Transport hindrances with electrodialytic recovery of citric acid from solution of strong electrolytes

被引：25

作者：

Chandra, Anusha ^{[1
]}

Tadimeti, Jogi Ganesh Dattatreya ^{[2
]}

Chattopadhyay, Sujay ^{[1
]}

机构：

[1] IIT Roorkee, Dept Polymer & Proc Engn, Saharanpur Campus, Saharanpur 247001, India

[2] Swamandhra Coll Engn & Technol, Dept Mech Engn, Seetarampuram 534280, India

来源：

CHINESE JOURNAL OF CHEMICAL ENGINEERING | 2018年 / 26卷 / 02期

关键词：

Electrodialysis; Adsorption; Electrolytes; Recovery; Chronopotentiometry; AFM; ANION-EXCHANGE MEMBRANE; LACTIC-ACID; ION; FERMENTATION; SEPARATION; BEHAVIOR;

D O I：

10.1016/j.cjche.2017.05.010

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Electrodialytic (ED) recovery of citric acid (CA) in the presence/absence of strong electrolytes (NaCl, CaCl2 and FeCl3) was separately analyzed under different process conditions. Recovery effectiveness was quantitatively estimated from current efficiency values. Efficiency attained optimum value with both flow rate and potential applied, while a monotonic rise was noted with temperature which got lowered beyond 0.1 mol.L-1 feed concentration. 40% drop in efficiency was recorded in the presence of strong electrolytes (NaCl, CaCl2 and FeCl3) in feed relative to their presence in concentrate. Severe transport hindrance and efficiency loss were attributed to adsorption and allied physicochemical changes occurred with anion/cation exchange membranes (AEM/CEM) and these were confirmed through contact angle/Chronopotentiometry/AFM/EDX. Sluggish potential rise (Galvanostatic mode) in Chronopotentiometric analysis indicated diffusion limiting transport of organic acids influenced AEM resistance. XRD and EDX analysis indicated the presence of salt hydrates/ions (Ca2+/Fe-3+) over CEM justifying the resistance buildup due to adsorption of multivalent metal ion(s) and salts. (C) 2017 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.

引用

页码：278 / 292

页数：15

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