AirScience catalytic oxidizers are specifically designed for process applications where the raw-gas contains sulfur or halogens, the oxidation of which create corrosive and poisoning conditions which are not suitable for common catalyst.
AirScience through association with KVT of Austria has a line of sulfur tolerant and halogen application catalysts. The use of a catalyst allows for oxidation of the compounds in the raw gas at lower temperatures than pure thermal oxidation. Depending on the raw-gas composition catalytic oxidation temperatures will vary from 700°F to 1000°F.
Catalytic oxidizers are generally composed of two major elements: a catalytic reactor vessel sized for the required residence time and gas velocity and a heat recovery unit. The heat recovery unit, generally a plate type or shell and tube heat exchanger, transfer the heat from the purified gases to the incoming raw gas prior to their introduction into the combustion chamber. As the heat exchanger (raw-gas pre-heater) has a heat transfer efficiency in the order of 70%, supplementary heat will be required if the calorific value of the raw-gas is not sufficient.
AirScience produces catalytic oxidizers for high and low pressure applications. For high pressure applications AirScience has a proprietary flameless in situ burner that is simpler and more economical than the traditional external hot gas generator and heat exchanger.