Separation of hydrochloric acid and glucose using electrodialysis
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Date
2007
Authors
Che Radzi, Nurhaslina
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Abstract
Electrodialysis (ED) is a method that shows a good potential to separate and
concentrate hydrochloric acid while unreacted glucose are partially recycled. Two
sections of experiment had been done; section A and section B. Section A of the
experiment was carried out using hydrochloric acid and glucose mixture with different
concentration of hydrochloric acid in feed and product stream; voltage supplied and
feed flow rate using anion-exchange membrane (PC Acid 60) and cation-exchange
membrane (PC-SK) in batch mode. The main parameters which quantify the
performance of the process are the duration of completing the separation, the
maximum recovery level of the acid, the average product flux, the current efficiency and
the energy consumption.
Section B of the experiment was done based on chosen effects from section A,
which were the concentration of hydrochloric acid in feed stream, the voltage supplied
and the feed flow rate, under constant parameters of concentration hydrochloric acid
(0.1M) in product stream and glucose concentration (5 g/l) in feed stream. This had
been done using design of experiment (DoE). A central composite design (CCD) and
response surface methodology (RSM) were used to obtain the optimum values of the
parameters.
It can be conclude that under optimum conditions (0.1M HCl in feed and product
stream, 1.47 mL/s of feed flow rate,voltage supplied of 21.21V and sampling time of
100 min), the best results of energy consumption, recovery percentage and average
flux were 37.93kW.h, 97.4% and 5.3kmol/m2.s.
Description
Master
Keywords
Science biology , hydrochloric acid , Glucose , electrodialysis