- Title
- Mechanistic study of selective absorption of NO in flue gas using EG-TBAB deep eutectic solvents
- Creator
- Dou, Jinxiao; Zhao, Yongqi; Yin, Fengkui; Li, Hua; Yu, Jianglong
- Relation
- Environmental Science & Technology Vol. 53, Issue 2, p. 1031-1038
- Publisher Link
- http://dx.doi.org/10.1021/acs.est.8b05408
- Publisher
- American Chemical Society
- Resource Type
- journal article
- Date
- 2019
- Description
- The selective absorption of NO in flue gas has been investigated using a series of deep eutectic solvents (DESs) as novel denitrifying agents. The EG-TBAB DESs used in this work are composed of a hydrogen donor ethylene glycol (EG) and a parent salt tetrabutylammonium bromide (TBAB). Effects of DES composition (EG:TBAB molar ratio), operation temperature, residence time, and O2 concentration in the flue gas on denitrification performances of EG-TBAB DESs have been investigated. The highest denitrification efficiency and capacity were achieved using EG to TBAB molar ratio of 50:1 at an operation temperature of 50 °C. The O2 partial pressure in the flue gas showed no noticeable effects on NO absorption in EG-TBAB DESs. EG-TBAB DESs maintain high denitrification stability after five absorption–desorption cycles. The calculated absorption equilibrium constant (K0) and Henry’s law constant (H) showed that EG-TBAB DESs exhibited high absorption capacity for NO molecules, indicating that they are applicable in industrial denitrification processes. The kinetics analysis of NO absorption in EG-TBAB DESs indicated that EG-TBAB DESs could effectively absorb NO and the absorption of NO was strongly influenced by mass transfer.
- Subject
- salts; environmental pollution; absorption; solvents; viscosity
- Identifier
- http://hdl.handle.net/1959.13/1466665
- Identifier
- uon:47623
- Identifier
- ISSN:0013-936X
- Language
- eng
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