Journal of Radiation Research and Radiation Processing, Volume. 42, Issue 1, 010204(2024)
γ-Radiolysis of the aqueous ammonia solution saturated by N2
Figures & Tables(8)
Fig. 1. Residual ammonia concentrations and pH values under different N2 pressures at 25˚C
Fig. 2. Concentrations of nitrogen oxides and H2 under different N2 pressures at 25 ℃
Fig. 3. Residual ammonia concentrations and pH values under different Vg/Vl ratios at 25 ℃
Fig. 4. Concentrations of nitrogen oxides and H2 under different Vg/Vl ratios at 25 ℃
Fig. 5. Residual ammonia concentrations and pH values under different temperatures
Fig. 6. Concentrations of nitrogen oxides formed by the radiolysis of ammonia solution under different temperatures
Fig. 7. (a) Initial ammonia concentration 30 mg/L, absorbed dose rate 0.5 Gy/s, absorbed dose 14.4 kGy, validation of the radiolysis model at different temperatures; (b) at 300 ℃, neutron 2 500 Gy/s, γ 1 500 Gy/s, residual ammonia concentration during the radiolysis process of aqueous ammonia solutions with different initial concentrations
Table 1.
Elementary reactions between nitrogen-containing species during the radiolysis of ammonia solutions at 25 oC View tableView in ArticleTable 1.
Elementary reactions between nitrogen-containing species during the radiolysis of ammonia solutions at 25 oC 序号No. 反应方程式 Reaction 反应速率常数 Reaction rate constant 1 NH3 + •OH → •NH2 + H2O 9.7×107 2 ·NH2 + •H → NH3 1.0×1011 3 ·NH2 + eaq- → NH3 + OH- 1.0×1011 4 ·NH2 + HO2• → NH3 + O2 1.0×1011 5 ·NH2 + •OH → NH2OH 9.5×109 6 ·NH2 + H2O2 → •NHOH + H2O 9.0×107 7 ·NH2 + •NO → N2 + H2O 1.0×109 8 ·NHOH + •H → NH2OH 1.0×109 9 ·NHOH + eaq- → NH2OH + OH- 1.0×1010 10 ·NHOH + •NHOH → N2 + H2O + H2O 1.0×107 11 ·NHOH + HO2•→ NH2OH + O2 1.0×109 12 ·NO + •OH → HNO2 2.0×1010 13 NH2OH + •OH → •NHOH + H2O 9.5×109 14 NH2OH + eaq- → •NH2 + OH- + H2O 9.2×108 15 HNO2 + •H → •NO + H2O 4.5×108 16 HNO2 + NH2OH → N2O + H2O + H2O 1.0×109 17 N2O + •H → N2 + •OH 2.1×106 18 N2O + eaq- → N2 + •OH + OH- 9.6×109 19 ·NH2 + •NH2 → N2H4 2.2×109 20 NH3 + •H → NH4+ + eaq- 6.7×105 21 NH4+ + eaq- → NH3 + •H 1.5×106 22 NH4+ + OH- → NH3 + H2O 3.3×1010 23a NH3 + H2O → NH4+ + OH- 9.7×103 24 ·NH2 + O2 → •NO + H2O 1.2×108 25 NH4+ + HO2- → NH3 + H2O2 1.0×1011 26 H+ + NH3 → NH4+ + H2O 4.3×1010 27a NH4+ + H2O → H+ + NH3 4.5×10-1 28 N2H4 + OH → •N2H3 + NH3 4.5×109 29 N2H4 + •NH2 → •N2H3 + NH3 1.2×107 30 ·N2H3 + •N2H3 → N2 + NH3 + NH3 1.0×1010 31 ·N2H3 + O2 → •N2H2 + HO2· 3.8×108 32 ·N2H4 + HO2•→ •N2H3 + H2O2 7.0×106 33 ·N2H2 + H2O2 → N2 + H2O + H2O 6.0×101 34 ·N2H2 + •N2H2 → N2H4 + N2 2.0×104 35 N2H4 + •H → H2 + •N2H3 3.0×101 36 a N2H4 + H2O → •NH2 + •NH2 + H2O 1.8×10-6 37 a ·OH* + H2O → •OH + H2O 1.0×106 38 ·OH* + N2 → •NH + •NO 1.0×1011 39 ·NH + H2 → NH3 1.0×1011
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Zifang GUO, Yang ZHANG, Yifan LI, Zijian LIN, Chunyu LIU, Peng LIN, Mingzhang LIN. γ-Radiolysis of the aqueous ammonia solution saturated by N2[J]. Journal of Radiation Research and Radiation Processing, 2024, 42(1): 010204
Paper Information
Category: Research Articles
Received: Oct. 27, 2023
Accepted: Nov. 13, 2023
Published Online: Mar. 27, 2024
The Author Email: LIN Mingzhang (林铭章)
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