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 economical solution for thermal oxidizers.
Type | Property | Units | Cordierite
Porous | Cordierite
Dense | Mullite | Alumina
Porcelain | Stoneware | Corundum |
1 | Material Density | g / cm3 | 1.70 -1.90 | > 2.3 | >3.0 | >2.6 | > 2.1 | >2.8 |
2 | Bluk Density | g / cm3 | 0.89 | 0.90 | -- | 1.0 | -- | -- |
3 | Specific Surface Area | m2/g | 0.20 -0.30 | -- | -- | -- | -- | -- |
4 | Coefficient of Thermal Expansion(20 -1000) | 10^-6 / k | < 3.4 | < 5.0 | 6.2 | < 6.5 | 4 - 6 | 4 - 6 |
5 | Heat Capacity(20 -1000) | J / kg.k | 700 - 800 | 850 - 1000 | 850 -1050 | 800 -900 | 850 - 910 | 1000 - 1300 |
6 | Thermal Conductivity(350±25C) | w / m.k | 1.3 -1.5 | 1.5 -2.5 | 1.5 - 2.0 | 1.5 - 2.0 | -- | 1.5 - 2.0 |
7 | Resistance to thermal
Shocks (Minimum) | K | 300 | 250 | 350 | 150 | 250 | 450 |
8* | Axial crushing strength | Dry | Kg / block | 2000 | >=4000 | -- | -- | -- | -- |
Immersion | >=2000 | >=4000 | -- | -- | -- | -- |
9 | Water Absorption | % | 25±5 | 1±2 | 13 | 8 | 15 | 10 |
10 | Maximum Operating Temperature | C | 1400 | 1400 | 1600 | 1400 | 1300 | 1600 |
