The kinetics of vapor phase cracking of heavy gas oil and the quality of its liquid products were investigated at temperatures of 600-700 oC. Complete vaporization of feed was achieved by optimizing nozzle tip position and flow rate of sweeping gas. Fixed gas and liquid products were analyzed by gas chromatography. The quality of liquid products was characterized using simulated distillation, elemental analysis and 13C NMR. Coke yields were determined based on the particles separated from liquids and collected at the outlet of reactor. Consistent with gas phase cracking behavior, the coke yields were well below 2 % in most operating conditions. The yields of C1-C4 olefins were 2 to 17 % at residence times of 0.3-2.7 s in our operating temperature range. The corresponding yields of C1-C4 alkanes were only 0.6 to 5 %. The activation energy of the overall cracking reaction was 220 KJ/mol.

Vapor phase cracking of heavy gas oil

243rd National Meeting (2012)

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