TY - JOUR
T1 - Remediation of dichloromethane (CH2Cl2) using non-thermal, atmospheric pressure plasma generated in a packed-bed reactor
AU - Abd Allah, Zaenab
AU - Whitehead, J. Christopher
AU - Martin, Philip
N1 - Air Pollution and Industrial Hygiene 56-23-5 (Carbon tetrachloride); 74-90-8 (Hydrogen cyanide); 75-44-5 (Phosgene); 124-38-9 (Carbon dioxide); 630-08-0 (Carbon monoxide); 2696-92-6 (Nitrosyl chloride); 7647-01-0 (Hydrochloric acid); 10024-97-2 (Nitrogen oxide (N2O)); 10102-43-9 (Nitric oxide); 10102-44-0 (Nitrogen dioxide) Role: FMU (Formation, unclassified), FORM (Formation, nonpreparative) (remediation of dichloromethane using non-thermal, atm. pressure plasma generated in packed-bed reactor); 7727-37-9 (Nitrogen) Role: NUU (Other use, unclassified), PEP (Physical, engineering or chemical process), PROC (Process), USES (Uses) (remediation of dichloromethane using non-thermal, atm. pressure plasma generated in packed-bed reactor); 7782-44-7 (Oxygen) Role: OCU (Occurrence, unclassified), OCCU (Occurrence) (remediation of dichloromethane using non-thermal, atm. pressure plasma generated in packed-bed reactor); 75-09-2 (Dichloromethane) Role: POL (Pollutant), REM (Removal or disposal), OCCU (Occurrence), PROC (Process) (remediation of dichloromethane using non-thermal, atm. pressure plasma generated in packed-bed reactor)
PY - 2014/1/7
Y1 - 2014/1/7
N2 - This work describes the application of a non-thermal plasma generated in a dielectric barrier packed-bed plasma reactor for the remediation of dichloromethane (CH2Cl2, DCM). The overall aim of this investigation is to identify the role of key process parameters and chemical mechanisms on the removal efficiency of DCM in plasma. The influence of process parameters, such as oxygen concentration, concentration of initial volatile organic compounds (VOCs), energy density, plasma residence time, and background gas, on the removal efficiency of 500 ppm DCM was investigated. Results showed a maximum removal efficiency with the addition of 2-4% oxygen into a nitrogen plasma. It is thought that oxygen concentrations in excess of 4% decreased the decomposition of chlorinated VOCs as a result of ozone and nitrogen oxide formation. Increasing the residence time and the energy density resulted in increasing the removal efficiency of chlorinated VOCs in plasma. A chemical kinetic model has been developed on the basis of the proposed reaction scheme, and the calculation of end product concentrations are in general good agreement with the observed values. With the understanding of the effect of the key parameters, it has been possible to optimize the remediation process. © 2013 American Chemical Society.
AB - This work describes the application of a non-thermal plasma generated in a dielectric barrier packed-bed plasma reactor for the remediation of dichloromethane (CH2Cl2, DCM). The overall aim of this investigation is to identify the role of key process parameters and chemical mechanisms on the removal efficiency of DCM in plasma. The influence of process parameters, such as oxygen concentration, concentration of initial volatile organic compounds (VOCs), energy density, plasma residence time, and background gas, on the removal efficiency of 500 ppm DCM was investigated. Results showed a maximum removal efficiency with the addition of 2-4% oxygen into a nitrogen plasma. It is thought that oxygen concentrations in excess of 4% decreased the decomposition of chlorinated VOCs as a result of ozone and nitrogen oxide formation. Increasing the residence time and the energy density resulted in increasing the removal efficiency of chlorinated VOCs in plasma. A chemical kinetic model has been developed on the basis of the proposed reaction scheme, and the calculation of end product concentrations are in general good agreement with the observed values. With the understanding of the effect of the key parameters, it has been possible to optimize the remediation process. © 2013 American Chemical Society.
KW - Plasma (non-thermal
KW - remediation of dichloromethane using non-thermal, atm. pressure plasma generated in packed-bed reactor)
KW - Reactors (packed-bed
KW - Reactors (plasma
KW - Decomposition
KW - Remediation
KW - Residence time (remediation of dichloromethane using non-thermal, atm. pressure plasma generated in packed-bed reactor)
KW - Volatile organic compounds Role: OCU (Occurrence, unclassified), OCCU (Occurrence) (remediation of dichloromethane using non-thermal, atm. pressure plasma generated in packed-bed reactor)
KW - remediation dichloromethane atm pressure plasma packed bed reactor
U2 - 10.1021/es402953z
DO - 10.1021/es402953z
M3 - Article
VL - 48
SP - 558
EP - 565
JO - Environmental Science & Technology
JF - Environmental Science & Technology
SN - 0013-936X
IS - 1
ER -