What is the general required level for the alkaline nitrogen content in the hydroprocessing feedstock for aviation fuel?
Thread Content
The current products from this unit have a high level of alkaline nitrogen, and the pressure drop in the heat exchanger after the reactor has increased; ammonium salt crystallization is suspected as the cause. The process specifications do not specify any requirements regarding the alkaline nitrogen content of the raw materials. I was wondering if sister companies that handle jet fuel raw materials have any requirements regarding alkaline nitrogen content
Straight-run oil has a low level of basic nitrogen; when ammonium salts crystallize, in addition to basic nitrogen, there is also neutral nitrogen
Currently, **there are no standards for the nitrogen content in aviation fuel.** Specifically, it depends on the process requirements; generally, water is used for elution to remove ammonium salts.