September 2017

Special Focus: Refining Technology Developments

Dividing wall column applications in FCC naphtha splitter columns

Dividing wall column (DWC) technology is becoming more widely accepted throughout the process industries as a means to increase efficiency and reduce capital and energy costs.

Bhargava, M., Kalita, R., Gentry, J. C., GTC Technology US, LLC

Dividing wall column (DWC) technology is becoming more widely accepted throughout the process industries as a means to increase efficiency and reduce capital and energy costs. To illustrate the advantages of applying DWC technology for the revamp of existing distillation columns, a fluid catalytic cracking unit (FCCU) at a refinery owned by a major refinery corporation in India is examined here. This unit separates cracked naphtha into three streams, including wide-boiling cracked naphtha. However, a significant overlap was noticed between the side cut and the bottom product due to a poor degree of separation. In the process flow scheme, the side-cut product (heart-cut naphtha) was transpor

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