January 2019

Special Focus: Process Optimization

Analysis of semi-solid “shoe polish” material in a refinery TGTU

Amine units, and to a lesser extent tail gas treating units (TGTUs), experience occasional “shoe polish” sludge contamination.

Engel, D., Nexo Solutions

Amine units, and to a lesser extent tail gas treating units (TGTUs), experience occasional “shoe polish” sludge contamination. This contamination causes a series of detrimental effects ranging from fouling to overloading the filtration system in the unit, leading to high filtration costs. In such cases, filtration is not the proper solution; however, it does alleviate the effects of this aggressive, gel-like contamination. Filter media is rapidly restricted to flow, therefore reducing permeability. This causes fast differential pressure increase, which leads to frequent filter maintenance and high costs. To date, no comprehensive study has been conducted on the nature of this semi-solid, ge

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