科研之友
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摘要
Flue gas desulfurization (FGD) technologies have been applied worldwide in power plants to achieve regulatory standards for the emission of SO2. However, commercial methods in practice require increased costs for disposal of the FGD residuals or by-products. An electromembrane reactor for recycling and resource recovery of FGD residuals was proposed in this study. On the basis of previous work, a mathematical model was developed to describe the mass balance of proposed electromembrane reactor by originally introducing the dimensionless groups, which can help in understanding the mechanism of electrochemical processes and in removing barriers against scaling up a lab-scale chemical unit to a commercial size. On the other hand, results of numerical simulation agreed well with the experimental data, which verified the capability of the developed model for mass transfer. With the help of dimensionless groups, analysis of the model revealed that current density, flow pattern, and initial concentration of acid and base are key parameters in the process of optimization, coinciding with the experimental results. In addition to these findings, the control step in mass transfer can be estimated by analyzing the value of dimensionless parameters, and an appropriate solution for optimization can be further clarified by the dependence of Sh on Re, Sc, and some dimensionless quantities. If this technology is integrated into an existing FGD facility, money-consuming chemical processes could be transferred into a renewable resource and clean energy conversion process.
- 出版日期2018-2
- 单位华东理工大学
