TY - JOUR
T1 - Mechanistic Study of Selective Absorption of NO in Flue Gas Using EG-TBAB Deep Eutectic Solvents
AU - Dou, Jinxiao
AU - Zhao, Yongqi
AU - Yin, Fengkui
AU - Li, Hua
AU - Yu, Jianglong
N1 - Funding Information:
This work was supported by National Natural Science Foundation of China (21607068) and Education Department Funding Program of Liaoning Province (2016HZPY06). The funding from Youth Foundation of University of Science and Technology Liaoning (2016QN27) is also acknowledged.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2019
Y1 - 2019
N2 - 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 O 2 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 O 2 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 (K 0 ) 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.
AB - 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 O 2 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 O 2 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 (K 0 ) 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.
UR - http://www.scopus.com/inward/record.url?scp=85060103562&partnerID=8YFLogxK
U2 - 10.1021/acs.est.8b05408
DO - 10.1021/acs.est.8b05408
M3 - Article
C2 - 30540453
AN - SCOPUS:85060103562
SN - 0013-936X
VL - 53
SP - 1031
EP - 1038
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 2
ER -