What is in DEHA?
Diethylhydroxylamine (DEHA) is an organic compound with the formula (C2H5)2NOH. Strictly, this is N,N-diethylhydroxylamine. It has an isomer, N,O-diethylhydroxylamine with the formula EtNHOEt. N,N-diethylhydroxylamine is a colorless liquid, although it is usually encountered as a solution.
How does DEHA work?
DEHA reacts with oxygen to form acetate, nitrogen and water; therefore, it does not add any dissolved solids to the system. DEHA is used in boiler water treatment applications, as an oxygen scavenger for medium and high pressure boilers.
What is DEHA in water?
What is DEHA? Dissolved oxygen in boiler system water causes corrosion and pitting of metal surfaces, which can lead to boiler inefficiency, equipment failure, and system downtime. N,N-Diethylhydroxylamine (C2H5)2NOH, or DEHA, is a volatile amine commonly used for oxygen scavenging in a variety of boiler systems.
What is the effect of Diethylhydroxylamine in health?
Ingestion: May cause irritation of the digestive tract. Inhalation: May cause respiratory tract irritation. Vapors may cause dizziness or suffocation. Chronic: Adverse reproductive effects have been reported in animals.
Is amine an oxygen scavenger?
Amine-based water treatment has numerous beneficial properties as an oxygen scavengers in boiler feedwater systems: protects by forming a thin protective magnetite (Fe3O4) layer; prevents lime scale or minerals on Page 4 Project: VpCI S-15 Page 4 of 37 the surface installations; removes old deposits without causing …
What is CO2 absorber?
A carbon dioxide scrubber is a piece of equipment that absorbs carbon dioxide (CO2). It is used to treat exhaust gases from industrial plants or from exhaled air in life support systems such as rebreathers or in spacecraft, submersible craft or airtight chambers.
How does a CO2 absorber work?
A CO2 scrubber is essential for removing CO2 from the air. Air polluted with CO2 is pumped into the scrubber, which reaches an ion exchange resin that isolates the CO2 molecule from other gases. The polluted air is then cleaned and pumped out of the CO2 scrubber, which then must either be discarded or reused.
What causes high TDS in boilers?
As water is boiled within the boiler and steam is produced, then the solids remain in the water and concentrate. Thus, over time the level of total dissolved solids (TDS) increases. Further evaporation causes these dissolved solids to come out of solution, and to produce suspended solids (sludge).
What is the TDS of boiler water?
Boilers are normally operated in the range 2000 – 3500 TDS.
How is oxygen removed from CO2?
A promising method to extract oxygen from CO2, which constitutes more than 95% of the Mars atmosphere, is by using glow‐discharge dissociation of CO2 combined with the permeation of the generated oxygen through a Ag membrane.
What is the chemical name of DeHa?
Diethylhydroxylamine ( DEHA) is an organic compound with the formula (C 2 H 5) 2 NOH. Strictly, this is N, N -diethylhydroxylamine. It has an isomer, N, O -diethylhydroxylamine with the formula EtNHOEt.
How do you make DeHa products?
DEHA products are manufactured by the reaction of a triethylamine and a peroxide, followed by purification and distillation. Eastman manufactures DEHA Anhydrous and DEHA 85%. Both DEHA Anhydrous and DEHA 85% function primary as radical and oxygen scavengers.
What are the applications of DeHa?
Microelectronics industry: for example, DEHA is formulated to remove residual photoresist and other residue from microelectronic parts. Photographic industry: DEHA is blended with other chemicals to produce good color development.
What is the ratio of DeHa to DeHa in a boiler?
It is a volatile oxygen scavenger and reacts in a ratio of 2.8/1 DEHA/O 2. It is employed in high pressure (>70 bar) boiler systems due to a very low rate of reaction at low temperatures and pressures.