| 초록 |
It is well known that dissolved oxygen (DO) has a harmful effect on the corrosion of system materials in make-up water storage tank in nuclear power plant (NPP). To prevent this problem, there are various methods to remove the DO. Hydrazine method which uses hydrazine as reduction agent is applied in NPP. However, the method has a few handicaps such as temperature, pH, toxicity, high cost of installation and so on. For the purpose of developing the best method for DO removal from make-up water storage tank, it is necessary to overcome the disadvantages of hydrazine treatment. From this viewpoint, membrane-based oxygen removal system (MORS) has many advantages than other methods, for example, friendly environmental process, versatility of operation conditions with high temperature and low pressure, small space, low cost and so on. In this study, to obtain better efficiency of MORS, we modified the polypropylene (PP) hollow fiber membrane by plasma treatment and supported palladium (Pd) as metal catalyst on the surface of the membrane. Plasma treatment was carried with atmospheric pressure plasma using dielectric barrier discharge (DBD) technology. By plasma treatment, free radicals were generated on the surface of PP membrane and hydrophobic characteristics was changed to hydrophilic. |
