Carbon Dioxide Reuse in Dry Ice Production

Summary

PTT Gas Separation Plant refines natural gas into ethane, propane and Liquid Petroleum Gas (LPG) to be used as raw materials in petrochemical industries. Wastes generated from the separation plant are carbon dioxide (CO2) and mercury (Hg). The CO2 is sent to TIG Air Co Ltd, TRAX Air Co Ltd and Hydro Gas Co Ltd where it is used in the production of solid carbonic (dry ice). Dry ice is solidified carbon dioxide that sublimates at -78.5 degrees Celcius and is used mainly as a refrigerant   Studies are still being conducted on the reuse of the mercury.

Industry

Industry Sector	Specific Industry
Energy utility sector	PTT Gas Separation Plant
Utility gas sector	TIG Air Co Ltd
Utility gas sector	TRAX Air Co Ltd
Utility gas sector	Hydro Gas Co Ltd

Region

Map Ta Phut, Thailand.

Applied Technologies

• Not known

Triple Bottom Line Aspects (direct at operational level)

Economic	Potential reduction in disposal costs for gas separation plant Potential purchase savings of CO2 for dry ice manufacturer
Environment	Reduction in atmospheric CO2 emissions Reduction in raw material use
Social	Potential employment

Additional Comments

None.

References

• GTZ (2000) "Eco-Industrial Parks: A strategy towards Industrial Ecology in Developing and Newly Industrialized Countries", Industrial Estate Authority of Thailand and GTZ GmbH

Last Update

18 January 2007