Adsorption and desorption behavior of anion-exchange resin towards SO42− in the desulphurization process using citric method
- 74 Downloads
The application of weak-base anion-exchange resin for removal the SO42− from the citrate solution to guarantee its good performance for adsorption of SO2 is proposed in this work. The weak-base anion-exchange resin that has prior adsorption towards SO42− compared with citrate, allows the effective removal of such impure anion. We initially chose four kinds of resins, namely D301R, D301G, D370 and D315, to investigate their behavior upon SO42− adsorption and then determined D301R and D315 to give a comprehensive understanding towards their adsorption performance in various condition. Results indicate that D315 possessing better adsorption ability than D301R could be a potential candidate for SO42− removal from the citrate acid solution during the desulphurization process using citric method. The pretreatment of protonation for resins could effectively facilitate their adsorption behavior towards SO42− under the same pH condition. Moreover, we assume that the protonated D315 would meet the practical requirement well given its good performance.
KeywordsSO42− Adsorption Resin Desorption Citric acid
We acknowledge the financial support from National Natural Science Foundation of China (Grant No. 51104115).
Tao Hong guided this work while Hao Cui performed this study and wrote this paper. Tao Hong and Hao Cui contributes equally towards this research. Guibao Qiu and Muhammad Ali Mehmood helped to revised version and improve the writing.
Compliance with ethical standards
Conflict of interest
All authors declare that they have no conflict of interest.
- Farrington, J., Bengtsson, S.: Citrate solution aborbs SO2. Chem. Eng. (1980)Google Scholar
- Hong, T., Li, L.B., Wang, C.G., Ma, G.D., Zhao, X.H., Fu, X.K., Li, W.C.: Characteristics of SO2 absorption in flue gas by citrate solution in packing columns. Chem. Eng. 32, 49–52 (2004)Google Scholar
- Hong, T., Xu, P., Li, L., Gao, J., Kong, H., Gao, M.: Removal of sulfate ion in citrate desorption lean solution. Chin. J. Environ. Eng. 1, 013 (2015)Google Scholar
- Jiang, X., Liu, Y., Du, C., Mu, W., Shao, F.: Flue gas desulfurization by sodium citrate in high gravity rotating packed bed. Environ. Prot. Chem. Ind. 31(5), 409–413 (2011)Google Scholar
- Qiuxiang, Z., Xiaochun, G.: Commercial application of sodium citric acid solution recycling absorption process in tail gas desulfurization of Claus sulfur recovery unit. Pet. Refin. Eng. 7, 005 (2011)Google Scholar
- Skrbic, B., Cvejanov, J.: Citrate process for removal of SO2 from flue gases: Equation for calculation of equlibrium partial pressure of SO2 over aqueous sodium citrate. (1990)Google Scholar
- Sun, J., Li, L., Zhou, G., Wang, X., Zhang, L., Liu, Y., Yang, J., Lü, X., Jiang, F.: Biological sulfur reduction to generate H2S as a reducing agent to achieve simultaneous catalytic removal of SO2 and NO and sulfur recovery from flue gas. Environ. Sci. Technol. 52, 4754–4762 (2018)CrossRefGoogle Scholar
- Xue, J., Lan, X., Shiyi, D.U., Weida, L.I., Meng, L.: Mechanism of SO2 ultrasonic desorption from citrate solution. J. Chem. Ind. Eng. 58(4), 944–950 (2007)Google Scholar