Sugar alcohols properties and performances (Alexandre Godin)

25 Pages·2015·1.48 MB·English

FP7 project - SAM.SSA
Sugar Alcohol based Materials for Seasonal Storage Applications

Workshop and Onsite Demonstration– CiCenergigune

Miñano, Alava, Spain
Sugar alcohols properties and
performances

Presented by Alexandre GODIN
Participants:
• CNRS-I2M: M. Duquesne,
A. Godin, R. Cadoret, E. Palomo

• SOLVAY: J. Daranlot,
R.Tadmouri, B. Pavageau

• TU/e: R.M.J van Wissen,
H. Zhang, S. V. Gaastraa-Nedea
• Screening and selection of
sugar alcohols (SA) and sugar
alcohol blends (SA-blend)
• Key thermodynamics and
physical properties of selected
SA and SA-blends
• Undercooling, probability of
spontaneous nucleation and
crystal growth rates
S
CREENING AND SELECTION

Starting point
Mono-Linear Mono-Cyclic Disaccharide
DATA BASE 160
30 polyols
140

Mono-, Disaccharide
Linear, ramified, cyclic, mix
) 120 Blends?
3
C-atoms: 3 – 12 m
/
h
W
Including most widely used polyols 100
k
(

m
h
 80
UPPER LIMIT
60
Defined by monosaccharide
polyols with linear chain
40
0 50 100 150 200 250 300
Melting point (°C)
Tm < 100°C HIGH LATENT HEAT
But LOW LATENT HEAT But Tm > 100°C
30 SA-based High temperature - High energy density components
Erythritol D-Mannitol Dulcitol Inositol
binary systems
D-Mannitol x
have been Dulcitol x x
investigated Inositol x x x
Glycerol x x x x
Xylitol x x x x
Looking for either
Adonitol x x x x
suitable eutectic
Sorbitol x x x x
points or suitable
Arabitol x x x x
molecular alloys
Maltitol x x x x
190
Phase diagram
180
determination
170

)C Fast method Fast estimation by infrared
° 160
( e Fast method thermography (new method)
ru DSC
ta 150
r Model Differential Scanning
e
p
m 140
Calorimeter (DSC)
e
T

130
Thermodynamic modeling
120
110
0 20 40 60 80 100
%wt B/(A+B)
Most of the systems show eutectic points
Those with melting point bellow 100°C have been considered
360
Pure SA
340
Eutectics
Er-Gly
320
Er-Man
) 300
g
/
J
(
g 8 eutectics
n
itle 280 with melting
m

y point less
b
y 260
p than 100°C
la
h
tn 240 and latent
E
heat ranging
220 from 190 J/g
to 300 J/g
200
180
0 20 40 60 80 100 120 140 160 180 200
Melting point (°C)
Tm : 75°C - 120°C
SELECTED PRODUCTS FOR
Potential to achieved total energy
FURTHER ANALYSIS
density by melting around

120 kWh/m3 – 200 kWh/m3

360
Erythritol
Pure SA
Xylitol Eutectics
340
Molecular alloys
Adonitol
)
g
/
L-Arabitol J( 320
g
n
+ itle
m
Four eutectics 300
y
b
Er/Xy (36/64) yp
la 280
h
Ar/Xy (44/56) tn
E
Ad/Er (70/30)
260
Ar/Er (60/40)
240
70 80 90 100 110 120 130
Melting point (°C)
F C
ULL HARACTERIZATION

Melting point
& Latent heat
LATENT HEAT as high as that of salt hydrates
BUT with no problems of separation, segregation and corrosion
Fit : T  AT  B Density and volume
expansion
Very high density values
compared to most organic PCMs
ρ ~ 1250-1500 kg/m3
liq
Moderate-to-Low volume
expansion for most of them
ΔV/V < 10%
Specific heat capacity
SA
Solid: 1 – 1.8 J/g/K
Liquid: 2.3 – 2.8 J/g/K
Fit : C T AT2 BT C
p x 0.45 - 0.67
Water
4.19 J/g/K
x 0.43 - 0.71
SA-blends
Solid: 0.8 – 1.5 J/g/K
Liquid: 1.8 – 3.0 J/g/K