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SDK Completes Ethylene Plant Modernization Work at Oita

Showa Denko K.K.
May 28, 2010

Showa Denko K.K. (SDK) has completed the work of improving energy efficiency of its ethylene plant at the Oita Complex, installing large state-of-the-art cracking furnaces. Operation of the renovated plant started on May 2.

With the completion of the work, energy efficiency has improved 5.3% and CO2 emissions will be reduced by 59,000 tons a year. Furthermore, the new furnaces can use a wide variety of raw materials such as LPG, NGL, kerosene and light oil, resulting in greater flexibility in choosing feedstock.

Due to this and other steps, the Showa Denko Group will be able to reduce its CO2 emissions by 6% from the 1990 levels in compliance with the Kyoto Protocol, without relying on emission trading.

The energy-efficiency-improvement work at our ethylene plant in Oita was supported by the New Energy and Industrial Technology Development Organization as part of its project for assisting companies to rationalize the use of energy.


1.Details of the construction work

We replaced seven conventional small cracking furnaces with two modern high-efficiency large crackers (each with capacity of producing 100,000 tons of ethylene a year). At the same time, we improved the waste heat recovery system and renovated the pre-distillation system. As the new cracking furnaces can use a variety of non-naphtha feedstock, we can respond to market trends in raw materials and petrochemical products in a more flexible manner.

2.Outline of the naphtha cracking ethylene plant at Oita Complex

Location 2, Nakanosu, Oita City, Oita Prefecture
Start-up June 1969
Ethylene production capacity (No change from the capacity before the work) In years without maintenance shutdown:695,000 t/y
In the year of maintenance shutdown:615,000 t/y
Average:675,000 t/y
Start-up of the new cracking furnaces May 2010

Newly installed cracking furnace

For more information, contact:
IR & PR Office (Phone: 81-3-5470-3235)