Application of a New Method in Identifying the Sludge Deposits from Refineries and Gas Plants: A Case of Laboratory-Based Study

Figure 3

The schematic of the unknown black sludge deposit that was found in the diesel oil tank in a refinery: (a) the as-received sample, (b) dichloromethane insoluble, and (c) dichloromethane soluble.

(a)

(b)

(c)