Water & Process Technologies Fact Sheet Patented DEOX* Process The removal of dissolved oxygen from aqueous streams to <lppb O2 at ambient temperatures. This application uses a patented deoxygenation process. Typical Applications Dissolved oxygen is a significant factor influencing corrosion damage in boilers and steam generator sys- tems. The GE DEOX process is a simple, effective and proven process. The versatility of the process allows use on virtually any source, including filtered surface water, well water, reverse osmosis permeate, conden- sate and demineralised water. The chemical deoxy- genation method consists of the addition of hydrazine to an oxygenated effluent, then passing the mixture through activated carbon to catalyse the reaction be- tween oxygen and hydrazine, followed by a suitable ion exchange bed downstream to remove any carbon leachables or excess hydrazine. (Hydrazine! lOxygenl Activated Carbon INitrogenl [Water] The carbon catalysed reaction is stoichiometric and rapid even at cold (1°C or 34°F) influent water temper- atures. Dissolved oxygen effluent concentrations of <lppb are common from influent containing 12 to 14ppm dissolved oxygen. Activated carbon is a true catalyst and is not consumed during the process. No metallic catalysts are involved. The reaction products are inert nitrogen gas and water. Hydrazine has a unique advantage over other chemi- cal oxygen scavengers such as carbohydrazine, dieth- yl hydroxylamine (DEHA), hydroquinone and sodium sulfite; which add TOC, dissolved solids, carbon dioxide and other impurities downstream. A "flywheel" effect allows the system to operate temporarily after shut down or loss of hydrazine feed without significant quality degradation. General Properties The GE DEOX process is available for extended term or emergency and supplemental service. Custom sys- tems are recommended for extended term use, and a variety of mobile systems are available for emergency and supplemental requirements. The process is also available under license agreement for users who wish to use and operate the equipment employed. Figure 1: MobileFlow* Typical Loading Schemes Pressure Drop vs. Flow _Flow rote ImVhr)_ Figure 2: Typical loading performance Find a contact near you bvvisitina www.aewater.com and clicking on "Contact Us". * Trademark of General Electric Company; may be registered in one or more countries. ©2014, General Electric Company. All rights reserved. Deoxygena'ion / Oenmeralisction up to 4 5 mVhr * Ftequ res downstream ion Exchange N.8. Alternative loading schemes ore also available Acid Cation Strong Ease