Midstream 'Catalyst Cooling' for maintenance turnaround now patented

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'Catalyst Cooling' process is now patented to reduce initial planned or unplanned maintenance turnaround for hydroprocessing and reformer units in petrochemical and refining.

The process focuses on last-phase catalyst cooling. It uses a combination of heat exchangers, chillers and pumps. Based on a correlation model specific to a refiner's turnaround operations and timeline for cooling, the process cools reactor catalyst between 12 to 24 hr faster than liquid nitrogen.

With it refiners can move catalyst cooling off the critical path and permit more work to be done while the unit is down. Refiners also avoid cost of nitrogen and potential safety issues associated with extra logistical and human activity required to transport, handle, and dispose of it.

It's reported, "all combined, Aggreko's process can produce savings from $250,000 to more than $5-million, depending if catalyst is on the critical path and the number of refinery units affected."

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