Destructive oxidation of ethanol in the corona discharge reactor
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The results of investigation of ethanol destructive oxidation (model aliphatic alcohol) in a corona discharge reactor are presented. The process was performed at the temperature of 303 K in the corona discharge generator - the reactor system manufactured in our laboratory. The process temperature was kept constant by cooling down the reactor with a stream of air. The measurements were carried out using the following process parameters: the inlet ethanol concentration in the stream of gases in the range of 0.0028 to 0.132 mol/m3 (0.128 ÷ 6.086 g/m3), the gas flow velocity in the range of 0.15-0.33 m3/h (space velocity in the range of 1220 ÷ 2680 m3/(m3R ·h)) and the power supply to the reactor ranged from 1.6 to 86.4 W. The active volume of the reactor was 1.23·10-4 m3. The phenomenological method was applied for the description of the process. It was based on the assumptions that the reaction rate can be described by the first order equation in relation to the ethanol concentration and the design equation of flow tubular reactor can be applied for the description of corona reactor. The usefulness of this model was estimated using statistical methods for the analysis of the experimental results. The Statistica 6.0 software was used for this application. The first stage of this analysis showed the dependencies between the considered variables, whereas the second stage was to find the equations describing the influence of the selected process parameters on the rate of ethanol destruction. The parameters of A and B of apparent constant rate equation given in the form of Z = A·exp(-B/P) were also determined.The results of the investigations indicated that the applied corona discharge generator - reactor system assures a high efficiency of purification of the air and industrial waste gases contaminated by ethanol. The ethanol destruction degree of αi = 0.9 was obtained at the power supply to the reactor amounting to 650 kW/m3R per unit of its active volume. The final products of the reaction were only the harmless carbon dioxide and water vapour. It has been stated that the rate of the destructive oxidation of ethanol reaction is well described by the first order equation in relation to the ethanol concentration. Under isothermal conditions, the reaction rate also depends on the power supply to the reactor. This dependence is well described by the empirical equation Z = 3,233·exp(-82,598/P).The obtained results also indicated that the method of destructive oxidation of ethanol in the corona discharge reactor can be useful for the removal of ethanol and probably other aliphatic alcohols from different gases. The described method of calculation of the real rate of the process can be successfully used in the design of corona discharge reactors applied for such processes.
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- Institute of Chemical Engineering and Environmental Protection Processes, West Pomeranian University of Technology, al. Piastów 42, 71-065 Szczecin, Poland
- Institute of Chemistry and Environmental Protection, West Pomeranian University of Technology, al. Piastów 42, 71-065 Szczecin, Poland
- West Pomeranian University of Technology, Electrical Engineering, ul. Sikorskiego 37, 70-313 Szczecin, Poland
- Spivey, J. J. (1987). Complete catalytic oxidation of volatile organics.Ind. Eng. Chem. Res., 26 (11), 2165-2180. DOI: 10.1021/ie00071a001.[Crossref]
- Wu, C-W., Chen, R-H., Pu, J-Y. & Lin, T-H. (2004). The influence of air-fuel ratio on engine performance and pollutant emission of an SI engine using ethanol - gasoline - blended fuels.Atmospheric Environment, 38, 7093-7100. DOI: 10.1016/j.atmsenv.2004.01.058.[Crossref]
- Guerrieri, D. A., Caffrey, P. J. & Rao, V. (1995). Investigation into the vehicle exhaust emissions of high percentage ethanol blends. SAE Paper 950777, pp. 85-95.
- Kalisiak, S. & Paterkowski, W. (1999). The semiconductor corona generator for cleaning gas pollution. Fourth International Conference on Unconventional Electromechanical and Electrical Systems, St. Petersburg, Russia, 21-24 June 1999. pp. 873-877.
- Kalisiak, S. & Paterkowski, W. (2001). Destrukcyjne utlenianie propanolu-2 w reaktorze koronowym.Inżynieria Chemiczna i Procesowa, 22 (3), 493-503.
- Paterkowski, W. (2001). Destrukcja octanu n-butylu w reaktorze koronowym.Inżynieria Chemiczna i Procesowa, 22 (3), 239-249.
- Paterkowski, W. & Parus, W. (2003). Kinetyka destrukcyjnego utleniania octanu n - butylu w reaktorze koronowym.Inżynieria Chemiczna i Procesowa, 24 (2), 311-318.
- Zielińska, J. (2000). Badanie skuteczności działania reaktora koronowego. Unpublished doctoral dissertation, Szczecin University of Technology, Poland.
- Oda, T., Yamaschita, R., Haga I., Takahashi, T. & Masuda, S. (1996). Decomposition of gaseous organic contaminants by surface discharge induced plasma chemical processing - SPCP.IEEE Transaction on industry applications, 32/1, 118-124, DOI: 10.1109/28.485822.[Crossref]
- Sato, T., Kambe, M. & Nishiyama, H. (2005). Analysis of a methanol decomposition process by a non-thermal plasma flow.JSME International Journal Series B, 48 (3), 432-439, DOI: 10.1299/jsmeb.48.432.[Crossref]
- Sobacchi, M. G., Saveliev, A. V., Fridman, A. A., Gutsol, A. F. & Kennedy, L. A. (2003). "Experimental assessment of pulsed corona discharge for treatment of VOC emissions". Plasma Chemistry and Plasma Processing. 23/2, 347-370, DOI: 10.1023/A:1022976204132.[Crossref]
- Cal, M. P. & Schleup, M. (2001). Destruction of benzene with non-thermal plasmas in dielectric barrier discharge reactors.Environmental Progress. 20/3, 151-156, DOI: 10.1002/ep.670200310.[Crossref]
- Hirasawa, M., Seto, T. & Kwon, S-B. (2006). Decomposition of volatile organic compounds using surface-discharge micro plasma devices.Jpn. J. Appl. Phys. 45, 1801-1804. DOI: 10.1143/JJAP.45.1801.[Crossref]
- Mista, W. & Kacprzyk, R. (2008). Decomposition of toluene using non-thermal plasma reactor at room temperature.Catalysis Today. 137/2-4, 345-349. DOI: 10.1016/cattod.2008.0.009.[WoS][Crossref]
- Tamon, H., Imanaka, H., Sano, N. & Okazaki, M. (1998). Removal of aromatic compounds in gas by electron attachment.Ind. Eng. Chem. Res. 37/7, 2770-2774. DOI: 10.1021/ie980071v.[Crossref]
- Korzekwa, R. A., Grothaus, M. G., Hutcherston, R. K., Roush, R. A. & Brown, R. (1998). Destruction of hazardous air pollutants using a fast rise time pulsed corona reactor.Review of Scientific Instruments. 69/4, 1886-1892. DOI: 10.1063/1.1148859.[Crossref]
- Wang, H., Li, D., Wu, Y., Li, J. & Li, G. (2009). Removal of four kinds of volatile organic compounds mixture in air using silent discharge reactor by biopolar pulsed power.Journal of Electrostatics. 67, 547-553. DOI: 10.1016/j.elstat.2008.11.004.[WoS][Crossref]
- Francke, K-H., Miessner H. & Rudolph R. (2000). Plasmacatalytic processes for environmental problems.Catalysis Today. 59/3, 411-416. DOI: 10.1016/S0920-5861(00)00106-0.[Crossref]
- Roland, U., Holzer, F. & Kopinke F-D. (2002). Improved oxidation of air pollutants in non-thermal plasma.Catalysis Today. 73/3, 315-323. DOI: 10.1016/S0920-5861(02)00015-9.[Crossref]
- Demidiouk, V. & Jae Ou, Ch. (2005). Decomposition of volatile organic compounds in plasma catalytic system.IEEE Transactions on Plasma Sciences. 33/1, 157-161. DOI: 10.1109/TPS.2004.841621.[Crossref]
- Van Durme, J., Dewulf J., Leys, C., & Van Languenhove, H. Combining non-thermal plasma with heterogeneous catalysis in waste gas treatment: A review. (2008). Applied Catalysis B: Environmental. 78, 324-333. DOI: 10.1016/j.apcatb.2007.09.035.[WoS][Crossref]
- Magureanu, M., Mandache, N. B., Goigneaux, E., Paun, C. & Parvulescu, V. I. (2006). Toluene oxidation in a plasmacatalytic system.Journal of Applied Physics. 99, 123301-12307. DOI; 10.1063/1.2204353.[Crossref]
- Einaga, H., Ibusuki, T. & Futamura, S., (2001). Performance evaluation of a hybrid system comprising silent discharge plasma and manganese oxide catalysts for benzene decomposition.IEEE Transactions on Industry Applications. 37/5, 1476-1482. DOI: 10.1109/28.952524.[Crossref]
- Szarawara, J. & Skrzypek J. (1980). Podstawy inżynierii reaktorów chemicznych. WNT, Warszawa, Poland.
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