Vid The catalysts used in thermophore catalytic cracking (TCC) put a heavy strain on the critical parts of the process and wear them out. The short life cycle of these parts may clearly decrease the cost-efficiency of these operations.
The lifting pipe of the cracking plant is such a component. It brings the regenerated catalyst back into the reactor. Due to high temperatures (> 600 °C) and the large flow rate of the catalyst (~ 40 m/s), there is stable local erosion in the bottom section of the pipe, in particular, where the turbulence is greatest.
The use of a metal matrix composite (MMC), Ralloy DMMC 20, as an internal coating material was selected as a solution to the erosion problem at the bottom of the lifting pipe. This material, 20% of which is CR3C2, was HIP pressed onto the internal surface of the loadbearing structure.
We have supplied several lifting pipe parts thanks to their significantly improved durability.