Are there any hydrogenation units for coker wax oil? Can we just carry out hydrogenation treatment on the entire fraction of coking oil?

I’m not sure if it exists. We used to have it, but it was removed as part of the plant’s thermal balance measures

The 2.2 million tons per year hydrogenation combined treatment unit project at Luoyang Petrochemical was launched in July 2007, with the main installation work carried out by Wujian Company. The feedstock for this unit is a mixture of reduced wax oil, coker wax oil, and deasphalted oil from a combined plant; it operates under conditions of high temperature, high pressure, and in the presence of hydrogen. The unit is currently in the commissioning phase. It is possible to carry out full-range hydrogenation of coking oil directly; both gasoline and diesel can be directly hydrogenated for refining. This post was last edited by Chengbei Zhibei on 2009-2-16 at 18:28.]

http://www.cqvip.com/onlineread/onlineread.asp?ID=21700857

The full distillate of coking oil refers to the gasoline and diesel produced through coking, as well as the rosin oil, right? The 2.2 million tons per year hydrogenation complex at Luoyang Petrochemical does not process the entire range of distillates from coking; I think what was mentioned on floor 1 is that gasoline and diesel are processed together, right? It depends on what the gasoline is used for. If it is to serve as a raw material for things like ethylene, then coker gasoline can be blended into diesel during hydrogenation; however, the gasoline produced in this way is of inferior quality

I believe it is unreasonable to subject the full distillate from coking to hydrogenation. Coking wax oil, due to its high content of polycyclic aromatic hydrocarbons and a large amount of coking dust, is also a very poor feedstock for catalytic cracking units. It can be processed separately in hydrogenation units or in hydrocracking units, but this will affect the service life of the catalysts. The mixed hydrogenation process for coker gasoline and diesel is widely used in China and is quite mature, allowing for long-term operation; however, I personally believe that this process also has some economic disadvantages. Coker diesel has a high cetane number, and its desulfurization and denitration are relatively easy; desulfurization, denitration, and decolorization can be carried out at a lower pressure level of 6.0 MPa. Coked naphtha is affected by the distillation systems in the coking process; in older coking units, the cut point for naphtha in the distillation towers is generally above 200°C, so it cannot be fed directly into the reforming pre-hydrogenation unit ； In newly built coking units, the naphtha cut point is generally kept below 170°C, allowing it to be fed directly into the reforming pre-hydrogenation unit. After the mixed coker gasoline and diesel are hydrorefined, the naphtha fraction must be further separated in the distillation section of the hydrorefining unit; it also needs to be sent to the reforming pre-hydrogenation unit, which adds an additional hydroprocessing step. Therefore, I believe the correct approach is to send coker wax oil to hydrocracking, coker diesel to hydroprocessing separately, and coker naphtha directly to reforming pre-hydrogenation.

:Lol, what the person above said makes a lot of sense too. . . However, hydrogenation of the entire coking fraction is a relatively cost-effective approach. . . All are hydrogenated and then distilled and cut, which makes management and investment easier. . .

However, the hydrogen consumption for the hydrogenation of the entire coking fraction is likely to remain high. . . It is best to conduct small-scale tests in order to determine the specific processing routes and measures. . . :lol

Yes, there is one set at the Yangzi Petrochemical Refinery, which uses catalysts produced by Fuyan.