Technology Unit

The liquid phase from the raw gas compression step is directly fed to the fractionation unit.

The fractionation unit of a dehydrogenation plant consists of a stripper column to remove light uncondensables, which are fed to the gas separation unit, and a splitter column to separate olefin product and unconverted paraffin. For C4 applications such a splitter column may not be required depending on the downstream products. Finally, unconverted paraffin is recycled back to the feed preparation unit.

Source: thyssenkrupp Uhde, Dehydrogenation - The STAR process^®, accessed 16^th Jun 2023