Updated: July 2002

1. Outline

The TSK Dioxin Destruction System consists of a high active catalyst and a special type of reactor called a Lateral Flow Reactor, or LFR.
The so-called Lateral Flow Reactor (LFR) is a system of gas channels and catalysis slabs (see attached figure 1). The flue gas enters the reactor through a gas channel that is open on only one side of the reactor. The gas then passes through a thin catalyst slab in a direction to enter a further gas channel that is only open on the opposite side of the reactor through which the gas leaves the system. The fact that the gas only passes through a thin catalysis layer is reason for the very low-pressure drop possible with this system.

Figure 1

2. Features

The TSK catalyst system has the following features.
(1) High destruction removal performance
TSK catalyst has the dioxin destruction efficiency of 99% or more. Even if the concentration of dioxin in the flue gas is so high, it is possible to meet the strict regulation value.
(2) Wide range of available temperature
A high destruction rate is obtained within the range of the temperature of 160-380ºC. Therefore, extra facilities such as cooling, heating, etc. of exhaust gas need not be considered.
(3) Long catalyst life
Generally a high destruction rate can be maintained for three years or more. Therefore, the exchange frequency of the catalyst can be minimized.
(4) Space-saving
Because TSK catalyst has a very wide internal surface area, space required for installation is smaller than other catalysts . In addition, there is no limitation in the direction of the gas flow.

3. Performance

(1) Temperature dependency
Figure 2 shows the temperature dependency of TSK catalyst. The catalyst has the high dioxin destruction ability compared with the honeycomb type catalyst. In addition, the catalyst has high performance of 95% or more at the temperature of about 150ºC.
(2) Space velocity
The space velocity does not significantly affect the destruction ability (99.5-97%) in the range of 3000-12000 [h^-1].
(3) Pressure drop
TSK catalyst is granular type, and standard slabs thickness is 100mm, which has pressure drop of 0.5 kPa. When the allowable pressure drop is less than that volume, the slab thickness of 20-65mm can be designed. In this case, size of the reactor becomes slightly bigger and the volume of the catalyst does not change.

Figure 2

4. Application

This catalyst can be applied to the incineration plant for municipal wastes, industrial wastes as well as the gas from the chemical plant.
It has also an excellent De-NOx performance, so the simultaneous destruction of dioxin and NOx is possible.