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STUDY OF THE HYDROLYSIS REACTION OF THE COPPER-CHLORIDE HYBRID THERMOCHEMICAL CYCLE USING OPTICAL SPECTROMETRIES
Figure 9: Dehydration of CuCl 2 , 2H 2 O: water loss versus time
0.4
0.35
0.3
Absorbance
0.25
0.2
0.15
0.1
0.05
Absorbance à 5345 cm-1
0
0 10 20 30 40 50 60 70
time UA
Figure 10: Hydrolysis reaction monitored using FTIR
spectrometry: H 2 O and HCl concentrations versus time
1.60E+00
1.40E+00
1.20E+00
HCL(%)
H2O (%)
Concentration [%v]
1.00E+00
8.00E-01
6.00E-01
4.00E-01
2.00E-01
0.00E+00
-15 5 25 45 65 85 105 125
-2.00E-01
time (UA)
Conclusions
In order to assess the viability of the copper-chloride hybrid thermochemical cycle, a dedicated
experimental programme has been conducted. The existence of side reactions giving rise to molecular
chlorine has been demonstrated.
A careful control of the temperature of the hydrolysis reaction enables a complete formation of
Cu 2 OCl 2 .
To have a better control of the kinetics of the hydrolysis reaction, the use of FTIR spectrometry
enablea to follow H 2 O and HCl concentrations versus reaction time. It is used to first monitor CuCl 2
dehydration and then control the hydrolysis reaction by following H 2 O and HCl concentrations versus
reaction time.
Future developments will be focused on oxygen measurement in the high temperature reaction
of the cycle using if possible optical absorption technique.
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