Application of “Micro-demolition Atomization” Theory in Feedstock Atomization for RFCCU

Abstract

Based on the “Micro-demolition Atomization” theory of emulsified heavy oil combustion, the heavy oil catalytic cracking feedstock was emulsified by compound nonionic surfactant. The water was dispersed uniformly into oil with drops about 1–5 µm, and could be formed stable water-in-oil emulsion with oil. After being in contact with high temperature regenerated catalyst, the emulsified feedstock was atomized demolishedly, which changed atomization mode and reduced the diameters of liquid drops to about 5 µm, enhanced the effect of catalytic cracking reaction, improved the selectivity of coke and increased the recovery of light oil. The pilotscale test result of catalytic cracking showed that, compared with unemulsified feedstock under the same conditions, the recovery of light oil was increased by 2–3%, the yield of coke was reduced by 0.5–1.0%, and the yield of dry gas was reduced by 0.5–1.5%,respectively. The application of the “Micro-demolition Atomization” theory in the feedstock atomization of the heavy oil catalytic cracking would change traditional atomization mode, and affect the catalytic cracking of the heavy oil significantly.