Effect of composition of coke deposited in delayed coker furnace tubes on on-line spalling

Preparation and anti-coking application of sol–gel SiO2 coating in a delayed coking furnace

“…14 ) revealed that the coke of the uncoated sample contained iron sulphide and that of the coated sample did not. 4 This finding indicated that the iron sulphide reaction was difficult on the coated sample. It was difficult for coke to adhere to the surface and coke was easily removed along with the flowing oil.…”

“…The presence of sulphides in the residue is likely to result in the corrosion of the walls of the heating furnace tube, thereby causing coke to deposit on the furnace tube surface and making it difficult to peel off the coke. 4 Therefore, the corrosion potential and current were obtained using polarisation curves to analyse the electrochemical performance of the coating. A Princeton electrochemical test system (PARSTAT-2273) was used to determine the corrosion resistance of the samples ( Fig.…”

“…Coking mainly results from formation of iron sulphide on the furnace tube surface. 4,7,8,10,27–29 Dickakia found a visible layer of iron disulphide between a tube wall and the first layer of coke. 30 The iron disulphide behaved like Velcro to trap bitumen molecules and attach them to the inner wall of the furnace tube.…”

Optimization Investigation on Operating Parameters of a Scrubbing Tower Using a Genetic Algorithm

“…More than that, it can deposit in downstream equipment, such as furnace tubes, heat exchangers, and packing, which will degrade the performance of the heat transfer and lead to blockage. The problem of coke powder entrainment has become a constraint to operate safely, steadily, full load, and long term for delayed coking units [3].…”