Catalyst cracking plant
- The cracking takes place in a 60m long vertical tube, 2m in diameter called a riser reactor.
- The vaporised hydrocarbons are fed into the bottom and forced upwards by steam.
- It takes the mixture about 2 seconds to move from the bottom to the top of the tube. The hydrocarbons arenít in contact with the catalyst for very long.
- The mixture then passes into a separator where jets of steam separate it from the solid catalyst.
- The catalyst goes into a regenerator, where the coke is burnt off it.
- The catalyst is then ready for a repeat of the cycle.
Useful books for revision:
Revise AS Chemistry for Salters (Written by experienced examiners and teachers of Salter's chemistry)
Revise AS Chemistry for Salters (OCR) (Salters Advanced Chemistry)