Monitor and minimize corrosion in high-TAN crude processing
In addition to inhibitor dosing, intensive corrosion monitoring and analytical tests play a major role in equipment and piping health monitoring and in analyzing stream properties online.
High-acid crude (HAC) oils, also called high-total acid
number (TAN) crudes, are oils where TAN [expressed in terms of
milligrams of potassium hydroxide per gram (mg KOH/g)] is more
than 0.5. Acidity is mainly due to the presence of naphthenic
acids. These crudes trade at discounts of about $3/bbl to
$10/bbl to conventional crudes; therefore, processing these
crudes improves refinery bottom lines. However, processing
high-TAN crudes is also challenging for refineries, especially
those not designed to handle naphthenic crudes.
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