Q & A > Question Details
What is the typical composition of VGO (Vacuum gasoil) and what is its cracking temperature?
01/04/2017 A: Ganesh Maturu, Self, maturu.ganesh@gmail.com
VGO contains hydrocarbon mateial which is heavier than disel i.e 350 IBP to 585deg c end point. Its cracking temperature is near to 360 deg c. it is preferred to mix hydrogen above this temperature to avoid cracking.
01/04/2017 A: Ralph Ragsdale, Ragsdale Refining Courses, ralph.ragsdale@att.net
The maximum temperature at the heater outlet to avoid cracking is different for each crude and cannot be determined reliably in the lab. The vacuum gas oil EP is adjusted to minimize metals content. Con carbon is used for control test. So, there is no "typical composition."
31/03/2017 A: Sridhar Balakrishnan, Bharat Oman Refineries Limited , laksrid@yahoo.com
Typical composition of vacuum gas oil will be crude oil source dependant. Composition can be predicted by UOP K factor or aniline point of the cut. If it has high aniline point it will be paraffinic , if it is less about fifty deg.C it can be aromatic in nature . Cracking temperature will be above three hundred and fifty degree. C.