Influence factor on poisoning and aging of impregnated activated carbon for nuclear air cleaning
Wang Kunjun1, Wang Longjiang1, Han Lihong1, Fan Huiling2, Yu Jie1
1.Department of Environmental Engineering Technology,China Institute for Radiation Protection,Taiyuan 030006; 2.Key Laboratory of Coal Science and Technology,Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan 030024
Abstract: Iodine absorber is a key component of ventilation and off-gas treatment system of nuclear power plant and other nuclear facility,it consists mainly of metal shell and internal impregnated activated carbon.The impregnated activated carbon is caused poisoning and aging effects by a variety of factors,which is the main factor leading to the purification efficiency decline of iodine adsorber and impregnated activated carbon.The adsorption efficiency of radioactive methyl iodide of impregnated activated carbon in different aging conditions were studied,the pore structure of aged activated carbon was analyzed by N2 adsorption,and the main influencing factors of activated carbon poisoning and aging were analyzed.The study found that the efficiency of carbon for more than three years began to decline,the longer the aging time was,the lower the efficiency was.With the use of environment and time,the decline of efficiency was also different.The aging of activated carbon produced a certain adverse effect on itself pore structure,and the influence of poisoning and aging on the impregnation should be the main reason for the decrease in the efficiency.
王坤俊, 王龙江, 韩丽红, 樊惠玲, 俞杰. 核空气净化用浸渍活性炭的中毒老化效应及影响因素分析[J]. 化工新型材料, 2018, 46(9): 190-194.
Wang Kunjun, Wang Longjiang, Han Lihong, Fan Huiling, Yu Jie. Influence factor on poisoning and aging of impregnated activated carbon for nuclear air cleaning. New Chemical Materials, 2018, 46(9): 190-194.
[1]核工业标准化研究所.NB/T 20039.11—2011核空气和气体处理规范 通风、空调与空气净化第11部分:碘吸附器(Ⅰ型)[S].北京:原子能出版社,2011:2-8. [2]Wilhelm J.Development and application of filters for air cleaning in nuclear power plants[J].Nuclear Engineering and Design,1987,103(1):139-147. [3]Sachin U N,Kai C,Vivek U,et al.Capture of harmful radioactive contaminants from off-gas stream using porous solid sorbents for clean environment-a review[J].Chemical Engineering Journal,2016,306:369-381. [4]Zhou J,Hao S,Gao L,et al.Study on adsorption performance of coal based activated carbon to radioactive iodine and stable iodine[J].Annals of Nuclear Energy,2014,72:237-241. [5]Hou X,Andersson K G,Roed J,et al.Dry deposition of elemental iodine on skin,hair,and clothing from air[J].Journal of Radioanalytical and Nuclear Chemistry,2007,271(1):133-143. [6]Kevin W W.Phase I aging assessment of nuclear air-treatment system high efficiency particulate air and adsorbers[J].Nuclear Engineering and Design,1996(163):315-322. [7]Broadbent D.The ageing and poisoning of charcoal used in nuclear plant air cleaning systems[C].CEC European Conference on Gaseous Effluent Treatment in Nuclear Installations,Luxembourg:Graham and Trotman,1985:14-18. [8]Billinge B H M.The desorption of chemisorbed oxygen from activated carbons and its relationship to ageing and methyl iodide retention efficiency[J].Carbon,1984(22):84-89. [9]Deuber H,Gerlach K.Investigations on the aging of activated carbons in the exhaust air of a pressurized water[J].Reactor Nucl Techn,1985(70):161-169. [10]Wilhelm J.Development and application of filters for air cleaning in nuclear power plants[J].Nuclear Engineering and Design,1987,103(1):139-147. [11]American society for testing and materials.ASTM D3803-98 standard test method for nuclear-grade activated carbon[S].Philadelphia,PA:ASTM International,1998. [12]核工业标准化研究所.EJ/T 20056—2014核级活性炭去除甲基碘性能试验方法[S].北京:原子能出版社,2014:2-10. [13]Rastunov L N,Magomedbekov E P,Obruchikov A V.Evaluation of the sorbent layer thickness in iodine filters[J].Atomic Energy,2011,110(1):68-72. [14]Wilhelm J G.Iodine filters in nuclear installations.Luxemburg[C].Commission of the European Communities,1982:125-126. [15]González-García C M,Roman S.Surface free energy analysis of adsorbents used for radioiodine adsorption[J].Applied Surface Science,2013(282):714-717. [16]Gregory W,Peterson J A.Effects of water on the removal of methyl bromide using triethylenediamine impregnated carbon[J].Carbon,2010(48):81-88. [17]Nacapricha D,Taylor C G.Quality control of nuclear charcoals:particle size effect and trapping mechanism[J].Carbon,1996(34):l55-163. [18]González-García C M,González J F.Removal efficiency of radioactive methyl iodide on TEDA-impregnated activated carbons[J].Fuel Processing Technology,2011(92):247-252. [19]Park S W,Lee W K.Adsorption and desorption of gaseous methyl iodide in a triethylenediamine-impregnated activated carbon bed.Separations[J].Technology,1993,3(3):133-142.