TY - JOUR
T1 - Experimental investigation on gasification of cationic ion exchange resin used in nuclear power plants by supercritical water
AU - Wang, Le
AU - Yi, Lei
AU - Wang, Gaoyun
AU - Li, Linhu
AU - Lu, Libo
AU - Guo, Liejin
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10/5
Y1 - 2021/10/5
N2 - Spent ion exchange resins produced by nuclear power plants are radioactive organic waste. Until now, there is no satisfactory industrial treatment. Supercritical water gasification (SCWG) of cationic ion exchange resin (CIER) used in nuclear power plants was carried out in a batch reactor in this study. Results showed that the gasification efficiency increased with the growth of temperature (550–750 °C), addition of alkali homogeneous catalyst (K2CO3), proper ratio loading of catalyst to CIER (1:1), decrease of feed concentration (2–10 wt%) and extension of residence time (10–60 min). Carbon gasification efficiency was up to 97.98% with K2CO3 added and 30 min at 750 °C in the batch reactor. The gaseous products mainly consist of H2, CO, CO2 and CH4. The GC–MS analysis showed that the organic component in liquid products was mainly composed of benzene, monocycle arenes, phenol group and polycyclic aromatic hydrocarbons. Based on the experimental results, the formation and gasification pathways of CIER in SCW were proposed.
AB - Spent ion exchange resins produced by nuclear power plants are radioactive organic waste. Until now, there is no satisfactory industrial treatment. Supercritical water gasification (SCWG) of cationic ion exchange resin (CIER) used in nuclear power plants was carried out in a batch reactor in this study. Results showed that the gasification efficiency increased with the growth of temperature (550–750 °C), addition of alkali homogeneous catalyst (K2CO3), proper ratio loading of catalyst to CIER (1:1), decrease of feed concentration (2–10 wt%) and extension of residence time (10–60 min). Carbon gasification efficiency was up to 97.98% with K2CO3 added and 30 min at 750 °C in the batch reactor. The gaseous products mainly consist of H2, CO, CO2 and CH4. The GC–MS analysis showed that the organic component in liquid products was mainly composed of benzene, monocycle arenes, phenol group and polycyclic aromatic hydrocarbons. Based on the experimental results, the formation and gasification pathways of CIER in SCW were proposed.
KW - Catalyst
KW - Cationic ion exchange resin
KW - Reaction mechanism
KW - Supercritical water gasification
UR - https://www.scopus.com/pages/publications/85108614809
U2 - 10.1016/j.jhazmat.2021.126437
DO - 10.1016/j.jhazmat.2021.126437
M3 - 文章
C2 - 34182418
AN - SCOPUS:85108614809
SN - 0304-3894
VL - 419
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
M1 - 126437
ER -