Appropriate hydrocracking process for high-quality feedstocks
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The dry point of conventional VGO is around 540; with pressurized deep drawing technology, this value can be raised to 630. If the entire VGO fraction is fed into a hydrocracking unit, the heat exchangers in such units, which are designed for low dry points, will suffer from severe fouling, as the levels of polycyclic aromatic hydrocarbons, gums, and asphaltenes increase significantly when the dry point is high. Is that hydrocracking process more suitable for processing pressurized deeply drawn VGO? Does anyone know the details of the SSRS process, which was Chevron’s first industrial application in the Western Pacific? It is said to be very suitable for handling some feed materials – is that really the case?
Would that lead to a sharp increase in the consumption of scale inhibitors?
Scale inhibitors only provide temporary relief; the key is to use an appropriate process
Why so high? Can the catalyst still handle it? Let’s go with residue hydrogenation instead
It is a wax oil hydrogenation unit, not a hydrocracking unit followed by catalytic cracking. Zhenhai Refining & Chemical uses bitumen oil in its hydrogenation units; the properties of this oil are worse than those of residue oil. The catalyst used is of the FZC series, which is derived from residue oil, while the catalyst used for purification is type 3936.
Oil that has been deasphalted is still considered good oil. As far as I know, although Zhenhai uses deasphalted oil in its reactors, the wax oil they use is almost all wax oil from the third fractionation stage and above; there is no coker wax oil. Why not try using coker wax oil in blending? Many devices can’t handle it