On the separation of Fischer-Tropsch synthesis catalysts and products

Look at this post; some discussions have taken place. Methods for separating catalysts in slurry beds http://bbs.hcbbs.com/viewthread.php?tid=508199

The separation of catalysts and products mainly occurs in slurry beds, which is actually one of the major challenges in the design of slurry-bed reactors. Sasol already has a commercial solution for this problem; the specifics are described in detail in one of Sasol’s patents, and it’s not appropriate to go into further detail here. Additionally, a small amount of fine catalyst powder is carried along with the product as it exits the reactor, and a specialized filter is used in the final processing stage. For fixed-bed reactors, the separation issue is not significant, as the product flows down as droplets and does not carry much catalyst with it; the product can simply be removed at that point.

This post was last edited by dajun213 on 2009-10-21 at 13:40. It cites fossil-zhang’s post from 2009-7-15 at 12:48 regarding methods for separating catalysts in slurry beds. Separating catalysts from slurry beds is quite complicated; even Sasol, with its extensive experience, made mistakes in its projects in Qatar. As a result, many companies avoiding the use of slurry beds in their current projects. I really admire the determination and courage of the Coal Chemistry Institute, which dares to take on such challenges. Yankuang was able to invest so much money because it possesses advanced slurry bed technology. I once heard a senior executive from Sasol say that they are not afraid of China developing its own slurry bed technology, as they know how long it will take to overcome the difficulties involved. So they can brazenly steal money from the Chinese (they underestimate the strength of the Chinese; I hope those at the Coal Chemistry Institute will succeed). **The project for Yankuang has never been finally approved (is there some relaxation now?) ) It is also related to the cooperation between Sasol and China. Gravity sedimentation certainly won’t work; to filter out small particles, external filtration is essential. Effects can only be seen at a certain scale, and the process must proceed as slowly as possible. To maintain efficiency under such conditions, the filters need to be very large. Several key pieces of equipment for the Sasol slurry bed are not manufactured by the company itself; the reactor is in Japan and the filter is in Germany, and both are of large size. It depends on the documents he sends