. (c) 2007 The Institution of Chemical Engineers. Published by Elsevier B.V All rights reserved.

Subject Keywords

General Chemistry, General Chemical Engineering

URI

https://hdl.handle.net/11511/45708

Journal

CHEMICAL ENGINEERING RESEARCH & DESIGN

DOI

https://doi.org/10.1016/j.cherd.2007.12.001

Collections

Department of Petroleum and Natural Gas Engineering, Article

Suggestions

OpenMETU
Core

Synthesis of alpha-Fe2O3/TiO2 heterogeneous composites by the sol-gel process and their photocatalytic activity Bouziani, Asmae; PARK, JONGEE; Öztürk, Abdullah (Elsevier BV, 2020-09-01) alpha-Fe2O3/TiO2 heterogeneous composites were synthesized by the sol-gel process to increase the photocatalytic activity of TiO2. The structural, morphological, and optical characteristics of the composites were determined by X-ray diffraction, scanning electron microscope, and UV-vis diffuse reflectance spectroscopy. Results revealed that the incorporation of alpha-Fe2O3 to TiO2 widened the visible light absorption ability of TiO2. It was realized that the calcination temperature plays a crucial role in m...
Electrospun amino-functionalized PDMS as a novel SPME sorbent for the speciation of inorganic and organometallic arsenic species Boyacı, Ezel; Cagir, Ali; Demir, Mustafa M.; Eroglu, Ahmet E. (Royal Society of Chemistry (RSC), 2013-01-01) Sol-gel based amine-functionalized SPME fibers (PDMS-weak anion exchanger) were prepared and used for direct mode extraction of dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), and arsenate (As(V)) from aqueous solutions followed by HPLC-ICPMS determination. Two different methods of coating were employed: (i) electrospinning and (ii) dip coating. Electrospinning was used for the first time for preparation of sol-gel based SPME fibers and was found to be superior in terms of extracted amount of arse...
Effects of pH, Initiator, Scavenger, and Surfactant on the Ozonation Mechanism of an Azo Dye (Acid Red-151) in a Batch Reactor Oezbelge, Tuelay A.; Erol, Funda (Informa UK Limited, 2009-01-01) In this study, an initiator (Fe2+) and a scavenger (CO32(-)) were used at different concentrations in a batch reactor to investigate the reaction mechanism of ozonation of a model azo dye, namely Acid Red-151 (AR-151). Also, the effect of a nonionic surfactant known as a major pollutant in many industrial wastewaters, namely polyethylene glycol (PEG), was observed on the degradation rate of AR-151. The experimental parameters and their ranges were: pH (2.5-10), initiator (0.8-50mg/L of Fe2+), surfactant (10...
Characterization of BPN Pyrotechnic Composition Containing Micro- and Nanometer-Sized Boron Particles Koc, Suzan; Ulaş, Abdullah; Yilmaz, Nil Ezgi (Wiley, 2015-10-01) The effect of micro- and nanometer-sized boron particles on boron-potassium nitrate (BPN) ignition composition was investigated in this paper. As a starting point, thermochemical calculations were made to determine the most promising ignition compositions. Both stoichiometric and fuel-rich formulations of BPN were produced to observe the performance variation due to boron content. Particle morphology of boron particles and the surface structure of the ignition compositions were investigated by SEM. The infl...
Synthesis and polymerization of 2-and 3-substituted thiophene derivatives linked by polyether bridges Tirkeş, Süha; Önal, Ahmet Muhtar (Elsevier BV, 2004-11-15) New compounds consisting of 2- and 3-thienyl units linked by polyether bridges have been synthesized and their electrochemical polymerization was performed via constant potential electrolysis (CPE) in an electrolytic solution containing 0.1 M tetrabutylammonium hexafluorophosphate (TBAPF(6)) dissolved in CH3CN. 2-Thienyl monomers (I and II), but not 3-thienyl monomers (III and IV), were also polymerized via chemical oxidation, which yielded broken pi-conjugated polymer products. The polymers were characteri...

Citation Formats

E. Bayraktar, O. Kocapicak, U. Mehmetoglu, M. Parlaktuna, and T. Mehmetoglu, “Recovery of amino acids from reverse micellar solution by gas hydrate,” CHEMICAL ENGINEERING RESEARCH & DESIGN, pp. 209–213, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/45708.