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- Title
Study on enhancement mechanism of NO absorption in K2FeO4 solution basing on mass transfer-reaction theory.
- Authors
Liu, Yangxian; Zhang, Jun; Xie, Fang; Wang, Qian; Pan, Jianfeng; Yin, Yanshan
- Abstract
A study on enhancement mechanism of NO absorption using ferrate (VI) (K 2 FeO 4 ) solution in a bubbling reactor basing on mass transfer-reaction kinetic theory was carried out for the first time. Influencing factors and mass transfer-reaction process of NO absorption were analyzed. The interrelation between mass transfer and chemical reaction was revealed. The key mass transfer and kinetic parameters were determined. The mass transfer-reaction kinetic rate equation (model) was also established. The results reveal that increasing K 2 FeO 4 concentration, NO concentration and solution pH increases NO absorption rate, but increasing SO 2 concentration reduces NO absorption rate. The total reaction is a pseudo-2.3 order reaction ( C Fe O 4 2 − ≤ 0.2 mol/L ) and a pseudo-1.26 order reaction ( C Fe O 4 2 − > 0.2 mol/L ). NO removal reaction is a rapid reaction, and NO absorption rate mainly depends on gas phase mass transfer coefficient, interfacial area and chemical reaction rate. The reactors with a large gas–liquid contact area will be more suitable for enhancing the absorption of NO in ferrate (VI) (K 2 FeO 4 ) solution. The established NO absorption rate equation has a good agreement with the experimental values.
- Subjects
NITROGEN dioxide; ABSORPTION; POTASSIUM ferrate; MASS transfer; CHEMICAL reactions; NERNST'S diffusion layer; GAS phase reactions
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2016, Vol 111, p196
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2016.05.002