Case Studies >> project
 
     


  Carbon Dioxide Recovery at Yara  
  
Planning / Implementation / Main components Axima Refrigeration France
Refrigerant Ammonia (NH3)
System start-up 2001
Dry ice made from carbon dioxide is used to frost and store foodstuff. In its production, it is impossible to prevent some carbon dioxide from being released. The gas producer and dry ice manufacturer Yara - previously named Hydrogas - commissioned Axima Refrigeration France to build a refrigeration plant for the recovery and liquefaction of this released carbon dioxide.

Demands In dry ice production, carbon dioxide is released in a ratio of one kilogram of carbon dioxide per one kilogram of dry ice. Because it is inefficient to allow the gas being released to the atmosphere, Yara was looking for a recovery plant.

Solution The core element of the ammonia-based refrigeration plant is a flooded heat exchanger that liquefies gaseous carbon dioxide at 18 bars by Ammonia evaporating at -32 degrees Celsius in the same heat exchanger. On this plant, two tons per hour of carbon dioxide are recovered.



Technical specifications:
Type of facility (circuit) Condensing unit
Refrigerant NH3
Refrigerating volume 600 kg
Refrigerating refrigerant CO2
Refrigerating capacity 200 kW
Main components flooded heat exchanger, screw compressors, tube bundle vaporizer unit
Special features / Comments The recovery plant's concept sets environmental standards in two ways: On one hand, the excess carbon dioxide is recovered, and on the other hand, the environmentally friendly refrigerant ammonia is used to do so.


Contact:

Axima Refrigeration France
Pierre Bouttefroy
6 Rue de l'atome
F-67800 Bischheim
Phone: +33 (0)3 88 19 19 00
Fax: + 33 (0)3 88 19 19 49
E-mail: pierre.bouttefroy@aximaref.com