Effects of Flash Zone Temperature Upon Resid Production and Cut Point

Increasing the flash zone temperature also has dramatic effects upon the resid production and cut point. Increasing the flash zone temperature decreases the resid production rate.

 

 

Increasing the flash zone temperature increases the resid cut point.

 These charts contain no surprises- the higher the flash zone temperature, the less the resid production. Fuels refiners trying to minimize resid production typically maximize the flash zone temperature up to the temperature limit at which excessive cracking and/or coking occurs in the vacuum furnace.

Deep Cut Vacuum Towers