Chemical News

Wednesday, June 25, 2008

Technology - PSA for Nitrogen Recovery in Polymer INdustry

Many polyolefin plants use nitrogen to strip unreacted monomer and other additives from the product polymer. This gaseous waste stream is typically flared, but pressure swing adsorption enables the recovery of the nitrogen, monomer, and additives for reuse. A single unit operation, it delivers the lowest operating cost and the lowest emissions for polymer degassing operations,

while providing nitrogen with a hydrocarbon content as low as 500 ppm. Three units are already in operation.

1. 100% recovery of N2 and hydrocarbons.
2. Annual savings of 81.5 billion Btu.

Source: Air Products