|Content Type||Conference Paper|
|Title||Corrosion Philosophy - Treat the Source, Not the Symptom|
|Authors||Nile D. Coble, UOP Inc.|
|Source||CORROSION 2002, April 7 - 11, 2002 , Denver, Co|
|Copyright||2002. NACE International|
There have been refinery corrosion and fouling problems since the first refineries were constructed. When corrosion problems are detected, it has been quite common to consider metallurgical upgrades or add corrosion inhibitors to help protect against the corrosion. In the last 30 years, there have been over 40 eases of downstream catalyst degradation and fouling problems due to treating the symptoms upstream without regard to identifying the problem. This paper will address one example and case history.
Petroleum refineries use a number of tools, such as desalting, neutralizing, dilution, and corrosion inhibition to protect process equipment. Because all the salt and sediment is not removed prior to distillation, chloride salts are still being found in the crude unit overhead system. The fractionator overhead exchangers are prone to corrosion due to chloride attack. Addition of neutralizers and corrosion inhibitors to control the higher levels of chlorides in some crude over-head systems have lead to serious problems in down stream process units, such as hydrotreater and reforming units.
|File Size||767 KB||8|