WRK Design and Services Ltd - Consulting Chemical Engineers



Consulting Chemical Engineers

PO Box 11676, Birmingham B29 7ZB, United Kingdom
Tel: +44 121 227 5284 • Fax: +44 121 414 5353
Mobile: Dr S Raymahasay: +44 7838 137988

The Downflow Gas Contactor Reactor

The Downflow Gas Contactor Reactor (DGC) is one of the most efficient gas liquid contacting devices available for the process industries. It has evolved from a novel concept of contacting a continuous liquid phase with a dispersed gas phase through a specially designed entry section.

Under operating conditions large quantities of reaction gas and slurry liquid are introduced via a proprietary reactor inlet to create a well dispersed gas/liquid dispersion of high gas hold-ups and very high gas/liquid mass transfer area (1000 m2/m3 to 6000 m2/m3 depending on bubble sizes). The high gas/liquid ratio throughout the dispersion in the column results in excellent gas-liquid contacting and enables the maximum possible gas-liquid mixing.

The gas/liquid dispersion is maintained at a desired level within the reactor preventing gas bubbles flowing through the outlet of the reactor and thus ensuring 100% gas utilisation.

Current Patent Applications

  • UK PATENT APPLICATION No. 1213583.6 made by Patent Agents – Marks & Clerk LLP – for CO2 Entrapment from Air and Biogas Enhancement using a DGC Reactor – "APPARATUS & METHOD FOR SEQUESTERING A GAS" – (July 2012).

Many industries require gas/liquid contacting in a wide range of processes and the DGC can be beneficial to all of them.

For all applications of the DGC, WRK will provide the following services:


  • Process development
  • Basic process design
  • Detailed engineering and supply of key-equipment
  • Modular plant construction
  • Commissioning and start-up services

Contact us now if you would like further information on the DGC reactor and how our services can help you.