A four-lump kinetic model for the cracking/coking of recycled heavy oil

• Published in: Fuel (Guildford) Vol. 72; no. 9; pp. 1331 - 1334
• Main Authors: Dave, Narendra C., Duffy, Gregory J., Udaja, Pinky
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 1993; Elsevier
• Subjects: Applied sciences; coking; Crude oil, natural gas and petroleum products; Energy; Exact sciences and technology; Fuels; heavy oils; kinetics; Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units; kinetics; coking; heavy oils; Coking; Kinetic model; Crude oil; Refining; Recycling; Oil shale; Catalytic cracking
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/0016-2361(93)90133-M

In recycled solids processes, shale oil undergoes secondary cracking/coking reactions on the surface of the recycle solids used as the heat carrier. Heavy oil recycle uses these secondary reactions to advantage to convert the heavy oil fraction produced during primary pyrolysis reactions to lighter, more desirable products, thereby reducing the overall severity of hydrotreating which would otherwise be required to upgrade this fraction to a refinery grade feedstock. A four-lump kinetic model has been developed to describe the rate of production of the lighter condensable oil, as well as the coke and non-condensable gases which are also formed. This kinetic model can be used to predict yields from the cracking/coking of heavy oil in any type of reactor.