Experimental study on supercritical water oxidation of lubricating oil from nuclear power plant
BackgroundRadioactive waste oil mainly comes from the maintenance of equipment such as main pumps and steam turbines of nuclear power plants (NPP), and is a typical radioactive organic liquid waste (ROLW). Because there is no suitable treatment technology for ROLW, it can only be stored for a long t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
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Science Press
2021-07-01
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| Series: | He jishu |
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| Online Access: | http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2021.hjs.44.070603&lang=zh |
| _version_ | 1811169631698681856 |
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| author | LI Shibin XIA Xiaobin QIN Qiang WANG Shuai MA Hongjun |
| author_facet | LI Shibin XIA Xiaobin QIN Qiang WANG Shuai MA Hongjun |
| author_sort | LI Shibin |
| collection | DOAJ |
| description | BackgroundRadioactive waste oil mainly comes from the maintenance of equipment such as main pumps and steam turbines of nuclear power plants (NPP), and is a typical radioactive organic liquid waste (ROLW). Because there is no suitable treatment technology for ROLW, it can only be stored for a long time. Long-term storage has potential safety hazards such as leakage and fire.PurposeThis study aims to solve the problem of radioactive waste oil treatment by carrying out an experimental study on the supercritical water oxidation (SCWO) treatment of lubricating oil from NPP.MethodsA continuous SCWO reaction system was used as experimental platform with maximum working temperature of the 600 ℃ and pressure of 28.4 MPa. The effects of different reaction temperature, reaction time and excess oxygen coefficient on the chemical oxygen demand (COD) removal rate of VG 32 (Mobil DTE light turbine oil) lubricants were investigated. In addition, the reaction kinetics of SCWO treatment of lubricating oil from NPP at 420~580 ℃ was studied.ResultsThe experimental results show that the best operating conditions are reaction temperature of 550 ℃, reaction time of 80 s and oxygen enrichment coefficient of 250%. Under these conditions, the COD removal rate of organic matter is up to 96%. The activation energy Ea of the reaction is 43.10 kJ·mol-1, and the pre exponential factor A is 8.861 s-1. The deviation between the calculated value of the kinetic model and the experimental value is less than 3%.ConclusionsThis work proves the credibity of the model, and lays an experimental basis for supercritical water oxidation treatment of radioactive waste oil. |
| first_indexed | 2024-04-10T16:46:34Z |
| format | Article |
| id | doaj.art-771aafaa24eb4905b18adaaedd31c500 |
| institution | Directory Open Access Journal |
| issn | 0253-3219 |
| language | zho |
| last_indexed | 2024-04-10T16:46:34Z |
| publishDate | 2021-07-01 |
| publisher | Science Press |
| record_format | Article |
| series | He jishu |
| spelling | doaj.art-771aafaa24eb4905b18adaaedd31c5002023-02-08T00:42:03ZzhoScience PressHe jishu0253-32192021-07-01447919810.11889/j.0253-3219.2021.hjs.44.0706030253-3219（2021）07-0091-08Experimental study on supercritical water oxidation of lubricating oil from nuclear power plantLI Shibin0XIA Xiaobin1QIN Qiang2WANG Shuai3MA Hongjun4Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaBackgroundRadioactive waste oil mainly comes from the maintenance of equipment such as main pumps and steam turbines of nuclear power plants (NPP), and is a typical radioactive organic liquid waste (ROLW). Because there is no suitable treatment technology for ROLW, it can only be stored for a long time. Long-term storage has potential safety hazards such as leakage and fire.PurposeThis study aims to solve the problem of radioactive waste oil treatment by carrying out an experimental study on the supercritical water oxidation (SCWO) treatment of lubricating oil from NPP.MethodsA continuous SCWO reaction system was used as experimental platform with maximum working temperature of the 600 ℃ and pressure of 28.4 MPa. The effects of different reaction temperature, reaction time and excess oxygen coefficient on the chemical oxygen demand (COD) removal rate of VG 32 (Mobil DTE light turbine oil) lubricants were investigated. In addition, the reaction kinetics of SCWO treatment of lubricating oil from NPP at 420~580 ℃ was studied.ResultsThe experimental results show that the best operating conditions are reaction temperature of 550 ℃, reaction time of 80 s and oxygen enrichment coefficient of 250%. Under these conditions, the COD removal rate of organic matter is up to 96%. The activation energy Ea of the reaction is 43.10 kJ·mol-1, and the pre exponential factor A is 8.861 s-1. The deviation between the calculated value of the kinetic model and the experimental value is less than 3%.ConclusionsThis work proves the credibity of the model, and lays an experimental basis for supercritical water oxidation treatment of radioactive waste oil.http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2021.hjs.44.070603&lang=zhsupercritical water oxidationvg 32 lubricantcod removal ratereaction kinetics |
| spellingShingle | LI Shibin XIA Xiaobin QIN Qiang WANG Shuai MA Hongjun Experimental study on supercritical water oxidation of lubricating oil from nuclear power plant He jishu supercritical water oxidation vg 32 lubricant cod removal rate reaction kinetics |
| title | Experimental study on supercritical water oxidation of lubricating oil from nuclear power plant |
| title_full | Experimental study on supercritical water oxidation of lubricating oil from nuclear power plant |
| title_fullStr | Experimental study on supercritical water oxidation of lubricating oil from nuclear power plant |
| title_full_unstemmed | Experimental study on supercritical water oxidation of lubricating oil from nuclear power plant |
| title_short | Experimental study on supercritical water oxidation of lubricating oil from nuclear power plant |
| title_sort | experimental study on supercritical water oxidation of lubricating oil from nuclear power plant |
| topic | supercritical water oxidation vg 32 lubricant cod removal rate reaction kinetics |
| url | http://www.hjs.sinap.ac.cn/thesisDetails#10.11889/j.0253-3219.2021.hjs.44.070603&lang=zh |
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