| Title: | Electro-scrubbing volatile organic carbons in the air stream with a gas diffusion electrode |
| Author(s): | Yang J; Liu K; Jia J; Cao L; |
| Address: | "School of Resources and Environmental Engineering, State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, PR China. yangji@ecust.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2011.01.082 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "It is demonstrated that exposing the VOC air streams to the electro-scrubbing reactor with a gas diffusion electrode leads to an efficient removal of organics. The importance order of the influence factors on the electro-scrubbing reactor performance is: conductivity, voltage and air stream flow-rate. The effective conductivity and high voltages generally are beneficial to the removal process and the air flow-rate is not a significant factor compared with the other two, indicating that the reactor might have a consistently satisfying performance within a wide range of gas volumetric load. The mass transfer of both organics and oxygen in the reactor is estimated by mathematical model, and the calculation determines the concentration boundary conditions for the 2-ethoxyethyl acetate removal: if the 2-ethoxyethyl acetate concentration in the inflow air stream holds C(G,i) 0.7198%, the controlling step will be the oxygen mass transfer from the air to the liquid in the electro-scrubbing reactor. The Apparent Current Efficiency of the electro-scrubbing reactor was also determined using COD data, which is significantly higher than some commercial metal oxide electrodes, showing that the reactor is energy efficient and has the promise for the future scale-up" |
| Keywords: | Air Pollutants/*isolation & purification Diffusion Electrochemical Techniques/*methods Electrodes Gases Volatile Organic Compounds/*isolation & purification; |
| Notes: | "MedlineYang, Ji Liu, Kaichen Jia, Jinping Cao, Limei eng Research Support, Non-U.S. Gov't Netherlands 2011/02/18 J Hazard Mater. 2011 Apr 15; 188(1-3):125-31. doi: 10.1016/j.jhazmat.2011.01.082. Epub 2011 Jan 26" |
