Temperature Measurement


Thermocouples in gasification reactors

November 2019 Temperature Measurement

Gasification reactors, due to their harsh process conditions, place high demands on the instruments used there. Many manufacturers have reacted to this and adapted their products accordingly, but what are the optimisation possibilities for thermocouples used at higher process pressures?

The challenge: gasification reactors

In a gasification reactor, there is an extremely aggressive process atmosphere and, with that, the risk of poisoning of the noble metal thermocouple. The process conditions often lead to shutdowns and interruptions in operation. Profitability and safety aspects are thus two important themes in connection with the instruments used in them.

The solution: Sapphire thermocouples

WIKA has developed the TC84 sapphire-design, high-temperature thermocouple specifically for use in gasification reactors. Through the use of a sapphire protection tube, the high-temperature thermocouple is protected from poisoning by the aggressive process atmosphere during operation. The reason for this is its monocrystalline structure. The sapphire-design thermocouple has, as a result of its construction, a significantly higher service life than other high-pressure thermocouples and, therefore, contributes to a clear reduction in process downtime.


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