This method is fairly accurate for non-condensible gases, such as oxygen and nitrogen.

The non-condensible gas is burned to provide process heat for the pyrolysis process ; refer to Figure 21.

Purger System - Designed specifically for removing non-condensible gases from receivers and all types of condensers.

Such an ejector system uses steam as the motive fluid to remove any non-condensible gases that may be present in the surface condenser.

In power generation, this phenomenon is used in steam jet air ejectors to maintain condenser vacuum by removing non-condensible gases from the condenser.

After most of the steam has been condensed by spout condensers, the non-condensible gas steam mixture is passed through a counter current region which increases the gas-steam reaction by a factor of five.

Refinery gas includes a mixture of non-condensible gases mainly consisting of hydrogen, methane, ethane and olefins obtained during distillation of crude oil or treatment of oil products (e.g. cracking) in refineries.

In those cases, if the distillate product is insoluble in water, the reflux drum may contain a condensed liquid distillate phase, a condensed water phase and a non-condensible gas phase, which makes it necessary that the reflux drum also have a water outlet stream.