Abstract:

Active clay was expected to load into the 0.6 Mt/a aromatic combined unit to remove the olefins from reformate originally.However,the active clay has severe disadvantages of frequent replacement during operation,immense solid waste emission and harsh labor intensity.Compared with active clay,TCDTO-1 refinement catalyst features long single lifetime,high olefin removal rate,recyclability and environmental-friendly.Thus,TCDTO-1 catalyst was employed to replace the active clay.The running data of TCDTO-1 were collected from 4 columns in 1 800 d during 11cycles.The results demonstrated that the single lifetime of TCDTO-1 refinement catalyst was roughly 100~220 d,the total lifetime was 370~690 d,the single raw material process capacity of TCDTO-1 was 2 400~7 700 t per ton,the raw material process capacity of TCDTO-1 was 11 000~21 000 t in its total lifetime.The lifetime of TCDTO-1 would be impacted by properties of raw material,process load,the activity of regenerated catalyst and so on.In conclusion,the process and unit ran remarkably with the employment of TCDTO-1.TCDTO-1 refinement catalyst could meet the requirement of process operation well.

Key words: olefin-removal, aromatics, TCDTO-1, refinement catalyst