The advantage of monolithic honeycombs is that they provide the highest possible heat recovery with the lowest possible pressure drop. A defined laminar gas flow prevents blocking, particle adsorption and corrosion attacks. RTO units equipped with honeycomb ceramic heat media are easy and cost-efficient to operate and maintain. They are most reliable and, for the time being, the most economic solution for thermal oxidizers.
Chemical composition in wt-%
|
chemical components |
Alumina Oxide Porcelain |
Mullit porouse porous |
Cordierite dense |
Cordierite porous |
Quartz Porcelain |
|
SiO2 |
43, 3 |
28, 9 |
57, 2 |
51, 5 |
66, 1 |
|
Al2O3 |
52 |
68, 3 |
25, 5 |
36, 4 |
30, 4 |
|
MgO |
0, 1 |
0, 2 |
7, 9 |
8, 5 |
0, 13 |
|
Alkali |
3, 2 |
1, 9 |
3, 1 |
1, 3 |
2, 8 |
Geometric data
Honeycombs with 25 x 25 Channels , 150 x 150mm cross section, standard length 300mm (other dimensions on request)
|
Outside dimensions |
150 x 150 x 300 mm |
5, 9 x 5, 9 x 11, 81 in |
|
Channels |
25 x 25 |
25 x 25 |
|
Channel width |
4, 9 mm |
0, 195 in |
|
Inner walls |
1, 0 mm |
0, 04 in |
|
Spec. Area |
540 m2/m3 |
164, 6 ft2/ft3 |
|
Void fraction |
67% |
67% |
Physical data
Honeycombs with 25 x 25 Channels , 150 x 150mm cross section, standard length 300mm (other dimensions on request
|
Name |
Alumina Oxide Porcelain |
Cordierite dense |
Cordierite porous |
Mullit porous |
Quartz-Porcelain | |
|
Density |
G/m3 |
2, 68 |
2, 42 |
2, 16 |
2, 31 |
2, 47 |
|
Lb/ft3 |
167, 3 |
151, 1 |
134, 9 |
144, 2 |
154, 2 | |
|
Packing density |
Kg/m3 |
965 |
871 |
778 |
832 |
889 |
|
Lb/ft3 |
60, 2 |
54, 4 |
48, 6 |
51, 9 |
55, 5 | |
|
Average heat expansion coefficient |
10-6 K-1 |
6, 2 |
3, 5 |
3, 4 |
6, 2 |
4, 8 |
|
10-6 °F-1 |
3, 4 |
1, 94 |
1, 89 |
3, 4 |
2, 7 | |
|
Specif. Heat capacity |
J / kgK |
992 |
942 |
1016 |
998 |
897 |
|
BTU/lb°F |
0, 237 |
0, 221 |
0, 243 |
0, 238 |
0, 214 | |
|
Heat conductivity |
W/mK |
2, 79 |
1, 89 |
1, 63 |
2, 42 |
1, 37 |
|
BTU in/ft2 hr°F |
19, 4 |
13, 1 |
11, 3 |
16, 8 |
9, 5 | |
|
Temperature change resistance |
Max K |
500 |
500 |
600 |
550 |
500 |
|
Max °F |
900 |
900 |
1080 |
990 |
900 | |
|
Softening point |
C |
1500 |
1320 |
1400 |
1580 |
1380 |
|
F |
2732 |
2408 |
2552 |
2876 |
2516 | |
|
Max. Temperature |
C |
1400 |
1200 |
1300 |
1480 |
1280 |
|
F |
2550 |
2228 |
2372 |
2696 |
2336 | |
|
Average heat capacity |
KWh/m3K |
0, 266 |
0, 228 |
0, 219 |
0, 231 |
0, 222 |
|
BTU/ft3 °F |
14, 3 |
12 |
11, 8 |
12, 4 |
11, 9 | |
|
Open porosity |
% |
0, 8 |
0, 4 |
15 |
26 |
0, 6 |
|
Acid resistance |
% |
0, 2 |
5 |
16, 7 |
2, 5 |
0, 3 |