This is a high-purity divinylbenzene polymer with 80% highly-crosslinked DVB. It combines high surface area with a high operating temperature. HayeSep® D polymers offer superior separation characteristics for light gases; significant separation abilities include the separation of CO and CO2 from room air at ambient temperatures and the separation of acetylene prior to other C2's. It is highly recommended for the separation of water and hydrogen sulfide. HayeSep D has a surface area of 803 m2/g.