Blog icon

Processes requiring intimate contact between gases and liquids are usually carried out in packed columns. These columns can be huge and expensive but hit a barrier called the flood point which limits the throughput of the gases and liquids.

Rotating Liquid Sheet (RLS) contactor

We have developed a new kind of contactor that overcomes the flood point limit. This contactor can process twice the gas volume rate at half the pressure drop in the same diameter vessel.


The technology is based on generating unbroken sheets of liquid in the shape of multiple blades or helices, emitted from a central rotating slotted tube. The sheets act effectively as a fan to drive the gas through the contactor between the closely spaced liquid sheets.

Column diameters of approximately 1 meter have been successfully tested at pilot scale with gas-liquid contact surface areas matching that of equivalent packing materials.

The RLS contactor can be designed to deliver operating savings in other conventional chemical processes. The design reduces the size of the column and eliminates the column packing, which enables an overall capital cost reduction of approximately 30 per cent and a power consumption reduction of an estimated 25 per cent compared to a conventional gas/liquid contactor.


The RLS field of application is vast – anywhere that requires the transfer of chemical components between gas and liquid streams at high rates and low pressure drop.

Examples include:

  • flue gas clean-up
  • waste-water treatment
  • distillation
  • solar cooling
  • chemical reaction between gases and liquids.

Intellectual property

CSIRO patent in several countries. In-house design and operational know-how.

The team

Our team consists of engineers and multi-skilled trades people with more than 30 years experience in theoretical, modelling and practical application of the technology.

Could this technology provide you with a competitive edge?

Contact us to find out more about our licensing and investment options.

Contact us

Find out how we can help you and your business. Get in touch using the form below and our experts will get in contact soon!

CSIRO will handle your personal information in accordance with the Privacy Act 1988 (Cth) and our Privacy Policy.

First name must be filled in

Surname must be filled in

I am representing *

Please choose an option

Please provide a subject for the enquriy

0 / 100

We'll need to know what you want to contact us about so we can give you an answer

0 / 1900

You shouldn't be able to see this field. Please try again and leave the field blank.