期刊
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
卷 83, 期 -, 页码 83-90出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijggc.2019.02.003
关键词
CO2 capture; N-nitrosamine; Electrochemical reduction; Carbon xerogel electrode; Amine CCS waterwash
类别
资金
- Carbon Management Research Group (CMRG)
- Duke Energy
- Electric Power Research Institute (EPRI)
- Louisville Gas & Electric (LGE)
- Kentucky Utilities (KU)
N-nitrosamines, as a class of compounds, have been reported to be mutagenic, cytotoxic, genotoxic and carcinogenic. N-nitrosamine formation and emission are a major concern for amine-based CO2 capture systems. A process using a stationary carbon electrode inside an electrochemical cell was developed and tested in this study to adsorb and decompose two N-nitrosamines, N-nitrosopyrrolidine and N-nitrosodiethylamine, from an aqueous amine solution. The carbon xerogel electrode material has a high N-nitrosamine adsorption capacity and can initiate an electrochemically-mediated reduction of N-nitrosamines to a secondary amine. A greater than 80% reduction of N-nitrosodiethylamine and 90% of N-nitrosopyrrolidine was observed from a simulated amine-based waterwash solution using an applied current up to 300 mA. N-nitrosamine decomposition was effective in solutions with relatively high amine or salt concentrations.
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