Kinetic study of SO2 with sodium lactate based deep eutectic solvents and modelling of desulfurization intensification in rotating packed bed reactor

被引:9
作者
Dong, Yu-Ning [1 ]
Chen, Wen-Cong [1 ]
Zhang, Liang-Liang [1 ]
Sun, Bao-Chang [1 ]
Chu, Guang-Wen [1 ,2 ]
Chen, Jian-Feng [1 ,2 ]
机构
[1] Beijing Univ Chem Technol, Minist Educ High Grav Engn & Technol, Res Ctr, Beijing 100029, Peoples R China
[2] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
基金
中国国家自然科学基金;
关键词
Deep eutectic solvents; Kinetic study; Desulfurization intensification; Rotating packed bed; Mass transfer reaction model; SULFATE SO2-RICH SOLUTION; FLUE-GAS DESULFURIZATION; SULFURIC-ACID-SOLUTIONS; MASS-TRANSFER AREA; AQUEOUS-SOLUTION; CAVITY ZONE; LIQUID FLOW; ABSORPTION; CO2; REMOVAL;
D O I
10.1016/j.ces.2021.117197
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
As ionic liquids alternative, the deep eutectic solvents (DESs) are expected to realize green and efficient SO2 recovery. In this work, the reaction kinetics of SO2 and sodium lactate (NaLa)/water DES was first studied. The reaction kinetic parameters, including order of reaction, rate constant, pre-exponential factor, and activation energy were determined. In view of the reaction characteristics, desulfurization intensification by high gravity technology was proposed. A mathematic model based on the reaction kinetics was developed to describe the SO2-DES mass transfer and reaction process in a rotating packed bed reactor. To validate this model, the desulfurization efficiency and mass transfer coefficient were measured under different operating conditions. It was demonstrated that SO2 removal efficiency was above 99% under optimized conditions, realizing efficient SO2 recovery. The validity of the proposed model was confirmed by the fact that most predicted mass transfer coefficients agreed well with the experimental results with deviations within +/- 15%. (C) 2021 Elsevier Ltd. All rights reserved.
引用
收藏
页数:14
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