Study compares COS-removal processes

A recent study evaluated the different treating processes that remove carbonyl sulfide (COS) from propane streams. The study grouped seven different process types into nonregenerable, regenerable, and hybrid system categories and outlined the advantages, disadvantages, and cost basis for each.Because millions of gallons of propane trade commercially every day, a detailed understanding of the allowable limits for COS is important to suppliers and users of propane. COS is a propane contaminant; removal systems are necessary when COS concentrations exceed allowable limits.The US National Institute of Standards and Technology is conducting GPA Project 982 to help establish these limits. GPA P...

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